阅读说明：本技术 一种固体推进剂氧燃分装耦合燃烧透明窗实验器及实验方法 (Solid propellant oxygen combustion split charging coupled combustion transparent window experimental device and experimental method ) 是由 胡松启 王印 刘林林 张研 刘殊远 于 2021-06-18 设计创作，主要内容包括：本发明提出一种固体推进剂氧燃分装耦合燃烧透明窗实验器及实验方法。实验器包括富氧燃气发生器和燃烧器；根据不同实验要求,在富氧燃气发生器内放置富氧推进剂药柱或假药石墨棒；燃烧器中空内腔下部开有矩形凹槽,根据不同实验要求,用于放置富燃推进剂药条或富氧推进剂药条；燃烧器前后侧壁开有内小外大的T型截面透明窗,透明窗内密封安装耐热耐压透明介质,外部用透明窗盖板固定；燃烧器一端还安装有喷管。本发明既能满足富氧推进剂自持燃烧精细化诊断研究需求、富燃推进剂自持燃烧精细化诊断研究需求,同时该装置还可以应用于氧燃分装固体推进剂中富氧推进剂与富燃推进剂间的耦合燃烧实验研究。(The invention provides a transparent window experimental apparatus and an experimental method for oxygen-combustion split-charging coupled combustion of a solid propellant. The experimental device comprises an oxygen-rich fuel gas generator and a combustor; according to different experimental requirements, an oxygen-enriched propellant grain or a fake medicine graphite rod is placed in an oxygen-enriched fuel gas generator; the lower part of the hollow inner cavity of the burner is provided with a rectangular groove which is used for placing fuel-rich propellant strips or oxygen-rich propellant strips according to different experimental requirements; the front and back side walls of the burner are provided with a transparent window with a T-shaped section, the inside of the transparent window is provided with a heat-resistant pressure-resistant transparent medium in a sealing way, and the outside of the transparent window is fixed by a transparent window cover plate; one end of the combustor is also provided with a spray pipe. The device can meet the requirements of self-sustaining combustion fine diagnosis and research of the oxygen-enriched propellant and the requirements of self-sustaining combustion fine diagnosis and research of the rich propellant, and can be applied to coupled combustion experiment research between the oxygen-enriched propellant and the rich propellant in the oxygen-combustion subpackaged solid propellant.)

1. The utility model provides a transparent window experimental apparatus of solid propellant oxygen combustion partial shipment coupling burning which characterized in that: comprises an oxygen-rich gas generator and a combustor;

the oxygen-enriched gas generator is of a cavity structure with one closed end, a connecting flange is arranged at the open end, and an ignition seat communicated with the cavity is arranged on the side wall;

according to different experimental requirements, an oxygen-enriched propellant grain or a fake medicine graphite rod is placed in the oxygen-enriched fuel gas generator, the movement of the oxygen-enriched propellant grain or the fake medicine graphite rod is limited through a medicine blocking ring, and the medicine blocking ring does not influence the working of an ignition seat

The combustor is of a hollow structure with two open ends, one end of the combustor is provided with a flange connected with the oxygen-enriched fuel gas generator, and the other end of the combustor is used for installing a spray pipe; the lower part of the hollow inner cavity of the burner is provided with a rectangular groove which is used for placing fuel-rich propellant strips or oxygen-rich propellant strips according to different experimental requirements;

the front side wall and the rear side wall of the combustor are provided with T-shaped cross section transparent windows with small inside and large outside, heat-resistant pressure-resistant transparent media with T-shaped cross sections are hermetically installed in the transparent windows, and the small planes of the heat-resistant pressure-resistant transparent media are in contact with the side walls of the fuel-rich propellant strips or the oxygen-rich propellant strips placed in the rectangular grooves at the lower part of the hollow inner cavity of the combustor;

a transparent window cover plate is further fixed on the outer side of the heat-resistant pressure-resistant transparent medium to limit the heat-resistant pressure-resistant transparent medium to move; a silicon rubber flat gasket sealing ring is arranged between the transparent window cover plate and the heat-resistant and pressure-resistant transparent medium to prevent the heat-resistant and pressure-resistant transparent medium from being crushed by the transparent window cover plate, and the transparent window cover plate is fixedly connected with the combustor;

the flange end of the oxygen-enriched gas generator is hermetically connected with the flange end of the combustor;

the center of the other end of the combustor is provided with a stepped hole with internal threads, an annular graphite gasket is arranged on the stepped surface, the spray pipe is placed on the graphite gasket, sealing between the spray pipe and the combustor is realized through the graphite gasket, the spray pipe is fixed through a spray pipe seat, and the spray pipe seat is in threaded connection with the combustor.

2. The solid propellant oxygen-burning split-charging coupled combustion transparent window experimental device as claimed in claim 1, wherein: the side wall of the medicine blocking ring is provided with a through hole, and through the oxygen-enriched fuel gas generator, the oxygen-enriched propellant grain or the fake medicine graphite rod and the size design of the medicine blocking ring, after the medicine blocking ring is installed, the through hole in the side wall of the medicine blocking ring is aligned with the through hole of the ignition seat, so that the ignition wire can sequentially pass through the through hole in the side wall of the medicine blocking ring and the through hole of the ignition seat.

3. The solid propellant oxygen-burning split-charging coupled combustion transparent window experimental device as claimed in claim 1, wherein: the heat-resistant pressure-resistant transparent medium is quartz glass.

4. The solid propellant oxygen-burning split-charging coupled combustion transparent window experimental device as claimed in claim 1, wherein: the sealing connection relation between the heat-resistant pressure-resistant transparent medium and the transparent window is as follows: the method comprises the steps of placing a silicone rubber flat gasket sealing ring with a rectangular outline on a step surface of a transparent window on the side wall of a combustor, placing a T-shaped heat-resistant pressure-resistant transparent medium in the transparent window, wherein the step surface of the heat-resistant pressure-resistant transparent medium and the step surface of the transparent window on the side wall of the combustor are respectively contacted with two side surfaces of the silicone rubber flat gasket sealing ring, and the small plane of the heat-resistant pressure-resistant transparent medium is contacted with the side wall of a fuel-rich propellant powder strip or an oxygen-rich propellant powder strip placed in a rectangular groove at the lower part of a hollow inner cavity of the combustor.

5. The solid propellant oxygen-burning split-charging coupled combustion transparent window experimental device as claimed in claim 1, wherein: the process of placing the silicone rubber flat gasket sealing ring between the transparent window cover plate and the heat-resistant pressure-resistant transparent medium comprises the following steps: the method comprises the steps of placing a silicone rubber flat gasket seal ring with a rectangular outline on a large plane of a heat-resistant and pressure-resistant transparent medium, respectively installing transparent window cover plates on the side walls of a combustor, respectively enabling step surfaces on the side walls of the transparent window cover plates and the large plane of the heat-resistant and pressure-resistant transparent medium to be in contact with two side surfaces of the silicone rubber flat gasket seal ring, and fixing the transparent window cover plates on the side walls of the combustor through screws.

6. The method for carrying out the experiment by using the solid propellant oxygen combustion subpackage coupled combustion transparent window experiment device as defined in any one of claims 1 to 5, is characterized in that: when the split charging coupled combustion refined diagnosis experiment of the oxygen-enriched propellant and the rich propellant is carried out, the oxygen-enriched propellant grains are loaded into the cavity of the oxygen-enriched propellant generator, the rich propellant grains are placed in the rectangular groove of the combustor, high-temperature fuel gas generated by combustion of the oxygen-enriched propellant flows through the surfaces of the rich propellant grains and is mixed and combusted with the rich propellant gas again, final fuel gas after combustion flows through the spray pipe, the flow of the fuel gas can be limited through the throat diameter of the spray pipe, the pressure of the combustion chamber is controlled, the pressure of the combustion chamber can be adjusted by changing the spray pipes with different throat diameters, and then the split charging coupled combustion refined diagnosis experiment research of the oxygen-enriched propellant and the rich propellant can be carried out.

7. The method for carrying out the experiment by using the solid propellant oxygen combustion subpackage coupled combustion transparent window experiment device as defined in any one of claims 1 to 5, is characterized in that: when a self-sustaining combustion fine diagnosis experiment is carried out under the condition of constant pressure of the oxygen-enriched propellant, a fake medicine graphite rod is loaded into a cavity of the oxygen-enriched propellant generator, and oxygen-enriched propellant medicine strips are placed in rectangular grooves of a combustor; the firing cable is led to the oxygen-enriched propellant for ignition, the gas flow is limited through the throat diameter of the spray pipe, so that the pressure intensity of the combustion chamber is kept constant, and further the self-sustaining combustion fine diagnosis research of the oxygen-enriched propellant under the constant pressure condition is carried out; by changing the throat diameter of the spray pipe, the constant-pressure self-sustaining combustion fine diagnosis of the oxygen-enriched propellant under different pressure intensity conditions can be realized.

8. The method for carrying out the experiment by using the solid propellant oxygen combustion subpackage coupled combustion transparent window experiment device as defined in any one of claims 1 to 5, is characterized in that: when a self-sustaining combustion fine diagnosis experiment is carried out under the boosting condition of the oxygen-enriched propellant, a fake medicine graphite rod is loaded into a cavity of the oxygen-enriched propellant generator, and oxygen-enriched propellant medicine strips are placed in rectangular grooves of a combustor; the firing cable is led to the oxygen-enriched propellant for ignition, the throat-free spray pipe is adopted, the combustion chamber is sealed and does not exhaust to the outside, the pressure of the combustion chamber is gradually increased by high-temperature gas generated by combustion of the oxygen-enriched propellant, and therefore the self-sustaining combustion fine diagnosis research of the oxygen-enriched propellant under the boosting condition is developed.

Technical Field

The invention relates to the field of solid rocket engines and propellant combustion diagnosis, in particular to a solid propellant oxygen combustion split charging coupled combustion transparent window experimental device and an experimental method.

Background

The solid rocket engine has the advantages of simple structure, higher density specific impulse, high working reliability, easy long-term storage and the like, however, for the traditional solid rocket engine, when the propellant formula and the grain configuration are fixed, the thrust output mode of the traditional solid rocket engine is also fixed. The common single-chamber double-thrust or double-pulse engine can only output continuous or discontinuous two-stage fixed thrust, cannot realize synchronous active regulation and control of a thrust value and regulation time, and limits the autonomous maneuvering capability of the missile. In addition, the oxidizer and the fuel are uniformly mixed and prepared into a propellant grain with a certain shape, and at the moment, the propellant meeting the proper oxygen-fuel ratio has the danger of being inflammable and the like.

The solid oxidant and the solid fuel are respectively prepared into the oxygen-enriched propellant and the fuel-enriched propellant which are respectively arranged in the oxygen-enriched combustion chamber and the fuel-enriched combustion chamber, thereby designing the oxygen-enriched split charging combined solid engine. The combined engine technology integrates the advantages of a solid ramjet engine and a solid-liquid hybrid rocket engine, not only improves the thrust adjusting capability of the engine, but also ensures that the propellant process is hardly limited by the flying height and the flying speed, and simultaneously, the safety and the reliability of the engine are obviously improved. However, the existing oxygen-enriched propellant and the oxygen-enriched propellant are self-sustaining combustion, and the coupled combustion mechanism between the oxygen-enriched gas and the oxygen-enriched propellant is seriously lacked, so that the oxygen-enriched split charging combined engine has the problems of low combustion efficiency, poor combustion speed and thrust regulation effect and the like, and cannot be practically applied. Therefore, the experimental device for designing the solid propellant oxygen combustion subpackage coupled combustion transparent window is a necessary condition for developing the self-sustaining combustion of the oxygen-enriched propellant and the rich propellant and the coupled combustion mechanism research between the oxygen-enriched propellant and the rich propellant.

The invention relates to a solid fuel diffusion combustion refined diagnosis burner, which has the following patent numbers: CN201910609601.5 discloses a solid fuel diffusion combustion refined diagnosis burner, which comprises a combustion chamber, a combustion chamber top cover and an ignition seat device, wherein the air inlet wall surface of the combustion chamber is provided with a first stepped through hole for coaxially installing an air inlet cavity; a second step through hole is formed in the air outlet wall surface of the combustion chamber and used for installing a spray pipe; windows are formed in the two side wall surfaces of the combustion chamber, and quartz glass is fixed to the windows of the combustion chamber through a glass cover plate and used for observing the combustion process of the rocket engine in real time; the bottom surface of the combustion chamber and the combustion chamber top cover are both provided with charge grooves, a second heat insulation layer is arranged in each charge groove, and solid fuel is fixed on the second heat insulation layer. The charge groove is additionally arranged in the combustion chamber to enhance the mixing degree between the oxidant and the fuel, so that the utilization rate of the fuel to oxygen in the combustion process is improved; the nozzle throttling device is additionally arranged, nozzles with different throat diameters are replaced according to different requirements, and the influence of the pressure of the combustion chamber on the diffusion combustion of the solid fuel can be effectively analyzed. The combustor is only suitable for diffusion combustion fine diagnosis between solid fuel and normal-temperature oxidant airflow, and one end of the combustor disclosed by the invention patent is a through hole connected with an oxidant flow pipeline, so that the combustor cannot be used in a self-sustaining combustion fine diagnosis experiment of the oxygen-enriched propellant in the oxygen-combustion split-charging solid propellant.

Disclosure of Invention

The invention provides a transparent window experimental apparatus for oxygen-fired subpackage coupled combustion of a solid propellant, aiming at the problem that a combustor in the prior art is only suitable for coupled combustion refined diagnosis experiment requirements between a solid fuel and an external oxidant flow and cannot meet the requirements of self-sustaining combustion of an oxygen-enriched propellant in the oxygen-fired subpackage solid propellant and coupled combustion refined diagnosis experiment research requirements of the oxygen-enriched propellant and the oxygen-enriched propellant in the oxygen-fired subpackage solid propellant.

The technical scheme of the invention is as follows:

the transparent window experimental apparatus for the oxygen-fuel split-charging coupled combustion of the solid propellant comprises an oxygen-rich fuel gas generator and a combustor;

the oxygen-enriched gas generator is of a cavity structure with one closed end, a connecting flange is arranged at the open end, and an ignition seat communicated with the cavity is arranged on the side wall;

according to different experimental requirements, an oxygen-enriched propellant grain or a fake medicine graphite rod is placed in the oxygen-enriched fuel gas generator, the movement of the oxygen-enriched propellant grain or the fake medicine graphite rod is limited through a medicine blocking ring, and the medicine blocking ring does not influence the working of an ignition seat

The combustor is of a hollow structure with two open ends, one end of the combustor is provided with a flange connected with the oxygen-enriched fuel gas generator, and the other end of the combustor is used for installing a spray pipe; the lower part of the hollow inner cavity of the burner is provided with a rectangular groove which is used for placing fuel-rich propellant strips or oxygen-rich propellant strips according to different experimental requirements;

the front side wall and the rear side wall of the combustor are provided with T-shaped cross section transparent windows with small inside and large outside, heat-resistant pressure-resistant transparent media with T-shaped cross sections are hermetically installed in the transparent windows, and the small planes of the heat-resistant pressure-resistant transparent media are in contact with the side walls of the fuel-rich propellant strips or the oxygen-rich propellant strips placed in the rectangular grooves at the lower part of the hollow inner cavity of the combustor;

a transparent window cover plate is further fixed on the outer side of the heat-resistant pressure-resistant transparent medium to limit the heat-resistant pressure-resistant transparent medium to move; a silicon rubber flat gasket sealing ring is arranged between the transparent window cover plate and the heat-resistant and pressure-resistant transparent medium to prevent the heat-resistant and pressure-resistant transparent medium from being crushed by the transparent window cover plate, and the transparent window cover plate is fixedly connected with the combustor;

the flange end of the oxygen-enriched gas generator is hermetically connected with the flange end of the combustor;

the center of the other end of the combustor is provided with a stepped hole with internal threads, an annular graphite gasket is arranged on the stepped surface, the spray pipe is placed on the graphite gasket, sealing between the spray pipe and the combustor is realized through the graphite gasket, the spray pipe is fixed through a spray pipe seat, and the spray pipe seat is in threaded connection with the combustor.

Furthermore, it has the through-hole to keep off medicine ring lateral wall to open, through oxygen-enriched gas generator, oxygen-enriched propellant powder post or fake medicine graphite rod and the size design that keeps off the medicine ring for keep off the medicine ring installation back, keep off the through-hole on the medicine ring lateral wall and align with the through-hole of ignition seat, make the ignition line can pass the through-hole on keeping off the medicine ring lateral wall and the through-hole of ignition seat in proper order.

Further, the heat-resistant and pressure-resistant transparent medium is quartz glass.

Further, the sealing connection relationship between the heat-resistant pressure-resistant transparent medium and the transparent window is as follows: the method comprises the steps of placing a silicone rubber flat gasket sealing ring with a rectangular outline on a step surface of a transparent window on the side wall of a combustor, placing a T-shaped heat-resistant pressure-resistant transparent medium in the transparent window, wherein the step surface of the heat-resistant pressure-resistant transparent medium and the step surface of the transparent window on the side wall of the combustor are respectively contacted with two side surfaces of the silicone rubber flat gasket sealing ring, and the small plane of the heat-resistant pressure-resistant transparent medium is contacted with the side wall of a fuel-rich propellant powder strip or an oxygen-rich propellant powder strip placed in a rectangular groove at the lower part of a hollow inner cavity of the combustor.

Further, the process of placing the silicone rubber flat gasket sealing ring between the transparent window cover plate and the heat-resistant pressure-resistant transparent medium comprises the following steps: the method comprises the steps of placing a silicone rubber flat gasket seal ring with a rectangular outline on a large plane of a heat-resistant and pressure-resistant transparent medium, respectively installing transparent window cover plates on the side walls of a combustor, respectively enabling step surfaces on the side walls of the transparent window cover plates and the large plane of the heat-resistant and pressure-resistant transparent medium to be in contact with two side surfaces of the silicone rubber flat gasket seal ring, and fixing the transparent window cover plates on the side walls of the combustor through screws.

Furthermore, when the split charging coupled combustion refined diagnosis experiment of the oxygen-enriched propellant and the rich propellant is carried out, the oxygen-enriched propellant grains are loaded into the cavity of the oxygen-enriched propellant generator, the rich propellant grains are placed in the rectangular groove of the combustor, high-temperature fuel gas generated by combustion of the oxygen-enriched propellant flows through the surfaces of the rich propellant grains and is mixed and combusted with the rich propellant gas again, final fuel gas after combustion flows through the spray pipe, the flow of the fuel gas can be limited through the throat diameter of the spray pipe, the pressure of the combustion chamber is controlled, the pressure of the combustion chamber can be adjusted by changing the spray pipes with different throat diameters, and then the split charging coupled combustion refined diagnosis experiment research of the oxygen-enriched propellant and the rich propellant can be carried out.

Further, when a self-sustaining combustion fine diagnosis experiment is carried out under the condition of constant pressure of the oxygen-enriched propellant, a fake medicine graphite rod is arranged in a cavity of the oxygen-enriched propellant generator, and oxygen-enriched propellant medicine strips are placed in a rectangular groove of the combustor; the firing cable is led to the oxygen-enriched propellant for ignition, the gas flow is limited through the throat diameter of the spray pipe, so that the pressure intensity of the combustion chamber is kept constant, and further the self-sustaining combustion fine diagnosis research of the oxygen-enriched propellant under the constant pressure condition is carried out; by changing the throat diameter of the spray pipe, the constant-pressure self-sustaining combustion fine diagnosis of the oxygen-enriched propellant under different pressure intensity conditions can be realized.

Further, when a self-sustaining combustion fine diagnosis experiment is carried out under the boosting condition of the oxygen-enriched propellant, a fake medicine graphite rod is arranged in a cavity of the oxygen-enriched propellant generator, and oxygen-enriched propellant medicine strips are placed in rectangular grooves of the combustor; the firing cable is led to the oxygen-enriched propellant for ignition, the throat-free spray pipe is adopted, the combustion chamber is sealed and does not exhaust to the outside, the pressure of the combustion chamber is gradually increased by high-temperature gas generated by combustion of the oxygen-enriched propellant, and therefore the self-sustaining combustion fine diagnosis research of the oxygen-enriched propellant under the boosting condition is developed.

Advantageous effects

The invention has the following beneficial effects:

(1) the oxygen-enriched propellant to be tested is filled in the oxygen-enriched propellant generator, and the oxygen-enriched propellant to be tested is placed in the rectangular groove of the combustor cavity with the transparent window, so that the oxygen-enriched propellant and the oxygen-enriched propellant can be separately packaged, coupled and combusted to be subjected to a fine diagnosis experiment research.

(2) The quartz glass is tightly attached to the side wall of the fuel strip of the fuel-rich propellant to be detected, so that oxygen-rich fuel gas can be prevented from flowing through the two side walls of the fuel-rich propellant, and the quasi-two-dimensional combustion surface moving of the fuel-rich propellant can be realized.

(3) The fake medicine graphite rod is filled in the oxygen-enriched combustor generator, and the oxygen-enriched propellant medicine strip to be tested is placed in the rectangular groove of the combustor cavity with the transparent window, so that the oxygen-enriched propellant self-sustaining combustion fine diagnosis experimental study under the constant pressure condition can be realized. The same principle can also be used for the fine diagnosis experiment research of the self-sustaining combustion of the rich-burn propellant under the condition of constant pressure.

(4) Through changing the spray pipes with different throat diameters, the solid propellant oxygen-combustion split charging coupled combustion transparent window experimental apparatus can be used for researching the constant-pressure coupled combustion characteristic of the oxygen-enriched propellant and the rich propellant under different combustion chamber pressures, the constant-pressure self-sustaining combustion characteristic of the oxygen-enriched propellant and the constant-pressure self-sustaining combustion characteristic of the rich propellant.

(5) Through changing the no-hole spray pipe, the solid propellant oxygen combustion split charging coupled combustion transparent window experimental device can be used for the boosting self-sustaining combustion characteristic fine diagnosis research of the oxygen-enriched propellant in the closed combustor, and also can be used for the self-sustaining combustion fine diagnosis experimental research of the oxygen-enriched propellant under the constant pressure condition.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a front view of a transparent window tester for oxygen-combustion, split-charging and coupled combustion of solid propellant;

FIG. 2 is a main sectional view of a transparent window tester for oxygen-fuel split-charging coupled combustion of a solid propellant;

FIG. 3 is a main sectional view of a transparent window tester for oxygen-fuel split-charging coupled combustion of a solid propellant;

FIG. 4 is a top plan view of the oxygen-enriched gasifier with an ignition seat;

FIG. 5 is a front sectional view of the oxygen-enriched gasifier with an ignition seat;

FIG. 6 is a right side view of the oxygen-enriched gas generator with the ignition seat;

FIG. 7 is a front sectional view and a left side view of the drug retaining ring;

FIG. 8 is a front and left side view of a pseudodrug graphite rod;

FIG. 9 is a front view of a burner with transparent windows on both front and rear sides;

FIG. 10 is a left side view of the burner with transparent windows on both the front and back sides;

FIG. 11 is a top view of a burner with transparent windows on both front and back sides;

FIG. 12 is a front cross-sectional view of a burner with transparent windows on both the front and rear sides;

FIG. 13 is a top cross-sectional view of a burner with transparent windows on both the front and back sides;

FIG. 14 is a front and left sectional view of a transparent window cover panel;

FIG. 15 is a front view and a left sectional view of a silica glass;

FIG. 16 is a top view of a quartz glass;

FIG. 17 is a front sectional view and a left side view of the spout;

FIG. 18 is a top view of the nozzle base;

FIG. 19 is a front cross-sectional view and a left side view of the nozzle base;

fig. 20 is a front view and a left sectional view of a silicone rubber flat gasket seal ring.

In the figure:

the oxygen-enriched fuel gas burner comprises an oxygen-enriched fuel gas generator 1, an ignition seat 2, a bolt 3, a burner 4, a transparent window cover plate 5, a pressure measuring seat 6, a nozzle seat 7, a screw 8, a fake medicine graphite rod 9, a medicine blocking ring 10, a silicon rubber O-shaped ring 11, an oxygen-enriched fuel gas strip 12, a graphite gasket 13, a nozzle 14, an oxygen-enriched fuel gas column 15, a fuel gas strip 16, quartz glass 17 and a silicon rubber flat gasket sealing ring 18.

Detailed Description

The invention is used for oxygen-enriched propellant self-sustaining combustion fine diagnosis experiments and oxygen-enriched propellant and rich propellant split charging coupled combustion fine diagnosis experiments, and the detailed structure of the solid propellant oxygen combustion split charging coupled combustion transparent window experiment device is given by the attached drawing.

The invention relates to a transparent window experimental apparatus for oxygen-fuel split charging coupled combustion of a solid propellant, which mainly comprises an oxygen-enriched fuel gas generator 1 with an ignition seat, a combustor 4 with transparent windows at the front side and the rear side, a medicine blocking ring 10, quartz glass 17, a transparent window cover plate 5, a silicon rubber flat gasket sealing ring 18, a silicon rubber O-shaped ring 11, a graphite gasket 13, a fake medicine graphite rod 9, a screw 8, a bolt 3, a spray pipe 14 and a spray pipe seat 7.

When the fine diagnosis experiment of the split charging coupled combustion of the oxygen-enriched propellant and the fuel-enriched propellant is carried out:

the method comprises the steps of loading an oxygen-enriched propellant grain 15 to be tested into a cavity of an oxygen-enriched gas generator 1 with an ignition seat, loading a medicine blocking ring 10 into the cavity of the oxygen-enriched gas generator 1 with the ignition seat to limit the movement of the oxygen-enriched propellant, aligning a through hole in the side wall of the medicine blocking ring 10 with a through hole of the ignition seat 2, and enabling an ignition wire to sequentially penetrate through the through hole in the side wall of the medicine blocking ring and the through hole of the ignition seat.

The flange end of the oxygen-enriched gas generator with the ignition seat is connected with the flange end of the combustor with transparent windows at the front side and the rear side and is fastened through 8 bolts, and the flanges are sealed through silicon rubber O-shaped rings. Specifically, the method comprises the following steps: the method comprises the steps of placing a silicon rubber O-shaped ring 11 in an annular groove of a flange of a combustor 4, connecting a flange of an oxygen-enriched fuel generator 1 with an ignition seat and provided with an oxygen-enriched propellant grain 15 and a medicine blocking ring 10 with the flange end of the combustor 4 with transparent windows at the front side and the rear side and provided with the silicon rubber O-shaped ring 11, fixing the oxygen-enriched fuel generator 1 with the combustor 4 through 8 bolts 3, and sealing the flanges through the silicon rubber O-shaped ring 11.

A rectangular groove is arranged in the cavity of the burner 4 with transparent windows at the front and the rear sides, and the propellant-rich chemical strip 16 is arranged in the rectangular groove of the cavity of the burner 4.

Two pieces of quartz glass are placed at the window of the burner 4 with transparent windows at the front and rear sides, and a silicone rubber flat gasket sealing ring is arranged between the quartz glass and the burner, so that the sealing between the quartz glass and the burner is realized through the silicone rubber flat gasket sealing ring. Specifically, the method comprises the following steps: two silicon rubber flat gasket sealing rings 18 with rectangular outlines are respectively placed on the step surfaces of the transparent windows on the side wall of the combustor 4, two pieces of quartz glass 17 with T-shaped sections are placed at the transparent windows on the side wall of the combustor 4, the small planes of the quartz glass 17 are in contact with the side wall of a propellant-rich chemical strip 16, and the step surfaces of the quartz glass 17 and the step surfaces of the window on the side wall of the combustor 4 are in contact with the two side surfaces of the silicon rubber flat gasket sealing rings 18 respectively.

The two transparent window cover plates are respectively covered on the quartz glass at two sides so as to limit the movement of the quartz glass, a silicon rubber flat gasket sealing ring is arranged between the transparent window cover plates and the quartz glass to prevent the transparent window cover plates from crushing the quartz glass, and the transparent window cover plates are connected with the combustor through screws. Specifically, the method comprises the following steps: two silicon rubber flat gasket sealing rings 18 with rectangular outlines are respectively placed on the large planes of two quartz glass 17, two transparent window cover plates 5 are respectively arranged on two side walls of the combustor 4, the step surfaces on the side walls of the transparent window cover plates 5 and the large planes of the quartz glass 17 are respectively contacted with two side surfaces of the silicon rubber flat gasket sealing rings 18, and the two cover plates are respectively fixed on the side walls of the combustor 4 through 28 screws 8. The side wall of the burner 4 is also provided with a pressure measuring seat 6 for collecting the pressure in the burner.

The other end at the combustor is placed to the spray tube, places the graphite gasket between spray tube and combustor and realizes sealing, thereby the spray tube seat is connected with the combustor through the screw and is fixed the spray tube. Specifically, the method comprises the following steps: the annular graphite gasket 13 is placed on the step surface of the root part of the internal thread at the other end of the combustor 4, the spray pipe 14 is placed on the graphite gasket 13, sealing between the spray pipe and the combustor is achieved through the graphite gasket, the spray pipe 14 is fixed through the spray pipe seat 7, and the spray pipe seat 7 is connected with the combustor 4 through threads.

In the experimental process, the quartz glass can be used for carrying out refined combustion diagnosis on the coupled combustion process of the oxygen-enriched propellant and the rich propellant.

When oxygen-enriched propellant self-sustaining combustion fine diagnosis is carried out:

the dummy drug graphite rod 9 is arranged in the cavity of the oxygen-enriched gas generator 1 with the ignition seat, the drug blocking ring 10 is arranged in the cavity of the oxygen-enriched gas generator 1 with the ignition seat to limit the movement of the dummy drug graphite rod, and the through hole on the side wall of the drug blocking ring 10 is aligned with the through hole of the ignition seat 2, so that the ignition wire can sequentially pass through the through hole on the side wall of the drug blocking ring and the through hole of the ignition seat.

The flange end of the oxygen-enriched gas generator with the ignition seat is connected with the flange end of the combustor with transparent windows at the front side and the rear side and is fastened through 8 bolts, and the flanges are sealed through silicon rubber O-shaped rings. Specifically, a silicon rubber O-ring 11 is placed in an annular groove of a flange of a combustor 4, the flange of the oxygen-enriched fuel generator 1 provided with a fake medicine graphite rod 9 and a medicine blocking ring 10 is connected with the combustor 4 provided with the silicon rubber O-ring 11, and the oxygen-enriched fuel generator 1 and the combustor 4 are fixed through 8 bolts 3.

A rectangular groove is arranged in the chamber of the burner with transparent windows at the front and the rear sides, and the oxygen-enriched propellant medicine strip 12 is placed in the rectangular groove of the cavity of the burner 4.

Two pieces of quartz glass are placed at the window of the burner with transparent windows at the front side and the rear side, a silicon rubber flat gasket sealing ring is arranged between the quartz glass and the burner, and the sealing between the quartz glass and the burner is realized through the silicon rubber flat gasket sealing ring. Specifically, the method comprises the following steps: two silicon rubber flat gasket sealing rings 18 with rectangular outlines are respectively placed on the step surfaces of windows on the side wall of the combustor 4, two pieces of quartz glass 17 with T-shaped sections are placed at the windows on the side wall of the combustor 4, the small planes of the quartz glass 17 are in contact with the side wall of the oxygen-enriched propellant medicine strip 12, and the step surfaces of the quartz glass 17 and the step surfaces of the windows on the side wall of the combustor 4 are in contact with the two side surfaces of the silicon rubber flat gasket sealing rings 18 respectively.

The two transparent window cover plates are respectively covered on the quartz glass at two sides so as to limit the movement of the quartz glass, a silicon rubber flat gasket sealing ring is arranged between the transparent window cover plates and the quartz glass to prevent the transparent window cover plates from crushing the quartz glass, and the transparent window cover plates are connected with the combustor through screws. Specifically, the method comprises the following steps: two silicon rubber flat gasket sealing rings 18 with rectangular outlines are respectively placed on the large planes of two quartz glass 17, two transparent window cover plates 5 are respectively arranged on two side walls of the combustor 4, the step surfaces on the side walls of the transparent window cover plates 5 and the large planes of the quartz glass 17 are respectively contacted with two side surfaces of the silicon rubber flat gasket sealing rings 18, and the two cover plates are respectively fixed on the side walls of the combustor 4 through 28 screws 8.

The other end at the combustor flange is placed to the spray tube, places the graphite gasket between spray tube and combustor and realizes sealing, thereby the spray tube seat is connected with the combustor through the screw and is fixed the spray tube. Specifically, the method comprises the following steps: the annular graphite gasket 13 is placed on the step surface of the root part of the internal thread at the other end of the combustor 4, the spray pipe 14 is placed on the graphite gasket 13, sealing between the spray pipe and the combustor is achieved through the graphite gasket, the spray pipe 14 is fixed through the spray pipe seat 7, and the spray pipe seat 7 is connected with the combustor 4 through threads. In the experimental process, the oxygen-enriched propellant self-sustaining combustion process can be subjected to refined combustion diagnosis through quartz glass.

When the fine diagnosis of the self-sustaining combustion of the rich propellant is carried out, the oxygen-enriched propellant medicine strip 12 when the fine diagnosis of the self-sustaining combustion of the rich propellant is carried out is replaced by a rich propellant medicine strip 16.

The invention is further described below with reference to three examples:

the first embodiment is as follows:

the embodiment is a burner for developing a fine diagnosis experiment of the split charging coupled combustion of an oxygen-enriched propellant and a fuel-enriched propellant.

An oxygen-enriched propellant grain with the length multiplied by the diameter of 60mm multiplied by 80mm is arranged in an oxygen-enriched fuel generator with the cavity diameter of 80mm, a medicine blocking ring with the length multiplied by the outer diameter multiplied by the inner diameter of 50mm multiplied by 80mm multiplied by 60mm is arranged in the cavity of the oxygen-enriched fuel generator, and a through hole with the diameter of 3mm on the side wall of the medicine blocking ring is aligned with a through hole with the diameter of 3mm of an ignition seat.

The method comprises the steps of placing a silicon rubber O-shaped ring with the outer diameter multiplied by the section diameter of 124mm multiplied by 5mm in an annular groove of a combustor flange, wherein the outer diameter of the annular groove is 126mm, the inner diameter of the annular groove is 112mm, connecting an oxygen-enriched fuel generator provided with an oxygen-enriched propellant grain and a fuel blocking ring with a combustor provided with the silicon rubber O-shaped ring, uniformly distributing 8 bolt holes on the flange, and fixing the oxygen-enriched fuel generator with the combustor through 8M 10 bolts.

Rectangular strips of fuel rich propellant powder 60mm by 30mm by 20mm in length by width by height are placed in rectangular grooves 60mm by 30mm by 10mm in length by width by height of the burner cavity.

Two silicon rubber flat gasket sealing rings with the thickness of 4mm and the rectangular outline are respectively placed on the step surface of the window on the side wall of the combustor, and the rectangular size of each silicon rubber flat gasket sealing ring is the same as that of the step surface of the window on the side wall of the combustor; two pieces of quartz glass with T-shaped sections are placed at a window of the side wall of the combustor, the small planes of the quartz glass are in contact with the side wall of the oxygen-enriched propellant powder strip, and the step surfaces of the quartz glass and the step surface of the window of the side wall of the combustor are in contact with the two side surfaces of the silicon rubber flat gasket sealing ring respectively.

Two silicon rubber flat gasket sealing rings with rectangular outlines are respectively placed on the large planes of two pieces of quartz glass, two transparent window cover plates are respectively arranged on two side walls of the combustor, the step surfaces on the side walls of the transparent window cover plates and the large planes of the quartz glass are respectively contacted with two side surfaces of the silicon rubber flat gasket sealing rings, and the two cover plates are respectively fixed on the side walls of the combustor through 28M 6 multiplied by 1.5 screws.

An annular graphite gasket with the thickness of multiplied by the outer diameter of multiplied by the inner diameter of 2mm multiplied by 33mm multiplied by 10mm is placed on the step surface of the root part of the internal thread at the other end of the combustor, a spray pipe with the throat diameter of 6mm is placed on the other side of the graphite gasket, the seal between the spray pipe and the combustor is realized through the graphite gasket, the spray pipe is fixed through a spray pipe seat, and the spray pipe seat is connected with the combustor through threads.

High-temperature gas generated by combustion of the oxygen-enriched propellant flows through the surface of the fuel strip of the oxygen-enriched propellant and is mixed and combusted with the fuel gas of the oxygen-enriched propellant again, the final gas after combustion flows through the spray pipe, the gas flow can be limited through the throat diameter of the spray pipe, the pressure of the combustion chamber is controlled, the spray pipes with different throat diameters are changed to adjust the pressure of the combustion chamber, and then the split-charging coupled combustion fine diagnosis experimental research of the oxygen-enriched propellant and the oxygen-enriched propellant can be carried out.

Example two:

the embodiment is a burner for a self-sustaining combustion fine diagnosis experiment under the constant pressure condition of an oxygen-enriched propellant.

A fake medicine graphite rod with the length multiplied by the diameter of 60mm multiplied by 80mm is arranged in an oxygen-enriched fuel gas generator with the cavity diameter of 80mm, a medicine blocking ring with the length multiplied by the outer diameter multiplied by the inner diameter multiplied by 50mm multiplied by 80mm multiplied by 60mm is arranged in the cavity of the oxygen-enriched fuel gas generator, and a through hole with the diameter of 3mm on the side wall of the medicine blocking ring is aligned with a through hole with the diameter of 3mm on an ignition seat.

The method comprises the steps of placing a silicon rubber O-shaped ring with the outer diameter multiplied by the section diameter of 124mm multiplied by 5mm in an annular groove of a combustor flange, connecting an oxygen-enriched fuel generator with a fake medicine graphite rod and a medicine blocking ring with a combustor with the silicon rubber O-shaped ring, wherein the outer diameter of the annular groove is 126mm, the inner diameter of the annular groove is 112mm, evenly distributing 8 bolt holes on the flange, and fixing the oxygen-enriched fuel generator with the combustor through 8M 10 bolts.

A cuboid oxygen-enriched propellant medicine strip with the length multiplied by the width multiplied by the height multiplied by 60mm multiplied by 30mm multiplied by 20mm is placed in a rectangular groove with the length multiplied by the width multiplied by 60mm multiplied by 30mm multiplied by 10mm of a combustor cavity.

Two silicon rubber flat gasket sealing rings with the thickness of 4mm and the rectangular outline are respectively placed on the step surface of the window on the side wall of the combustor, and the rectangular size of each silicon rubber flat gasket sealing ring is the same as that of the step surface; two pieces of quartz glass with T-shaped sections are placed at a window of the side wall of the combustor, the small planes of the quartz glass are in contact with the side wall of the oxygen-enriched propellant powder strip, and the step surfaces of the quartz glass and the step surface of the window of the side wall of the combustor are in contact with the two side surfaces of the silicon rubber flat gasket sealing ring respectively.

Two silicon rubber flat gasket sealing rings with rectangular outlines are respectively placed on the large planes of two pieces of quartz glass, two transparent window cover plates are respectively arranged on two side walls of the combustor, the step surfaces on the side walls of the transparent window cover plates and the large planes of the quartz glass are respectively contacted with two side surfaces of the silicon rubber flat gasket sealing rings, and the two cover plates are respectively fixed on the side walls of the combustor through 28M 6 multiplied by 1.5 screws.

An annular graphite gasket with the thickness of multiplied by the outer diameter of multiplied by the inner diameter of 2mm multiplied by 33mm multiplied by 10mm is placed on the step surface of the root part of the internal thread at the other end of the combustor, a spray pipe with the throat diameter of 4mm is placed on the other side of the graphite gasket, the seal between the spray pipe and the combustor is realized through the graphite gasket, the spray pipe is fixed through a spray pipe seat, and the spray pipe seat is connected with the combustor through threads. The ignition wire is led to the oxygen-enriched propellant to be ignited, the gas flow is limited through the throat diameter of the spray pipe, so that the pressure of the combustion chamber is kept constant, and further, the self-sustained combustion fine diagnosis research of the oxygen-enriched propellant under the constant pressure condition is carried out.

Example three:

the embodiment is a burner for a self-sustaining combustion fine diagnosis experiment under the boosting condition of an oxygen-enriched propellant.

A fake medicine graphite rod with the length multiplied by the diameter of 60mm multiplied by 80mm is arranged in an oxygen-enriched fuel gas generator with the cavity diameter of 80mm, a medicine blocking ring with the length multiplied by the outer diameter multiplied by the inner diameter multiplied by 50mm multiplied by 80mm multiplied by 60mm is arranged in the cavity of the oxygen-enriched fuel gas generator, and a through hole with the diameter of 3mm on the side wall of the medicine blocking ring is aligned with a through hole with the diameter of 3mm on an ignition seat.

The method comprises the steps of placing a silicon rubber O-shaped ring with the outer diameter multiplied by the section diameter of 124mm multiplied by 5mm in an annular groove of a combustor flange, connecting an oxygen-enriched fuel generator with a fake medicine graphite rod and a medicine blocking ring with a combustor with the silicon rubber O-shaped ring, wherein the outer diameter of the annular groove is 126mm, the inner diameter of the annular groove is 112mm, evenly distributing 8 bolt holes on the flange, and fixing the oxygen-enriched fuel generator with the combustor through 8M 10 bolts.

A cuboid oxygen-enriched propellant medicine strip with the length multiplied by the width multiplied by the height multiplied by 60mm multiplied by 30mm multiplied by 20mm is placed in a rectangular groove with the length multiplied by the width multiplied by 60mm multiplied by 30mm multiplied by 10mm of a combustor cavity.

Two silicon rubber flat gasket sealing rings with the thickness of 4mm and the rectangular outline are respectively placed on the step surface of the window on the side wall of the combustor, and the rectangular size of each silicon rubber flat gasket sealing ring is the same as that of the step surface; two pieces of quartz glass with T-shaped sections are placed at a window of the side wall of the combustor, the small planes of the quartz glass are in contact with the side wall of the oxygen-enriched propellant powder strip, and the step surfaces of the quartz glass and the step surface of the window of the side wall of the combustor are in contact with the two side surfaces of the silicon rubber flat gasket sealing ring respectively.

Two silicon rubber flat gasket sealing rings with rectangular outlines are respectively placed on the large planes of two pieces of quartz glass, two transparent window cover plates are respectively arranged on two side walls of the combustor, the step surfaces on the side walls of the transparent window cover plates and the large planes of the quartz glass are respectively contacted with two side surfaces of the silicon rubber flat gasket sealing rings, and the two cover plates are respectively fixed on the side walls of the combustor through 28M 6 multiplied by 1.5 screws.

An annular graphite gasket with the thickness of multiplied by the outer diameter of multiplied by the inner diameter of 2mm multiplied by 33mm multiplied by 10mm is placed on the step surface of the root part of the internal thread at the other end of the combustor, a nozzle with the throat diameter of 0mm, namely a throat-free nozzle, is placed on the other side of the graphite gasket, the sealing between the nozzle and the combustor is realized through the graphite gasket, the nozzle is fixed through a nozzle seat, and the nozzle seat is connected with the combustor through threads. The firing cable is led to the oxygen-enriched propellant for ignition, the combustion chamber is sealed without exhausting to the outside due to the fact that the nozzle has no throat, and the pressure of the combustion chamber is gradually increased due to high-temperature gas generated by combustion of the oxygen-enriched propellant, so that fine diagnosis research of self-sustaining combustion of the oxygen-enriched propellant under the boosting condition is carried out. In the experimental process, the safety of the experiment is ensured by controlling the explosive loading amount of the oxygen-enriched propellant explosive strip, and the pressure relief valve is arranged on the combustor to realize the pressure relief work after the experiment.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.