阅读说明：本技术 一种主动热混流红外隐蔽结构 (Active heat mixed flow infrared hidden structure ) 是由 李志昕 王勇 于 2020-05-07 设计创作，主要内容包括：本发明提供一种主动热混流红外隐蔽结构,主要由混流换热体、主动进气涡轮、红外抑制壳体、反射罩组成；混流换热体由内圆筒、边界层混动喷射器、转捩湍流混合器和主动进风涡轮组成；边界层混动喷射器由尾气进气管、进气锥管、端板支架A、导流喷管、端板支架B和混流进气管组成；转捩湍流混合器由端板支架C、扩散器、端板支架D、扰流板、排气锥管、排气管组成；通过主动能量把环境中大量的冷空气吸入装置内部与高温尾气混流降温,迅速把发动机尾气温度降低消除红外特征实现红外隐藏的功能。(The invention provides an active heat mixed flow infrared hidden structure which mainly comprises a mixed flow heat exchange body, an active air inlet turbine, an infrared suppression shell and a reflecting cover, wherein the mixed flow heat exchange body is provided with a heat exchange cavity; the mixed flow heat exchange body consists of an inner cylinder, a boundary layer mixed flow ejector, a transition turbulent flow mixer and a driving air inlet turbine; the boundary layer mixed ejector consists of a tail gas inlet pipe, an air inlet taper pipe, an end plate bracket A, a flow guide spray pipe, an end plate bracket B and a mixed flow inlet pipe; the transition turbulent mixer consists of an end plate bracket C, a diffuser, an end plate bracket D, a spoiler, an exhaust taper pipe and an exhaust pipe; a large amount of cold air in the environment is sucked into the device through active energy and mixed with high-temperature tail gas to be cooled, and the temperature of the tail gas of the engine is rapidly reduced to eliminate infrared characteristics so as to realize the infrared hiding function.)

1. An active heat mixed flow infrared hidden structure is characterized in that the structure mainly comprises a mixed flow heat exchange body, an active air inlet turbine, an infrared suppression shell and a reflecting cover;

the mixed flow heat exchange body consists of an inner cylinder, a boundary layer mixing ejector, a transition turbulent mixer and a driving air inlet turbine; the boundary layer hybrid ejector is tightly sleeved at one end of the inner cylinder and comprises a tail gas inlet pipe, an air inlet taper pipe, an end plate support A, a flow guide spray pipe, an end plate support B and a mixed flow inlet pipe, wherein the rear end of the tail gas inlet pipe is connected with a small opening of the air inlet taper pipe, the bottom of the air inlet taper pipe is connected with the end plate support A, the hollow through flow guide spray pipe connects the two end plate supports through opposite through holes on the end plate support A and the end plate support B and enables two outer side spaces of the two end plate supports to be communicated, through holes are also formed in the positions of other plate surfaces on the end plate support B except the through holes connected with the flow guide spray pipe, and the mixed flow inlet pipe penetrates through the inner cylinder to be connected between cavities formed by the end plate support A and the end plate support B of the boundary layer hybrid ejector and; the transition turbulent flow mixer is tightly sleeved at the other end of the inner cylinder and consists of an end plate support C, a diffuser, an end plate support D, a spoiler, an exhaust cone pipe and an exhaust pipe, wherein the hollow through diffuser connects the two end plate supports through opposite through holes on the end plate support C and the end plate support D and enables two outer side spaces of the two end plate supports to be communicated so that air flow can circulate without obstruction; a condensed water chamber is arranged at the lowest part of an inner cavity of a mixed flow heat exchange body consisting of the boundary layer mixed flow ejector, the transition turbulent flow mixer and the inner cylinder, and a water level limiting pipe is arranged at the position higher than the bottom of the condensed water chamber;

the driving air inlet turbine is arranged at the inlet end of the mixed flow air inlet pipe;

the infrared inhibition shell consists of a shielding layer shell and a composite shielding layer, the composite shielding layer is tightly attached to the periphery of the mixed flow heat exchange body and fully covers the mixed flow heat exchange body to insulate heat and preserve heat, the periphery of the composite shielding layer is matched with an upper shielding layer shell to serve as a protective shell of the technical structure of the invention, and a mixed flow air inlet pipe, a tail gas inlet pipe and an exhaust pipe of the mixed flow heat exchange body penetrate through the infrared inhibition shell to be directly communicated with the outside;

the reflection cover is arranged on the upper part of the periphery of the infrared suppression shell.

2. The active thermal mixing infrared covert structure of claim 1, wherein: the flow guide spraying pipe of the boundary layer mixing ejector is a hollow through pipe with a conical hole at one end, the conical hole is positioned at one side connected with the through hole of the end plate support B, the area range of the connection between the flow guide spraying pipe and the end plate support A is not more than the bottom range of the air inlet conical pipe, and through holes are formed in the positions of the other plate surfaces of the end plate support B except the through hole connected with the flow guide spraying pipe.

3. The active thermal mixing infrared covert structure of claim 1, wherein: the contraction pipes and the diffusion pipes at the two ends of the diffuser are conical reducing pipes, the diameters of the pipes are from small to large, and the large openings of the pipes face outwards.

4. The active thermal mixing infrared covert structure of claim 1, wherein: the boundary layer mixing ejector and the transition turbulent mixer are tightly sleeved in the inner cylinder, the tapered orifice end of the flow guide spray pipe of the boundary layer mixing ejector is opposite to the contraction pipe end of the diffuser of the transition turbulent mixer, the center of the tapered orifice of the flow guide spray pipe and the center of the contraction pipe of the diffuser are on the same axis, the two are same in number and paired, and the pairing number is at least one group.

5. The active thermal mixing infrared covert structure of claim 1, wherein: the cylinder body of the inner cylinder is fully provided with through holes, and condensed water in a condensed water chamber at the lowest part of the inner cavity of the mixed flow heat exchange body infiltrates into the composite shielding layer through the through holes.

6. The active thermal mixing infrared covert structure of claim 1, wherein: the quantity of the mixed flow air inlet pipe is at least one, the driving air inlet turbine arranged in the mixed flow air inlet pipe is matched with the mixed flow air inlet pipe, and the quantity of the mixed flow air inlet pipe is at least one.

7. The active thermal mixing infrared covert structure of claim 1, wherein: the outlet direction of the exhaust pipe is vertical to the ground.

8. The active thermal mixing infrared covert structure of claim 1, wherein: the water level limiting pipe penetrates through the infrared suppression shell to be communicated with the external environment, and the pipe orifice does not exceed the surface of the shielding shell.

9. The active thermal mixing infrared covert structure of claim 1, wherein: the composite shielding layer is made of a flexible heat-insulating material which is resistant to high and low temperatures and has water absorption and sound absorption functions.

Technical Field

The invention relates to the technical field of infrared concealment, in particular to an active heat mixed flow infrared concealment structure.

Background

With the wide application of infrared detection technology and infrared precise guidance technology in the military field and the development of various guided weapons and equipment, various weapons and equipment in sea, land and air have greater viability in a battlefield environment, and various stealth technologies including infrared stealth are required to reduce the probability of being searched, tracked and locked. Especially, military logistics support vehicles including motor vehicles on the ground have low relative moving speed and low defense capability, and are hidden from our being the most basic survival path. The infrared system has higher resolution than a radar system, good concealment and less electronic interference, and has the advantages of being capable of identifying camouflage, working day and night, being less influenced by weather and the like compared with a visible light system. Therefore, the method is widely applied in military affairs. However, the infrared stealth technology of all countries is mainly applied to airplanes and ships at present, and the red stealth technology specially developed and applied to military vehicles on the ground is relatively few, because the heat dissipation means and the heat dissipation effect of land motor vehicles are relatively limited compared with the heat dissipation convenience of high-speed flight of airplanes and water ships, and the high temperature and high heat exhausted by an engine cannot be rapidly cooled to eliminate the infrared characteristic.

Disclosure of Invention

The invention aims to solve the existing problems and provides an active heat mixed flow infrared hiding structure, which is used for reducing the temperature of a large amount of cold air in an environment by mixing flow with high-temperature tail gas through active energy, quickly reducing the temperature of the tail gas of an engine, eliminating the infrared characteristic and realizing the infrared hiding function.

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

the invention provides an active heat mixed flow infrared hidden structure which mainly comprises a mixed flow heat exchange body, an active air inlet turbine, an infrared suppression shell and a reflecting cover, wherein the mixed flow heat exchange body is provided with a heat exchange cavity;

the mixed flow heat exchange body consists of an inner cylinder, a boundary layer mixing ejector, a transition turbulent mixer and a driving air inlet turbine; the boundary layer hybrid ejector is tightly sleeved at one end of the inner cylinder and comprises a tail gas inlet pipe, an air inlet taper pipe, an end plate support A, a flow guide spray pipe, an end plate support B and a mixed flow inlet pipe, wherein the rear end of the tail gas inlet pipe is connected with a small opening of the air inlet taper pipe, the bottom of the air inlet taper pipe is connected with the end plate support A, the hollow through flow guide spray pipe connects the two end plate supports through opposite through holes on the end plate support A and the end plate support B and enables two outer side spaces of the two end plate supports to be communicated, through holes are also formed in the positions of other plate surfaces on the end plate support B except the through holes connected with the flow guide spray pipe, and the mixed flow inlet pipe penetrates through the inner cylinder to be connected between cavities formed by the end plate support A and the end plate support B of the boundary layer hybrid ejector and; the transition turbulent flow mixer is tightly sleeved at the other end of the inner cylinder and consists of an end plate support C, a diffuser, an end plate support D, a spoiler, an exhaust cone pipe and an exhaust pipe, wherein the hollow through diffuser connects the two end plate supports through opposite through holes on the end plate support C and the end plate support D and enables two outer side spaces of the two end plate supports to be communicated so that air flow can circulate without obstruction; a condensed water chamber is arranged at the lowest part of an inner cavity of a mixed flow heat exchange body consisting of the boundary layer mixed flow ejector, the transition turbulent flow mixer and the inner cylinder, and a water level limiting pipe is arranged at the position higher than the bottom of the condensed water chamber;

the driving air inlet turbine is arranged at the inlet end of the mixed flow air inlet pipe;

the infrared inhibition shell consists of a shielding layer shell and a composite shielding layer, the composite shielding layer is tightly attached to the periphery of the mixed flow heat exchange body and fully covers the mixed flow heat exchange body to insulate heat and preserve heat, the periphery of the composite shielding layer is matched with an upper shielding layer shell to serve as a protective shell of the technical structure of the invention, and a mixed flow air inlet pipe, a tail gas inlet pipe and an exhaust pipe of the mixed flow heat exchange body penetrate through the infrared inhibition shell to be directly communicated with the outside;

the reflector is arranged on the upper part of the periphery of the infrared suppression shell and has the function of reflecting residual temperature radiation on the surface of the infrared suppression shell to the ground without radiating on equipment or parts close to the technical structure.

Furthermore, the flow guide spray pipe of the boundary layer mixing ejector is a hollow through pipe with a conical hole at one end, the conical hole is positioned at one side connected with the through hole of the end plate support B, the area range of the connection between the flow guide spray pipe and the end plate support A is not more than the bottom range of the air inlet conical pipe, and through holes are also formed in the positions of other plate surfaces on the end plate support B except the through hole connected with the flow guide spray pipe.

Furthermore, the contraction pipes and the diffusion pipes at the two ends of the diffuser are conical reducing pipes, the diameters of the pipes are gradually increased, and the large openings of the pipes face outwards.

Further, the boundary layer mixing ejector and the transition turbulent mixer are tightly sleeved in the inner cylinder together, the tapered orifice end of the flow guide spray pipe of the boundary layer mixing ejector is opposite to the contraction pipe end of the diffuser of the transition turbulent mixer, the center of the tapered orifice of the flow guide spray pipe and the center of the contraction pipe of the diffuser are on the same axis, the two are the same in number and are paired, and the pairing number is at least one group.

Furthermore, the cylinder body of the inner cylinder is fully distributed with through holes, and the condensed water in the condensed water chamber at the lowest part of the inner cavity of the mixed flow heat exchange body infiltrates into the composite shielding layer through the through holes.

Furthermore, the quantity of the mixed flow air inlet pipe is at least one, the driving air inlet turbine arranged in the mixed flow air inlet pipe is matched with the mixed flow air inlet pipe, and the quantity of the mixed flow air inlet pipe is at least one.

Further, the outlet direction of the exhaust pipe is perpendicular to the ground.

Furthermore, the water level limiting pipe penetrates through the infrared suppression shell to be communicated with the external environment, and the pipe orifice does not exceed the surface of the shielding shell.

Furthermore, the composite shielding layer is made of a flexible heat-insulating material which is resistant to high and low temperatures and has water absorption and sound absorption functions.

The infrared heat engine has the beneficial effects that when the engine works to exhaust tail gas, negative pressure is formed by virtue of the injection structure to suck a large amount of cold air to enter the mixing cooling, the temperature is further reduced and silenced in transition turbulence, meanwhile, latent heat of vaporization of condensed water is fully utilized to help the cooling, and the infrared heat engine realizes an infrared heat shielding function through multi-gradient cooling, and is suitable for meeting the infrared shielding requirements of land motor vehicles and heat engine equipment.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1: is a structural schematic diagram of the invention;

FIG. 2: is a schematic flow diagram of the gas stream of the present invention;

the numbers in the figure represent the following components:

01. tail gas inlet pipe: connecting an exhaust port of the engine and introducing engine exhaust;

02. an air inlet taper pipe: guiding the high-temperature tail gas to uniformly distribute into the flow guide pipe;

03. an end plate bracket A: fixing the flow guide pipe;

04. flow guide spray pipe: shunting and accelerating tail gas;

05. an end plate bracket B: the fixed flow guide pipe and the end plate bracket A form a cold air guide cavity;

06. an end plate bracket C: fixing the diffuser positioning convergent nozzle;

07. shrinkage pipe: the air and tail gas mixing interval;

08. a diffuser: components forming the transition turbulent mixer;

09. a diffusion tube: transition turbulence interval of mixed gas

10. End plate support D: fixing the diffuser positioning diffusion pipe orifice;

11. a spoiler: the turbulence intensity of the mixed gas is enhanced, and the heat exchange time is prolonged;

12. an exhaust taper pipe: guiding the discharge of the mixed gas;

13. an exhaust pipe: guiding the exhaust direction;

14. a mixed flow air inlet pipe: introducing cool air into the environment;

15. the active air inlet turbine: actively introducing cold air in the environment to supplement and solve the working interval with insufficient suction;

16. condensation water chamber: collecting and storing condensed water;

17. an inner cylinder: a fixed boundary layer mixing ejector and a transition turbulent mixer;

18. a shielding layer shell: protective shield

19. A composite shielding layer: carrying out heat insulation on the mixed flow heat exchange body;

20. a reflector: reflecting the residual heat radiation on the surface of the infrared suppression shell to the ground without diffusing to the equipment or parts close to the technical structure of the invention;

21. a water level limiting pipe: excess condensate is conducted out of the environment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present technology clearer, the following will describe technical solutions of the present technology in detail. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present technology, are within the scope of the present technology.

As shown in fig. 1 and 2, an active thermal mixing infrared concealing structure: the device mainly comprises a mixed flow heat exchange body, an active air inlet turbine, an infrared suppression shell and a reflector 20;

the mixed flow heat exchange body consists of an inner cylinder 17, a boundary layer mixing ejector and a transition turbulent mixer; wherein the boundary layer mixing ejector is tightly sleeved at one end of the inner cylinder 17 and consists of a tail gas inlet pipe 01, an air inlet taper pipe 02, an end plate bracket A03, a diversion spray pipe 04, an end plate bracket B05 and a mixed flow inlet pipe 14; the rear end of a tail gas inlet pipe 01 is connected with a small opening of an air inlet taper pipe 02, the bottom of the air inlet taper pipe 02 is connected with an end plate support A03, a hollow through-hole flow guide spray pipe 04 with a taper hole connects the two end plate supports through opposite through holes on an end plate support A03 and an end plate support B05, two outer side spaces of the two end plate supports are communicated, air flow can flow without blockage, through holes are also arranged on the other plate surfaces except the through hole connected with the flow guide spray pipe 04 on the end plate support B05, and a mixed flow inlet pipe 14 penetrates through an inner cylinder 17 to be connected between a cavity formed by the end plate support A03 and the end plate support B05 of the boundary layer hybrid ejector and is communicated with the space; the transition turbulent mixer is tightly sleeved at the other end of the inner cylinder 17 and consists of an end plate bracket C06, a diffuser 08, an end plate bracket D10, the diffuser 08 is connected with two end plate supports through opposite through holes in an end plate support A03 and an end plate support B05, the two side spaces of the two end plate supports are communicated, air flow can circulate freely, the end of a contraction pipe 07 of the diffuser 08 is connected with a through hole in an end plate support C06, the end of a diffusion pipe 09 of the diffuser 08 is connected with a through hole in an end plate support D10, through holes are formed in the end plate support D10 except the through hole connected with the diffusion pipe 09, the outer side of the through hole connected with the diffusion pipe 09 in the end plate support D10 is provided with the spoiler 11, the tail end of an inner cylinder 17 is connected with the bottom of the exhaust cone 12, the exhaust pipe 13 is connected with a small opening in the exhaust side of the exhaust cone 12 and communicated with the outside, and the exhaust direction of the exhaust pipe 13 is perpendicular to the ground; the boundary layer mixing ejector and the transition turbulent mixer are tightly sleeved in the inner cylinder 17 together, the conical orifice end of the flow guide spray pipe 04 of the boundary layer mixing ejector is opposite to the end 07 of the contraction pipe 07 of the diffuser 08 of the transition turbulent mixer, the center of the conical orifice of the flow guide spray pipe 04 and the center of the contraction pipe 07 of the diffuser 08 are on the same axis, the two are the same in number and are paired, and the pairing number is at least one group; a condensed water chamber 16 is arranged at the lowest part of an inner cavity of a mixed flow heat exchange body formed by the boundary layer mixed flow ejector, the transition turbulent flow mixer and the inner cylinder 17, a water level limiting pipe 21 is arranged at the bottom of the condensed water chamber 16 and communicated with the outside, and the pipe orifice of the water level limiting pipe 21 does not protrude out of the surface of the shielding layer shell 18; the driving air inlet turbine 15 is arranged at the inlet end of the mixed flow air inlet pipe 14; the infrared inhibition shell consists of a shielding layer shell 18 and a composite shielding layer 19, the composite shielding layer 19 is tightly attached to the periphery of the mixed flow heat exchange body and completely covers the mixed flow heat exchange body to insulate heat and preserve heat, the periphery of the composite shielding layer 19 is matched with the upper shielding layer shell 18 to be used as a protective shell of the technical structure of the invention, and a mixed flow air inlet pipe 14, a tail gas inlet pipe 01 and an exhaust pipe 13 of the mixed flow heat exchange body penetrate out of the infrared inhibition shell and are directly communicated with the outside; a reflector 20 is mounted on the upper peripheral portion of the shield casing 18 for the purpose of reflecting the residual heat radiation from the surface of the infrared suppressing body to the ground without being diffused to the equipment or parts adjacent to the structure of the present invention.

When the active heat-mixed flow infrared hidden structure works, engine exhaust flowing at high temperature enters the air inlet taper pipe 02 through the exhaust inlet pipe 01 and then passes through the flow guide spraying pipe 04, the exhaust is accelerated through the taper pipe opening of the flow guide spraying pipe 04 and then sprayed into the contraction pipe 07 of the transition turbulent mixer, meanwhile, negative pressure is formed at the rear side of the taper pipe opening to generate suction force, cold air in the environment is sucked into a cavity formed by the end plate support A03 and the end plate support B05 through the mixed flow inlet pipe 14 communicated with the outside, the cold air entering the cavity absorbs part of the heat of the exhaust flowing through the flow guide spraying pipe 04 and then enters a mixing cavity formed by the end plate support B05 and the end plate support C06 from through holes of the end plate support B05, and then enters the contraction pipe 07 along with the accelerated exhaust after the first temperature reduction to be mixed, the mixed exhaust after the temperature reduction enters the diffusion pipe 09 of the transition turbulent mixer to be diffused and converted into a turbulent state, therefore, the volume of the mixed tail gas in the diffusion pipe 09 is increased, the flow speed is increased, the temperature is reduced, the mixed tail gas is further reduced to become the exhaust tail gas, the exhaust tail gas enters the exhaust taper pipe 12 from the diffusion pipe 09, and the spoiler 11 arranged on the outer side of the opening of the diffusion pipe 09 of the end plate support D10 enables the exhaust tail gas to be in a turbulent flow state further, the exhaust tail gas is cooled for the third time, and finally most of the exhaust tail gas with the high-temperature infrared characteristic eliminated is discharged to the external environment from the exhaust pipe 13 to realize the infrared concealing function; a small part of the spent tail gas flows back into a cavity formed by the end plate bracket D10 and the end plate bracket C06 through holes on the end plate bracket D10 and convects the mixed tail gas flowing through the diffuser 08 to absorb heat to reduce the temperature; the tail gas can generate condensed water in the three-time stepped temperature reduction process, the condensed water is collected in a condensed water chamber 16 at the bottom of the mixed flow heat exchange body, the condensed water firstly infiltrates into the composite shielding layer 19 through holes fully distributed on the cylinder body of the inner cylinder 17 to absorb heat and evaporate to help the composite shielding layer 19 to reduce the temperature, the rest condensed water stored in the condensed water chamber 16 continuously absorbs a large amount of tail gas heat in a steam generation latent heat mode in the mixed flow heat exchange body to form steam and then is discharged from the exhaust pipe 13 along with the exhausted tail gas, when the excessive water level of the condensed water is too high, the condensed water is discharged through a water level limiting pipe 21 on the condensed water chamber 16, and because the pipe orifice of the water level limiting pipe 21 is not protruded out of the shielding layer shell 18, the condensed water overflows to the surface of the shielding layer shell 18 and evaporates by absorbing the residual heat on the surface of the shielding layer shell 18; when the exhaust gas flow speed entering the active hot mixed flow infrared concealing structure is too low to generate suction force which is not enough to suck sufficient external cold air, the active air inlet turbine 15 is started to input a large amount of external cold air to enter the mixing transition turbulent flow cooling circulation work to realize the infrared concealing purpose.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and therefore, the scope of the present invention should be determined by the scope of the claims.