阅读说明：本技术 基于过氧化氢的泵压式发动机起动点火方法及系统 (Pumping pressure type engine starting ignition method and system based on hydrogen peroxide ) 是由 雷娟萍 高强 林革 任勇 雍雪君 于 2021-09-16 设计创作，主要内容包括：本发明属于泵压式发动机起动点火方法及系统,为解决目前具备三次及以上起动能力的泵压式液体火箭发动机,需要额外设置一套高压氦气/氮气供应系统和一套单独的点火剂供应系统,系统复杂且可靠性低,携带大量高压氦气/氮气将给火箭系统造成负担,采用的自燃点火剂由于剧毒且与空气接触会发生自燃,导致使用维护性差的技术问题,提供基于过氧化氢的泵压式发动机起动点火方法及系统,通过氮气对过氧化氢增压,增压后的过氧化氢在催化剂的作用下分解为高温气体,分别驱动涡轮工作和进入推力室待用,涡轮带动同轴相连的氧化剂泵和燃料泵同步工作,对氧化剂和燃料增压,增压后分别进入推力室和燃气发生器。(The invention belongs to a method and a system for starting and igniting a pump-type engine, which aims to solve the technical problems that a set of high-pressure helium/nitrogen supply system and a set of independent igniter supply system are additionally arranged in the conventional pump-type liquid rocket engine with the starting capability of three times or more, the system is complex and low in reliability, a large amount of high-pressure helium/nitrogen carried by the system can cause burden to the rocket system, and the adopted autoignition igniter is extremely toxic and can spontaneously ignite when contacting with air, so that the use and maintenance are poor, and the method and the system for starting and igniting the pump-type engine based on hydrogen peroxide are provided, hydrogen peroxide after pressurization is decomposed into high-temperature gas under the action of a catalyst, a turbine is respectively driven to work and enter a thrust chamber for standby, the turbine drives an oxidant pump and a fuel pump which are coaxially connected to synchronously work, so as to pressurize oxidant and fuel, after being pressurized, the gas respectively enters a thrust chamber and a fuel gas generator.)

1. A method for starting and igniting a hydrogen peroxide-based pump-type engine, comprising the steps of:

s1, pressurizing the hydrogen peroxide through nitrogen, decomposing the pressurized hydrogen peroxide into high-temperature gas under the action of a catalyst, and respectively driving the turbine (4) to work and entering the thrust chamber (8) for later use;

s2, the turbine (4) drives an oxidant pump (7) and a fuel pump (6) which are coaxially connected with the turbine to synchronously work, the oxidant pump (7) and the fuel pump (6) respectively pressurize the oxidant and the fuel, one part of the pressurized oxidant and the pressurized fuel enter a thrust chamber (8), and the other part of the pressurized oxidant and the pressurized fuel enter a fuel gas generator (9);

s3, the high-temperature gas entering the thrust chamber (8) causes the fuel in the thrust chamber (8) to self-ignite, ignites the oxidant and the fuel entering the thrust chamber (8), and causes the thrust chamber (8) to work and generate thrust;

the oxidant and the fuel entering the gas generator (9) are ignited and combusted under the action of high-temperature gas in the turbine (4), and the generated high-temperature gas drives the turbine (4) to continue working until a preset working condition is reached, so that starting ignition is finished.

2. A hydrogen peroxide based pump-type engine start-up ignition system, characterized by: the method for realizing the ignition for the pump engine start based on hydrogen peroxide according to claim 1 comprises an igniter (5), a fuel pump (6), an oxidant pump (7), a thrust chamber (8), a fuel gas generator (9), and a nitrogen gas supply unit (1), a hydrogen peroxide storage tank (2), a starter (3) and a turbine (4) which are communicated in sequence;

the turbine (4), the fuel pump (6) and the oxidant pump (7) are coaxially connected;

the gas generator (9) is communicated with the turbine (4);

the igniter (5) is communicated with a pipeline between the hydrogen peroxide storage tank (2) and the starter (3);

the thrust chamber (8) is communicated with an outlet of the igniter (5), an outlet of the fuel pump (6) and an outlet of the oxidant pump (7);

the outlet of the fuel pump (6) and the outlet of the oxidant pump (7) are both communicated with a fuel gas generator (9);

and a catalyst for catalyzing hydrogen peroxide is arranged in the starter (3) and the igniter (5).

3. The hydrogen peroxide-based pump engine start-up ignition system of claim 2, wherein: the nitrogen supply unit (1) comprises a nitrogen bottle (101), a gas stop valve (102) and a pressure reducing valve (103);

the gas stop valve (102) and the pressure reducing valve (103) are sequentially arranged on a pipeline between the nitrogen cylinder (101) and the hydrogen peroxide storage tank (2).

4. A hydrogen peroxide based pump engine start ignition system as defined in claim 2 or 3 wherein: the starter (3) comprises a catalyst bed (301), a nozzle (302) and an expansion chamber (305) which are communicated in sequence;

the inlet of the catalyst bed (301) is communicated with the hydrogen peroxide storage tank (2);

an orifice (306) or an orifice plate is arranged in the nozzle (302);

the outlet of the expansion chamber (305) is connected with a turbine (4).

5. The hydrogen peroxide-based pump engine start-up ignition system of claim 4, wherein:

the nozzle (302) comprises a first nozzle segment (3021) adjacent to the catalyst bed (1) and a second nozzle segment (3022) adjacent to the expansion chamber (305);

the first nozzle segment (3021) is connected with the catalyst bed (301), and the inner diameter of the first nozzle segment is smaller than the inner diameter of the outlet of the catalyst bed (301) and smaller than the inner diameter of the second nozzle segment (3022), so that an orifice (306) is formed in the inner cavity of the first nozzle segment (3021) or the orifice is used for arranging an orifice plate;

the second nozzle segment (3022) is connected to an expansion chamber (305).

6. The hydrogen peroxide-based pump engine start-up ignition system of claim 5, wherein:

the catalyst bed (301) comprises an inlet section (3011), a reaction section (3012) and an outlet section (3013) which are sequentially arranged from an inlet to an outlet;

the inlet section (3011) is communicated with the hydrogen peroxide storage box (2);

the reaction section (3012) comprises a liquid collecting cavity, a distributing plate, catalyst fillers and a supporting plate which are sequentially arranged from an inlet section (3011) to an outlet section (3013);

the inner diameter of the liquid collection cavity is gradually increased from an inlet section (3011) to an outlet section (3013);

the distribution plate and the support plate are respectively arranged at two ends of the catalyst filler, the distribution plate is arranged at the tail end of the liquid collecting cavity, and the distribution plate and the support plate are both connected with the inner wall of the reaction section;

the outlet section (3013) is connected to a first nozzle section (3021).

7. A hydrogen peroxide based pump-type engine start-up ignition system, characterized by: the method for realizing the hydrogen peroxide-based pump engine starting ignition of claim 1 comprises a fuel pump (6), an oxidant pump (7), a thrust chamber (8), a fuel gas generator (9), and a nitrogen gas supply unit (1), a hydrogen peroxide storage tank (2), a starter (3) and a turbine (4) which are communicated in sequence;

the turbine (4), the fuel pump (6) and the oxidant pump (7) are coaxially connected;

the gas generator (9) is communicated with the turbine (4);

the thrust chamber (8) is communicated with a pipeline between the starter (3) and the turbine (4), an outlet of the fuel pump (6) and an outlet of the oxidant pump (7);

the outlet of the fuel pump (6) and the outlet of the oxidant pump (7) are both communicated with a fuel gas generator (9);

and a catalyst for catalyzing hydrogen peroxide is arranged in the starter (3) and the igniter (5).

8. The hydrogen peroxide-based pump engine start-up ignition system of claim 7, wherein: the nitrogen supply unit (1) comprises a nitrogen bottle (101), a gas stop valve (102) and a pressure reducing valve (103);

the gas stop valve (102) and the pressure reducing valve (103) are sequentially arranged on a pipeline between the nitrogen cylinder (101) and the hydrogen peroxide storage tank (2).

9. The hydrogen peroxide based pump engine start ignition system of claim 7 or 8, wherein: the starter (3) comprises a catalyst bed (301), a nozzle (302) and an expansion chamber (305) which are communicated in sequence;

the inlet of the catalyst bed (301) is connected with the hydrogen peroxide storage tank (2);

an orifice (306) or an orifice plate is arranged in the nozzle (302);

the outlet of the expansion chamber (305) is respectively connected with the thrust chamber (8) and the turbine (4).

10. The hydrogen peroxide-based pump engine start-up ignition system of claim 9, wherein:

the nozzle (302) comprises a first nozzle segment (3021) adjacent to the catalyst bed (1) and a second nozzle segment (3022) adjacent to the expansion chamber (305);

the first nozzle segment (3021) is connected with the catalyst bed (301), and the inner diameter of the first nozzle segment is smaller than the inner diameter of the outlet of the catalyst bed (301) and smaller than the inner diameter of the second nozzle segment (3022), so that an orifice (306) is formed in the inner cavity of the first nozzle segment (3021) or the orifice is used for arranging an orifice plate;

the second nozzle segment (3022) is connected to an expansion chamber (305).

Technical Field

The invention belongs to a pumping pressure type engine starting ignition method and a pumping pressure type engine starting ignition system, and particularly relates to a pumping pressure type engine starting ignition method and a pumping pressure type engine starting ignition system based on hydrogen peroxide.

Background

The launch vehicle, which can be recovered and reused, is widely used due to its low launch cost. Among them, the pumped liquid rocket engine is a key part of such rockets, which has high performance and can be reused.

At present, most of pump type liquid rocket engines are started once, do not have the capability of starting and igniting for multiple times, only a few engines have the capability of starting and igniting for two times, the two-time starting of the engines is realized by respectively installing two powder starters and two powder igniters, but the scheme cannot realize the starting more than three times due to the limitation of the space structure of the engines. In addition, the spontaneous combustion ignition agent for realizing the multiple ignition generally adopts a mixed liquid of triethyl aluminum and triethyl boron which are compatible with kerosene, so that the spontaneous combustion ignition agent is extremely toxic, can generate spontaneous combustion when being contacted with air, and has poor safety and use and maintenance.

Disclosure of Invention

The invention provides a hydrogen peroxide-based pumping type engine starting and igniting method and a system thereof, aiming at solving the technical problems that a pumping type liquid rocket engine with the starting capability of more than three times needs to be additionally provided with a high-pressure helium/nitrogen supply system and a single igniter supply system, the system is complex and low in reliability, a rocket system is burdened by carrying a large amount of high-pressure helium, and the adopted autoignition igniter is extremely toxic and can spontaneously ignite when contacting with air, so that the use and maintenance performance are poor.

In order to achieve the purpose, the invention provides the following technical scheme:

a method for starting and igniting a hydrogen peroxide-based pump-type engine is characterized by comprising the following steps:

s1, pressurizing the hydrogen peroxide by nitrogen, decomposing the pressurized hydrogen peroxide into high-temperature gas under the action of a catalyst, and respectively driving a turbine to work and entering a thrust chamber for later use;

s2, the turbine drives the oxidant pump and the fuel pump which are coaxially connected with the turbine to synchronously work, the oxidant pump and the fuel pump respectively pressurize the oxidant and the fuel, one part of the pressurized oxidant and the pressurized fuel enters the thrust chamber, and the other part of the pressurized oxidant and the pressurized fuel enters the fuel gas generator;

s3, the high temperature gas entering the thrust chamber makes the fuel in the thrust chamber self-ignite, and ignites the oxidant and the fuel entering the thrust chamber, so that the thrust chamber works and generates thrust;

the oxidant and the fuel entering the gas generator are ignited and combusted under the action of high-temperature gas in the turbine, and the generated high-temperature gas drives the turbine to continue working until a preset working condition is reached, so that starting ignition is finished.

The invention also provides a pumping pressure type engine starting ignition system based on hydrogen peroxide, which is characterized in that the pumping pressure type engine starting ignition system based on hydrogen peroxide is used for realizing the pumping pressure type engine starting ignition method based on hydrogen peroxide, and comprises an igniter, a fuel pump, an oxidant pump, a thrust chamber, a fuel gas generator, a nitrogen supply unit, a hydrogen peroxide storage tank, a starter and a turbine which are sequentially communicated;

the turbine, the fuel pump and the oxidant pump are coaxially connected;

the gas generator is communicated with a turbine;

the igniter is communicated with a pipeline between the hydrogen peroxide storage tank and the starter;

the thrust chamber is communicated with an igniter outlet, a fuel pump outlet and an oxidant pump outlet;

the outlet of the fuel pump and the outlet of the oxidant pump are both communicated with the fuel gas generator;

the starter and the igniter are internally provided with a catalyst for catalyzing hydrogen peroxide.

Further, the nitrogen supply unit comprises a nitrogen cylinder, a gas stop valve and a pressure reducing valve;

and the gas stop valve and the pressure reducing valve are sequentially arranged on a pipeline between the nitrogen gas bottle and the hydrogen peroxide storage tank. The nitrogen supply unit of the present invention may also adopt other supply systems, such as other real-time supply systems, and the valve types of the gas shutoff valve and the pressure reducing valve may be appropriately selected according to the system requirements.

Further, the starter may be constructed to include a catalyst bed, a nozzle and an expansion chamber in serial communication;

the inlet of the catalyst bed is communicated with a hydrogen peroxide storage tank;

a throttling hole or a throttling orifice plate is arranged in the nozzle;

the outlet of the expansion chamber is connected with a turbine.

Further, the nozzle comprises a first nozzle segment adjacent the catalyst bed and a second nozzle segment adjacent the expansion chamber;

the first nozzle section is connected with the catalyst bed, and the inner diameter of the first nozzle section is smaller than the inner diameter of the outlet of the catalyst bed and smaller than the inner diameter of the second nozzle section, so that an inner cavity of the first nozzle section forms a throttling hole or is used for arranging a throttling orifice plate;

the second nozzle segment is connected to an expansion chamber. The arrangement of the expansion chamber can enable the high-temperature gas to expand to do work, and the inner cavity of the second nozzle section can be generally arranged to be cylindrical, and the shape of the inner cavity can also be adjusted according to the requirement.

Further, the catalyst bed in the starter structure may adopt a structure that the catalyst bed includes an inlet section, a reaction section and an outlet section which are sequentially arranged from the inlet to the outlet;

the inlet section is communicated with the hydrogen peroxide storage tank;

the reaction section comprises a liquid collecting cavity, a distributing plate, catalyst fillers and a supporting plate which are sequentially arranged from the inlet section to the outlet section;

the inner diameter of the liquid collecting cavity is gradually increased from the inlet section to the outlet section;

the distribution plate and the support plate are respectively arranged at two ends of the catalyst filler, the distribution plate is arranged at the tail end of the liquid collecting cavity, and the distribution plate and the support plate are both connected with the inner wall of the reaction section;

the outlet section is connected to the first nozzle section.

In addition, the invention also provides another pumping type engine starting and igniting system based on hydrogen peroxide, which is characterized in that the pumping type engine starting and igniting method based on hydrogen peroxide is realized, and comprises a fuel pump, an oxidant pump, a thrust chamber, a fuel gas generator, a nitrogen supply unit, a hydrogen peroxide storage tank, a starter and a turbine which are communicated in sequence;

the turbine, the fuel pump and the oxidant pump are coaxially connected;

the gas generator is communicated with a turbine;

the thrust chamber is communicated with a pipeline between the starter and the turbine, a fuel pump outlet and an oxidant pump outlet;

the outlet of the fuel pump and the outlet of the oxidant pump are both communicated with the fuel gas generator;

the starter and the igniter are internally provided with a catalyst for catalyzing hydrogen peroxide. Further, the nitrogen supply unit comprises a nitrogen cylinder, a gas stop valve and a pressure reducing valve;

and the gas stop valve and the pressure reducing valve are sequentially arranged on a pipeline between the nitrogen gas bottle and the hydrogen peroxide storage tank.

Further, the nitrogen supply unit comprises a nitrogen cylinder, a gas stop valve and a pressure reducing valve;

and the gas stop valve and the pressure reducing valve are sequentially arranged on a pipeline between the nitrogen gas bottle and the hydrogen peroxide storage tank.

Further, the starter comprises a catalyst bed, a nozzle and an expansion chamber which are communicated in sequence;

the inlet of the catalyst bed is connected with a hydrogen peroxide storage tank;

a throttling hole or a throttling orifice plate is arranged in the nozzle;

and the outlet of the expansion chamber is respectively connected with the thrust chamber and the turbine.

Further, the nozzle comprises a first nozzle segment adjacent the catalyst bed and a second nozzle segment adjacent the expansion chamber;

the first nozzle section is connected with the catalyst bed, and the inner diameter of the first nozzle section is smaller than the inner diameter of the outlet of the catalyst bed and smaller than the inner diameter of the second nozzle section, so that an inner cavity of the first nozzle section forms a throttling hole or is used for arranging a throttling orifice plate;

the second nozzle segment is connected to an expansion chamber.

Compared with the prior art, the invention has the beneficial effects that:

1. the pumping pressure type engine starting ignition method based on hydrogen peroxide achieves the purpose of starting ignition for multiple times through a simpler starting ignition method, and reagents used in the process are nontoxic, safe and reliable.

2. The invention provides two pumping pressure type engine starting ignition systems based on hydrogen peroxide, one system comprises an igniter, the other system does not need to be provided with the igniter independently, the starter and the igniter both adopt normal-temperature nontoxic hydrogen peroxide as a medium, and compared with the traditional powder starter and the traditional powder igniter, the pumping pressure type engine starting ignition system is easier to realize multiple times of starting and is safer and more reliable. In addition, the scheme of not arranging an igniter has lower cost and simpler system structure.

3. The system of the invention adopts an integrated design idea to meet the requirements of multiple starting and ignition, is simple and reliable, adopts the integrated design of the hydrogen peroxide single-component starter and the igniter, also adopts the liquid starter, has light overall weight and good use and maintenance, and is an ideal engine starting and ignition scheme.

4. The starter can also be used for the igniter function of the generator, and simultaneously realizes the starting of the turbine and the ignition of the generator.

5. The nozzle of the starter is internally provided with the throttling hole or the throttling orifice plate, so that certain pressure drop damping is generated in the flowing process of the hydrogen peroxide decomposition gas, and the possibility of low-frequency oscillation is effectively reduced.

Drawings

FIG. 1 is a schematic diagram of a first embodiment of the present invention;

FIG. 2 is a schematic view of a second embodiment of the present invention;

fig. 3 is a schematic structural diagram of a starter in an embodiment of the present invention.

Wherein, the device comprises a 1-nitrogen supply unit, a 101-nitrogen bottle, a 102-gas stop valve, a 103-pressure reducing valve, a 2-hydrogen peroxide storage tank, a 3-starter, a 301-catalyst bed, a 3011-inlet section, a 3012-reaction section, a 3013-outlet section, a 302-nozzle, a 3021-first nozzle section, a 3022-second nozzle section, a 305-expansion chamber, a 306-throttling hole, a 4-turbine, a 5-igniter, a 6-fuel pump, a 7-oxidant pump, an 8-thrust chamber, a 9-gas generator and an 11-hydrogen peroxide stop valve.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings, and it is obvious that the described embodiments do not limit the present invention.

The invention provides a pumping pressure type engine starting and igniting method based on hydrogen peroxide, and simultaneously provides a pumping pressure type engine starting and igniting system based on hydrogen peroxide, which can realize the method, solves the problems of repeated starting and ignition of the pumping pressure type engine, has simple structure and high reliability, realizes repeated starting and ignition of all reagents used during working without toxicity or pollution, and adopts a simple and reliable system structure.

The starting ignition method of the invention specifically comprises the following steps:

s1, pressurizing the hydrogen peroxide by nitrogen, decomposing the pressurized hydrogen peroxide into high-temperature gas under the action of a catalyst, and respectively driving the turbine 4 to work and entering the thrust chamber 8 for later use;

s2, the turbine 4 drives the oxidant pump 7 and the fuel pump 6 which are coaxially connected with the turbine to synchronously work, the oxidant pump 7 and the fuel pump 6 respectively pressurize the oxidant and the fuel, one part of the pressurized oxidant and the pressurized fuel enters the thrust chamber 8, and the other part of the pressurized oxidant and the pressurized fuel enters the fuel generator 9;

s3, the high-temperature gas entering the thrust chamber 8 causes the fuel in the thrust chamber 8 to self-ignite, and ignites the oxidant and the fuel entering the thrust chamber 8, so that the thrust chamber 8 works and generates thrust;

the oxidant and fuel entering the gas generator 9 are ignited and combusted under the action of high-temperature gas in the turbine 4, and the generated high-temperature gas drives the turbine 4 to continue working until a preset working condition is reached, so that starting and ignition are completed.

Example one

As shown in fig. 1, for the above-mentioned starting ignition method, the present invention provides a hydrogen peroxide-based pump-type engine starting ignition system, which comprises an igniter 5, a fuel pump 6, an oxidizer pump 7, a thrust chamber 8, a gas generator 9, and a nitrogen gas supply unit 1, a hydrogen peroxide storage tank 2, a starter 3 and a turbine 4, which are communicated in sequence. The hydrogen peroxide storage tank 2 is used for storing hydrogen peroxide, and hydrogen peroxide can be provided to a corresponding position of the hydrogen peroxide storage tank 2 through other supply systems. In one embodiment of the present invention, the nitrogen supply unit 1 comprises a nitrogen cylinder 101, a gas stop valve 102 and a pressure reducing valve 103, the gas stop valve 102 and the pressure reducing valve 103 are sequentially disposed on a pipeline between the nitrogen cylinder 101 and the hydrogen peroxide storage tank 2, the gas stop valve 102 can be a high-pressure electromagnetic valve, the high-pressure nitrogen in the nitrogen cylinder 101 is reduced in pressure by the pressure reducing valve 103 and enters the hydrogen peroxide storage tank 2, the hydrogen peroxide in the hydrogen peroxide storage tank 2 is pressurized, the hydrogen peroxide is pressurized and enters the starter 3 and the igniter 5, the hydrogen peroxide is decomposed into high-temperature gas by the catalysts in the starter 3 and the igniter 5, the pipeline at the outlet of the hydrogen peroxide storage tank 2 can be provided with a hydrogen peroxide stop valve 11, when the pressurized hydrogen peroxide needs to enter the starter 3 and the igniter 5, the hydrogen peroxide stop valve 11 is opened, the high-temperature gas in the starter 3 enters the turbine 4 to drive the turbine to work, the high-temperature gas in the igniter 5 enters the thrust chamber 8, the turbine 4, the fuel pump 6 and the oxidant pump 7 are coaxially connected, and the fuel pump 6 and the oxidant pump 7 can synchronously rotate under the driving of the turbine 4. The fuel and the oxidant entering the fuel pump 6 and the oxidant pump 7 are pressurized, and then one part of the pressurized fuel and oxidant enters the thrust chamber 8, the other part of the pressurized fuel and oxidant enters the gas generator 9, and the gas generator 9 is communicated with the turbine 4.

The working principle of the starting ignition system is as follows: when the engine is required to work, firstly, the gas stop valve 102 is opened, the high-pressure nitrogen in the nitrogen cylinder 101 is decompressed by the decompression valve 103 and then enters the hydrogen peroxide storage tank 2, the hydrogen peroxide in the hydrogen peroxide storage tank 2 is pressurized, then, the hydrogen peroxide stop valve 11 is opened, the hydrogen peroxide in the hydrogen peroxide storage tank 2 respectively flows into the igniter 5 and the starter 3 under the pressurization pressure and is decomposed into high-temperature gas under the action of the catalysts in the igniter 5 and the starter 3, wherein the high-temperature gas in the starter 3 enters the inner cavity of the turbine 4 to serve as the rotating turbine 4, the turbine 4 drives the fuel pump 6 and the oxidant pump 7 to work synchronously to pressurize the fuel and the oxidant, one part of the pressurized oxidant and the pressurized fuel enter the fuel generator 9, the other part of the pressurized oxidant and the pressurized fuel enter the thrust chamber 8, the high-temperature gas in the igniter 5 enters the thrust chamber 8 to auto-ignite with the fuel in the thrust chamber 8 and ignite the liquid oxygen serving as the oxidant and the kerosene subsequently entering the fuel, the thrust chamber 8 works and generates thrust. Meanwhile, the oxidant and the fuel entering the gas generator 9 are ignited and combusted under the action of high-temperature gas in a turbine cavity of the turbine 4, the generated high-temperature gas drives the turbine 4 to continue working until the working condition of the engine reaches a certain set value, the hydrogen peroxide stop valve 11 and the gas stop valve 102 are respectively closed, the starting ignition system is started to work, and the engine finishes starting and ignition.

Example two

As shown in fig. 2, a pumping type engine starting ignition system based on hydrogen peroxide differs from the first embodiment of the present invention in that an igniter 5 is not required, hydrogen peroxide in a hydrogen peroxide storage tank 2 enters a starter 3 after being pressurized by a nitrogen supply unit 1, the hydrogen peroxide is decomposed into high-temperature gas by a catalyst in the starter 3, the high-temperature gas is respectively sent to a thrust chamber 8 and a turbine 4, the high-temperature gas entering the turbine 4 drives the turbine to work, and fuel and oxidant entering a fuel pump 6 and an oxidant pump 7 are partially sent to the thrust chamber 8 and partially sent to a fuel gas generator 9 after being pressurized. The cost can be effectively reduced.

For the two embodiments described above, as shown in fig. 3, there is shown a structure of the starter 3, and the starter 3 includes a catalyst bed 301, a nozzle 302, a fuel injection and expansion chamber 305 which are communicated in this order, wherein an inlet of the catalyst bed 301 is connected to the hydrogen peroxide storage tank 2, and an orifice 306 or an orifice plate is provided in the nozzle 302, and the orifice 306 or the orifice plate functions as described above. Also shown is an orifice 306 or orifice plate arrangement, the nozzle 302 comprising a first nozzle segment 3021 adjacent the catalyst bed 1 and a second nozzle segment 3022 adjacent the expansion chamber 305, the first nozzle segment 3021 being connected to the catalyst bed 301 and having an internal diameter smaller than the internal diameter of the outlet of the catalyst bed 301 and smaller than the internal diameter of the second nozzle segment 3022, such that the internal cavity of the first nozzle segment 3021 forms the orifice 306 or is used to provide an orifice plate and the second nozzle segment 3022 is connected to the expansion chamber 305. The structure of the starter 3 is applicable to both the first embodiment in which the outlet of the expansion chamber 305 is connected to the turbine 4 and the second embodiment in which the outlet of the expansion chamber 305 is connected to both the turbine 4 and the thrust chamber 8.

In addition, the catalyst bed 1 can include an inlet section 3011, a reaction section 3012 and an outlet section 3013 sequentially arranged from an inlet to an outlet, the inlet section 3011 is connected with the hydrogen peroxide storage tank 2 and is used for injecting hydrogen peroxide, the reaction section 3012 includes a liquid collecting cavity, a distributing plate, catalyst fillers and a supporting plate sequentially arranged from the inlet section 3011 to the outlet section 3013, the inner diameter of the liquid collecting cavity is gradually increased from the inlet section to the outlet section, the distributing plate and the supporting plate are respectively arranged at two ends of the catalyst fillers, the distributing plate is arranged at the tail end of the liquid collecting cavity, the distributing plate and the supporting plate are both connected with the inner wall of the reaction section 3012, the liquid collecting cavity and the distributing plate enable hydrogen peroxide to uniformly enter the catalyst fillers, the distributing plate has a certain aperture ratio and can form a certain pressure drop, a damping effect is achieved in the system, the catalyst fillers promote catalytic decomposition of hydrogen peroxide, and a proper catalyst can be selected according to the concentration of hydrogen peroxide, for example, the catalyst is below 90% and contains 90% of optional silver mesh catalyst, the catalyst is above 90% and ceramic-based catalyst, and the support plate is used for supporting the catalyst filler, so that the catalyst filler has enough rigidity in high-temperature environment. The outlet section 3013 is connected to the first nozzle section 3021. In other embodiments of the present invention, the catalyst bed 301 may be configured in other structures that can be used for catalyzing hydrogen peroxide.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.