A gas atomization injection cavity integrated module for catalytic decomposition of hydrogen peroxide and a method for enhancing injection flame stabilization

Abstract

The present invention relates to the field of scramjet technology and addresses the technical issues of scramjet engines, such as the difficulty of wide-area organized combustion and flame stabilization. In particular, it relates to an integrated module for atomized injection cavity for catalytic decomposition of hydrogen peroxide and a method for enhancing injection flame stabilization. The module utilizes a catalytic decomposition module to decompose liquid hydrogen peroxide into high-temperature oxygen and water vapor. The decomposed gas is then mixed with kerosene in a pipeline to form kerosene atomized with the high-temperature oxygen and water vapor. The kerosene is then atomized and injected laterally upstream of the cavity through atomized kerosene nozzles, forming a transverse jet of atomized kerosene within a supersonic combustion chamber, thereby improving combustion efficiency. By forming an oxygen-enriched jet within the supersonic combustion chamber that enhances combustion performance, the present invention can help improve the ignition performance of liquid kerosene, while also reducing the atomized particle size and increasing the jet penetration depth, thereby improving gas mixing efficiency and broadening the range of flame stabilization for supersonic combustion of liquid kerosene.

Description

Technical Field

[0001] The present invention relates to the technical field of scramjet engines, and in particular to an aerosolized injection cavity integrated module for catalytic decomposition of hydrogen peroxide and a method for enhancing injection flame stabilization. Background Art

[0002] Liquid hydrocarbon fuel undergoes a series of processes within a supersonic combustion chamber, including fuel injection atomization, fuel-air mixing, ignition, and stable combustion. This entire process typically occurs within a fuel residence time of a few milliseconds. Therefore, after injection, the fuel must be quickly and thoroughly mixed with the incoming air, and appropriate flame stabilization measures must be implemented to ensure that the fuel fully burns within this brief residence time, releasing heat that is ultimately converted into thrust.

[0003] However, for scramjets operating at Ma<4.0, the low total temperature of the incoming air (<900K) often prevents the fuel from self-igniting. Furthermore, physical processes such as liquid hydrocarbon fuel droplet breakup, atomization, evaporation, and gas mixing hinder ignition delays, making ignition and flame stabilization within the combustion chamber difficult. Furthermore, for flight conditions exceeding Ma>7, the ultra-high velocity of the flow reduces fuel-air mixing efficiency, shortens fuel residence time, and increases the difficulty of organizing combustion. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides an integrated module of an aerosolized injection cavity for catalytic decomposition of hydrogen peroxide and a method for enhancing injection flame stabilization, which solves the technical problems of the difficulty of wide-area combustion organization and flame stabilization in scramjet engines.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: an integrated module for aerosol injection cavity for catalytic decomposition of hydrogen peroxide, comprising a supply module for supplying liquid hydrogen peroxide to a catalytic decomposition module by extrusion or pump pressure, wherein the catalytic decomposition module fully and completely catalytically decomposes the liquid hydrogen peroxide into a high-temperature decomposition gas of hydrogen peroxide containing high-temperature oxygen and water vapor;

[0006] The aerosol injection cavity integrated module also includes an injection cavity integrated module arranged on the supersonic combustion chamber, and an aerosol kerosene nozzle hole with an outlet located on the surface of the injection cavity integrated module. A cavity is arranged downstream of the aerosol kerosene nozzle hole. The high-temperature decomposition gas of hydrogen peroxide and kerosene are mixed in the injection cavity integrated module to form aerated atomized kerosene aerated with high-temperature oxygen and water vapor. The kerosene is laterally injected upstream of the cavity through the aerosol kerosene nozzle hole and forms an oxygen-rich jet that enhances combustion performance in the supersonic combustion chamber. The oxygen-rich jet burns in the cavity to form a high-temperature, oxygen-rich, low-speed recirculation zone.

[0007] Furthermore, the cavity includes a cavity front end face perpendicular to the surface of the injection cavity integrated module, and a cavity bottom face parallel to the surface of the injection cavity integrated module and perpendicular to the cavity front end face, and the inclined surface connecting the cavity bottom face and the surface of the injection cavity integrated module constitutes the cavity rear end face.

[0008] Furthermore, the outlet of the catalytic decomposition module is connected to a sonic flowmeter, and the high-temperature decomposition gas of hydrogen peroxide generates a critical cross section at the throat of the sonic flowmeter, thereby achieving throttling of the high-temperature decomposition gas of hydrogen peroxide.

[0009] Furthermore, the injection cavity integrated module includes a kerosene inlet pipeline provided thereon, and a decomposition gas pipeline connected to the outlet of the sonic flowmeter, the hydrogen peroxide decomposition gas pipeline is coaxial with and penetrates the atomized kerosene nozzle, and the decomposition gas pipeline is provided with multiple liquid inlet holes, and the decomposition gas pipeline is connected to the kerosene pipeline through the liquid inlet holes;

[0010] The kerosene inlet pipeline is connected to the kerosene pipeline after passing through the annular kerosene confluence chamber. Multiple kerosene pipelines are parallel to the decomposition gas pipeline and are evenly distributed around its circumference. The injection cavity integrated module is provided with an igniter vertically mounted on the bottom surface of the cavity, and the working surface of the igniter is coplanar with the bottom surface of the cavity.

[0011] Furthermore, the liquid inlet hole is any one of a straight hole, an inclined hole or a tangential hole, the number of the liquid inlet holes is at least 4, and the cross-sectional shape of the liquid inlet hole is at least one of a circle, an ellipse, a rectangle, a diamond or a raindrop shape.

[0012] Furthermore, the number of the atomized kerosene nozzles can be one or more, the cross-sectional shape of the atomized kerosene nozzles is one of circular, elliptical, rectangular, diamond or raindrop-shaped, and the axis of the atomized kerosene nozzles is at right angles to the surface of the injection cavity integrated module.

[0013] Furthermore, the length-to-depth ratio of the cavity is 5-8, the angle between the rear end face of the cavity and the bottom face of the cavity is 40°-50°, and the distance from the front end face of the cavity to the aerosolized kerosene nozzle is 15-30 times the equivalent diameter of the nozzle.

[0014] Furthermore, the catalytic decomposition module has an outer shell, including a hydrogen peroxide inlet, a compression element, a distribution orifice plate, a catalytic bed, an outlet porous structure, and a hydrogen peroxide decomposition gas outlet distributed in the outer shell from upstream to downstream;

[0015] The hydrogen peroxide inlet is connected to the outlet of the supply module through a pipeline. The distribution orifice plate, the catalytic bed, and the outlet porous structure are pressed and fixed in the outer shell from top to bottom by a compression element. The compression element is a gasket or a spring. The distribution orifice plate is evenly distributed with multiple small holes that allow hydrogen peroxide to evenly enter the catalytic bed.

[0016] Furthermore, the catalytic bed is a porous structure of 40-70 overlapping 40-mesh silver meshes or a silver-plated nickel-based high-temperature alloy 3D printed structure, and the porous structure is a lattice structure with a porosity of 30% to 80%;

[0017] The outlet porous structure is a porous structure 3D-printed by a nickel-based high-temperature alloy, and the porous structure is a lattice structure or a straight pore structure.

[0018] The technical solution also provides a method for enhancing the flame stabilization of injection using the above-mentioned gas atomization injection cavity integrated module, the method comprising the following steps:

[0019] S1. The supply module delivers liquid hydrogen peroxide to the hydrogen peroxide inlet of the catalytic decomposition module through the first pipeline. The hydrogen peroxide then flows through the distribution orifice plate and evenly passes through the catalytic bed. The outlet porous structure provides a certain back pressure for the hydrogen peroxide flowing through the catalytic bed, so that the hydrogen peroxide fully contacts the silver mesh or silver-plated porous structure in the catalytic bed, ensuring that the hydrogen peroxide is fully and completely catalytically decomposed into hydrogen peroxide high-temperature decomposition gas, namely high-temperature oxygen and water vapor.

[0020] S2. High-temperature oxygen and water vapor flow out from the hydrogen peroxide decomposition gas outlet of the catalytic decomposition module, and generate a critical cross section at the throat of the sonic flowmeter to achieve throttling of the high-temperature decomposition gas of hydrogen peroxide;

[0021] S3. The high-temperature decomposition gas of hydrogen peroxide flowing out of the sonic flowmeter enters the decomposition gas pipeline through the second pipeline. At the same time, kerosene flows through the kerosene inlet pipeline, the kerosene confluence chamber, and the kerosene pipeline, and then enters the decomposition gas pipeline through the liquid inlet hole. There, it mixes with the high-temperature oxygen and water vapor to form aerated atomized kerosene aerated by the high-temperature oxygen and water vapor.

[0022] S4, the kerosene atomized by high-temperature oxygen and water vapor is sprayed laterally upstream of the cavity through the atomized kerosene nozzle hole, and forms an atomized kerosene transverse jet in the supersonic combustion chamber;

[0023] S5. The difference in air flow velocity between the mainstream and the cavity in the supersonic combustion chamber forms a cavity shear layer at the front end of the cavity. A portion of the oxygen-rich atomized kerosene transverse jet oscillates through the cavity shear layer and enters the cavity, where it burns to form a high-temperature, oxygen-rich, low-speed recirculation zone, thereby widening the flame stability range.

[0024] By means of the above technical solution, the present invention provides an integrated module for atomized injection cavity for catalytic decomposition of hydrogen peroxide and a method for enhancing injection flame stabilization, which has at least the following beneficial effects:

[0025] 1. The aerosol injection cavity integrated module proposed in the present invention can help improve the ignition performance of liquid kerosene by forming an oxygen-rich jet within the supersonic combustion chamber to enhance combustion performance. It can also reduce the atomized particle size and increase the jet penetration depth, thereby improving the gas mixing efficiency. In addition, a portion of the aerosolized kerosene enters the cavity through shear layer oscillation, forming a high-temperature, oxygen-rich, low-speed confluence zone within the cavity, which helps to broaden the flame stability range of the liquid kerosene supersonic combustion.

[0026] 2. This invention utilizes the fact that the pressure within the atomized kerosene nozzle is higher than the ambient pressure within the supersonic combustion chamber. This causes the bubbles within the atomized kerosene transverse jet to expand and rupture, breaking up the kerosene enveloped by the bubbles into smaller droplets. Furthermore, transverse injection increases jet penetration depth, shortens the gas mixing distance, and improves gas mixing efficiency. Furthermore, the pyrolysis gas of hydrogen peroxide contains high-temperature oxygen. The oxygen-rich jet formed by transverse injection shortens ignition time and enhances combustion performance.

[0027] 3. The present invention utilizes the difference in air flow velocity between the mainstream of the supersonic combustion chamber and the cavity to form a cavity shear layer at the front end surface of the cavity, which causes the atomized kerosene transverse jet to oscillate into the cavity, thereby widening the flame stabilization range. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 Schematic diagram of the structure of the aerosol injection cavity integrated module of the present invention;

[0030] Figure 2 Schematic diagram of the flow field of the atomized kerosene transverse jet in the present invention.

[0031] In the figure: 1. Supply module; 2. Catalytic decomposition module; 3. Sonic flowmeter; 4. Injection cavity integrated module; 5. First pipeline; 6. Second pipeline; 7. Decomposition gas pipeline; 8. Hydrogen peroxide inlet; 9. Compression element; 10. Distribution orifice plate; 11. Catalytic bed; 12. Outlet porous structure; 13. Hydrogen peroxide decomposition gas outlet; 14. Kerosene inlet pipeline; 15. Kerosene confluence chamber; 16. Kerosene pipeline; 17. Liquid inlet hole; 18. Atomized kerosene nozzle hole; 19. Cavity; 20. Ignitor; 21. Cavity front face; 22. Cavity bottom face; 23. Cavity rear face; 24. Aerated atomized kerosene; 25. Atomized kerosene transverse jet; 26. Supersonic combustion chamber mainstream; 27. Cavity shear layer; 28. Low-speed recirculation zone. DETAILED DESCRIPTION

[0032] To make the above-mentioned objectives, features, and advantages of the present invention more clearly understood, the present invention is further described below in detail with reference to the accompanying drawings and specific embodiments. This will enable a full understanding of how this application uses technical means to solve technical problems and achieve technical effects, and to implement the invention accordingly.

[0033] Example 1

[0034] To solve the problem of wide-area combustion organization and flame stabilization in scramjet engines, please refer to Figure 1 and Figure 2 This embodiment proposes an integrated module for hydrogen peroxide catalytic decomposition using an atomized injection cavity. By forming an oxygen-rich jet within a supersonic combustion chamber to enhance combustion performance, this module improves the ignition performance of liquid kerosene. It also reduces the atomized particle size and increases jet penetration depth, thereby enhancing gas mixing efficiency. Furthermore, a portion of the atomized kerosene enters the cavity through shear layer oscillation, forming a high-temperature, oxygen-rich, low-velocity confluence zone within the cavity, which helps broaden the flame stability range of the liquid kerosene supersonic combustion. The supply module 1 supplies liquid hydrogen peroxide to the catalytic decomposition module 2 via extrusion or pump pressure. A sonic flowmeter 3 is connected to the outlet of the catalytic decomposition module 2. The catalytic decomposition module 2 fully and catalytically decomposes the liquid hydrogen peroxide into a pyrolysis hydrogen peroxide gas containing high-temperature oxygen and water vapor. The pyrolysis hydrogen peroxide gas generates a critical cross section at the throat of the sonic flowmeter 3, thereby throttling the pyrolysis hydrogen peroxide gas.

[0035] The atomizing injection cavity integrated module also includes an injection cavity integrated module 4 positioned on the supersonic combustion chamber, and an atomizing kerosene nozzle 18 with an outlet positioned on the surface of the injection cavity integrated module 4. The injection cavity integrated module 4 is fabricated by machining, welding, or additive manufacturing. A cavity 19 is disposed downstream of the atomizing kerosene nozzle 18. There may be one or more atomizing kerosene nozzles 18, each with a cross-sectional shape selected from the group consisting of circular, elliptical, rectangular, diamond, and raindrop shapes. The axis of the atomizing kerosene nozzle 18 forms a right angle with the surface of the injection cavity integrated module 4. The high-temperature decomposition gas of hydrogen peroxide is mixed with kerosene in the injection cavity integrated module 4 to form aerated atomized kerosene 24 aerated with high-temperature oxygen and water vapor, which is laterally injected upstream of the cavity 19 through the atomized kerosene nozzle 18 and forms an oxygen-rich jet that enhances the combustion performance in the supersonic combustion chamber. The oxygen-rich jet burns in the cavity 19 to form a high-temperature, oxygen-rich, low-speed recirculation zone 28.

[0036] The cavity 19 includes a cavity front end face 21 perpendicular to the surface of the injection cavity integrated module 4, and a cavity bottom face 22 parallel to the surface of the injection cavity integrated module 4 and perpendicular to the cavity front end face 21. The inclined surface connecting the cavity bottom face 22 and the surface of the injection cavity integrated module 4 constitutes a cavity rear end face 23. The length-to-depth ratio of the cavity 19 is 5 to 8, the angle between the cavity rear end face 23 and the cavity bottom face 22 is 40° to 50°, and the distance from the cavity front end face 21 to the atomizing kerosene nozzle 18 is 15 to 30 times the equivalent diameter of the nozzle.

[0037] The injection cavity integrated module 4 includes a kerosene inlet pipeline 14 arranged thereon, and a decomposition gas pipeline 7 connected to the outlet of the sonic flowmeter 3 through a second pipeline 6. The hydrogen peroxide decomposition gas pipeline 7 is coaxial with and penetrates the atomized kerosene nozzle 18. The decomposition gas pipeline 7 is provided with a plurality of liquid inlet holes 17, which are any one of straight holes, inclined holes or tangential holes. The number of liquid inlet holes 17 is at least 4, and the cross-sectional shape of the liquid inlet holes 17 is at least one of circular, elliptical, rectangular, diamond or raindrop-shaped. The decomposition gas pipeline 7 is connected to the kerosene pipeline 16 through the liquid inlet hole 17. The kerosene inlet pipeline 14 is connected to the kerosene pipeline 16 after passing through the annular kerosene confluence chamber 15. The kerosene pipeline 16 is a plurality of pipelines parallel to the decomposition gas pipeline 7 and evenly distributed around the decomposition gas pipeline 7. The injection cavity integrated module 4 is provided with an igniter 20 vertically mounted on the bottom surface 22 of the cavity, and the working surface of the igniter 20 is coplanar with the bottom surface 22 of the cavity.

[0038] The catalytic decomposition module 2 has an outer shell, including a hydrogen peroxide inlet 8, a compression element 9, a distribution orifice 10, a catalytic bed 11, an outlet porous structure 12, and a hydrogen peroxide decomposition gas outlet 13 distributed in sequence from upstream to downstream in the outer shell. The hydrogen peroxide inlet 8 is connected to the outlet of the supply module 1 through a first pipeline 5. The distribution orifice 10, the catalytic bed 11, and the outlet porous structure 12 are compressed and fixed in the outer shell from top to bottom by the compression element 9. The compression element 9 is a gasket or a spring. The distribution orifice 10 is evenly distributed with multiple small holes that allow hydrogen peroxide to evenly enter the catalytic bed 11.

[0039] The catalytic bed 11 is a porous structure composed of 40-70 overlapping 40-mesh silver mesh sheets or a silver-plated nickel-based superalloy 3D-printed porous structure. The porous structure is a lattice structure with a porosity of 30% to 80%, ensuring sufficient surface area for the full decomposition of hydrogen peroxide while maintaining an acceptable pressure drop. The silver plating thickness of the porous structure is greater than 10 μm.

[0040] The outlet porous structure 12 is a nickel-based high-temperature alloy 3D-printed porous structure with a lattice structure or a straight pore structure. When hydrogen peroxide flows through the outlet porous structure, it provides a certain back pressure for the catalyst bed 11, thereby increasing the residence time of hydrogen peroxide in the catalyst bed 11.

[0041] In this embodiment, the high-temperature decomposition gas of hydrogen peroxide generated by the catalytic decomposition of hydrogen peroxide is used to mix high-temperature oxygen and water vapor with kerosene, and then atomizes the liquid kerosene through an atomizing kerosene nozzle and sprays it laterally, thereby reducing the atomized particle size and increasing the jet penetration depth, thereby improving the gas mixing efficiency.

[0042] The pyrolysis gas from hydrogen peroxide atomizes the liquid kerosene, forming an oxygen-rich jet that helps improve the ignition performance of the liquid kerosene. Simultaneously, a portion of the atomized kerosene enters the cavity through shear layer oscillation, forming a high-temperature, oxygen-rich, low-speed confluence zone within the cavity, which helps broaden the flame stability range of the liquid kerosene supersonic combustion.

[0043] Example 2

[0044] Based on Example 1, please refer to Figure 1 and Figure 2 This embodiment proposes a method for enhancing flame stabilization by injection using an integrated atomized injection cavity module. This method utilizes a catalytic decomposition module 2 to decompose liquid hydrogen peroxide into high-temperature oxygen and water vapor. The decomposed gas is then mixed with kerosene in a decomposition gas pipeline 7 to form kerosene 24 atomized with high-temperature oxygen and water vapor. This kerosene 24 is then sprayed laterally upstream of a cavity 19 through an atomized kerosene nozzle 18, forming an atomized kerosene transverse jet 25 within a supersonic combustion chamber, thereby improving combustion efficiency. Finally, a portion of the oxygen-enriched atomized kerosene transverse jet 25 oscillates through a cavity shear layer 27 and enters the cavity 19, where it burns to form a high-temperature, oxygen-rich, low-speed recirculation zone 28, thereby broadening the flame stabilization range. The specific implementation method is as follows:

[0045] S1. The supply module 1 delivers liquid hydrogen peroxide to the hydrogen peroxide inlet 8 of the catalytic decomposition module 2 through the first pipeline 5. The hydrogen peroxide then flows through the distribution orifice plate 10 and evenly passes through the catalytic bed 11. The outlet porous structure 12 provides a certain back pressure for the hydrogen peroxide flowing through the catalytic bed 11, so that the hydrogen peroxide is fully in contact with the silver mesh or silver-plated porous structure in the catalytic bed 11, ensuring that the hydrogen peroxide is fully and completely catalytically decomposed into high-temperature decomposition gas of hydrogen peroxide, namely high-temperature oxygen and water vapor.

[0046] S2, high-temperature oxygen and water vapor flow out from the hydrogen peroxide decomposition gas outlet 13 of the catalytic decomposition module 2, and generate a critical cross section at the throat of the sonic flowmeter 3 to achieve throttling of the high-temperature decomposition gas of hydrogen peroxide, wherein the total temperature T0, total pressure P0 at the hydrogen peroxide decomposition gas outlet 13 and the throat area A of the sonic flowmeter 3 are * Determine the flow rate of hydrogen peroxide pyrolysis gas Right now:

[0047]

[0048] Wherein, R is the gas constant of hydrogen peroxide decomposition at high temperature; γ is the specific heat ratio of hydrogen peroxide decomposition at high temperature.

[0049] S3. The high-temperature decomposition gas of hydrogen peroxide flowing out of the sonic flowmeter 3 enters the decomposition gas pipeline 7 through the second pipeline 6. At the same time, kerosene flows through the kerosene inlet pipeline 14, the kerosene confluence chamber 15, and the kerosene pipeline 16, and then enters the decomposition gas pipeline 7 through the liquid inlet hole 17. It is mixed with the high-temperature oxygen and water vapor in the decomposition gas pipeline 7 to form aerated atomized kerosene 24 aerated and atomized by the high-temperature oxygen and water vapor.

[0050] S4: Kerosene 24, atomized by high-temperature oxygen and water vapor, is laterally injected upstream of cavity 19 through atomizing kerosene nozzle 18, forming atomized kerosene transverse jet 25 in the supersonic combustion chamber. Because the pressure within atomizing kerosene nozzle 18 is higher than the ambient pressure within the supersonic combustion chamber, the bubbles within atomizing kerosene transverse jet 25 further expand and rupture, causing the kerosene encased in the bubbles to break up and form smaller droplets. The transverse injection of atomized kerosene transverse jet 25 increases jet penetration depth, shortens the gas mixing distance, and improves gas mixing efficiency. Furthermore, the high-temperature decomposition gas of hydrogen peroxide contains high-temperature oxygen. The oxygen-rich jet formed by transverse injection shortens ignition time and enhances combustion performance.

[0051] S5. The difference in air flow velocity between the mainstream 26 of the supersonic combustion chamber and the concave cavity 19 forms a concave cavity shear layer 27 at the front end surface 21 of the concave cavity. A portion of the oxygen-rich atomized kerosene transverse jet 25 oscillates through the concave cavity shear layer 27 and enters the concave cavity 19, where it burns to form a high-temperature, oxygen-rich, low-speed recirculation zone 28, thereby widening the flame stabilization range.

[0052] This embodiment can help improve the ignition performance of liquid kerosene by forming an oxygen-rich jet that enhances combustion performance in the supersonic combustion chamber. At the same time, it can reduce the atomized particle size and increase the jet penetration depth, thereby improving the gas mixing efficiency. In addition, a portion of the atomized kerosene enters the concave cavity through shear layer oscillation, forming a high-temperature, oxygen-rich, low-speed confluence zone in the concave cavity, which helps to broaden the flame stabilization range of the liquid kerosene supersonic combustion.

[0053] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to in detail. For the above embodiments, since they are basically similar to the method embodiments, the description is relatively simple. For relevant parts, please refer to the partial description of the method embodiments.

[0054] The above embodiments provide a detailed introduction to the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. An integrated module for aerosol injection cavity for catalytic decomposition of hydrogen peroxide, comprising a supply module (1) for supplying liquid hydrogen peroxide to a catalytic decomposition module (2) by extrusion supply or pump pressure supply, characterized in that: The catalytic decomposition module (2) catalytically decomposes liquid hydrogen peroxide into a high-temperature decomposition gas of hydrogen peroxide containing high-temperature oxygen and water vapor; The aerosol injection cavity integrated module further comprises an injection cavity integrated module (4) arranged on the supersonic combustion chamber, and an aerosol kerosene nozzle hole (18) with an outlet located on the surface of the injection cavity integrated module (4); a cavity (19) is arranged downstream of the aerosol kerosene nozzle hole (18); hydrogen peroxide high-temperature decomposition gas and kerosene are mixed in the injection cavity integrated module (4) to form aerated atomized kerosene (24) aerated with high-temperature oxygen and water vapor; the aerosol kerosene (24) is laterally injected upstream of the cavity (19) through the aerosol kerosene nozzle hole (18), and an oxygen-rich jet that enhances combustion performance is formed in the supersonic combustion chamber; and the oxygen-rich jet burns in the cavity (19) to form a high-temperature, oxygen-rich, low-speed recirculation zone (28).

2. The aerosol injection cavity integrated module according to claim 1, characterized in that: The cavity (19) comprises a cavity front end face (21) perpendicular to the surface of the injection cavity integrated module (4), and a cavity bottom face (22) parallel to the surface of the injection cavity integrated module (4) and perpendicular to the cavity front end face (21); the inclined surface connecting the cavity bottom face (22) and the surface of the injection cavity integrated module (4) constitutes a cavity rear end face (23).

3. The aerosol injection cavity integrated module according to claim 1, characterized in that: The outlet of the catalytic decomposition module (2) is connected to a sonic flowmeter (3), and the high-temperature decomposition gas of hydrogen peroxide generates a critical cross section at the throat of the sonic flowmeter (3), thereby achieving throttling of the high-temperature decomposition gas of hydrogen peroxide.

4. The aerosol injection cavity integrated module according to claim 3, characterized in that: The injection cavity integrated module (4) includes a kerosene inlet pipeline (14) provided thereon, and a decomposition gas pipeline (7) connected to the outlet of the sonic flowmeter (3); the hydrogen peroxide decomposition gas pipeline (7) is coaxial with and penetrates the atomized kerosene nozzle (18); a plurality of liquid inlet holes (17) are provided on the decomposition gas pipeline (7), and the decomposition gas pipeline (7) is connected to the kerosene pipeline (16) through the liquid inlet holes (17); The kerosene inlet pipeline (14) is connected to the kerosene pipeline (16) after passing through the annular kerosene confluence chamber (15). The plurality of kerosene pipelines (16) are parallel to the decomposition gas pipeline (7) and are evenly distributed around the circumference thereof. The injection cavity integrated module (4) is provided with an igniter (20) vertically mounted on the cavity bottom surface (22), and the working surface of the igniter (20) is coplanar with the cavity bottom surface (22).

5. The aerosol injection cavity integrated module according to claim 4, characterized in that: The liquid inlet holes (17) are any one of straight holes, oblique holes or tangential holes, the number of the liquid inlet holes (17) is at least 4, and the cross-sectional shape of the liquid inlet holes (17) is at least one of circular, elliptical, rectangular, diamond or raindrop-shaped.

6. The aerosol injection cavity integrated module according to claim 1, characterized in that: The number of the atomized kerosene spray holes (18) can be one or more, the cross-sectional shape of the atomized kerosene spray holes (18) is one of circular, elliptical, rectangular, diamond or raindrop-shaped, and the axis of the atomized kerosene spray holes (18) is at right angles to the surface of the injection cavity integrated module (4).

7. The aerosol injection cavity integrated module according to claim 2, characterized in that: The length-to-depth ratio of the cavity (19) is 5-8, the angle between the rear end surface (23) of the cavity and the bottom surface (22) of the cavity is 40°-50°, and the distance from the front end surface (21) of the cavity to the atomized kerosene nozzle (18) is 15-30 times the equivalent diameter of the nozzle.

8. The aerosol injection cavity integrated module according to claim 1, characterized in that: The catalytic decomposition module (2) has an outer shell, comprising a hydrogen peroxide inlet (8), a pressing element (9), a distribution orifice plate (10), a catalytic bed (11), an outlet porous structure (12), and a hydrogen peroxide decomposition gas outlet (13) sequentially distributed in the outer shell from upstream to downstream; The hydrogen peroxide inlet (8) is connected to the outlet of the supply module (1) through a pipeline (5); the distribution orifice plate (10), the catalytic bed (11), and the outlet porous structure (12) are sequentially compressed and fixed in the outer shell from top to bottom by a compression element (9); the compression element (9) is a gasket or a spring; and the distribution orifice plate (10) is evenly distributed with a plurality of small holes that allow hydrogen peroxide to evenly enter the catalytic bed (11).

9. The aerosol injection cavity integrated module according to claim 8, characterized in that: The catalytic bed (11) is a porous structure of 40-70 pieces of 40-mesh silver mesh overlapping structure or a silver-plated nickel-based high-temperature alloy 3D printing, and the porous structure is a lattice structure with a porosity of 30% to 80%; The outlet porous structure (12) is a porous structure 3D-printed from a nickel-based high-temperature alloy, and the porous structure is a lattice structure or a straight pore structure.

10. A method for enhancing the flame stabilization of injection using the gas atomization injection cavity integrated module according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1, the supply module (1) transports liquid hydrogen peroxide to the hydrogen peroxide inlet (8) of the catalytic decomposition module (2) through the first pipeline (5), and then the hydrogen peroxide flows through the distribution orifice plate (10) in sequence and evenly passes through the catalytic bed (11). The outlet porous structure (12) provides a certain back pressure for the hydrogen peroxide flowing through the catalytic bed (11), so that the hydrogen peroxide is fully in contact with the silver mesh or the silver-plated porous structure in the catalytic bed (11), ensuring that the hydrogen peroxide is fully and completely catalytically decomposed into hydrogen peroxide high-temperature decomposition gas, that is, high-temperature oxygen and water vapor; S2, high-temperature oxygen and water vapor flow out from the hydrogen peroxide decomposition gas outlet (13) of the catalytic decomposition module (2), and generate a critical cross section at the throat of the sonic flowmeter (3), thereby achieving throttling of the high-temperature decomposition gas of hydrogen peroxide; S3, the high-temperature decomposition gas of hydrogen peroxide flowing out of the sonic flowmeter (3) enters the decomposition gas pipeline (7) through the second pipeline (6), and at the same time, kerosene flows through the kerosene inlet pipeline (14), the kerosene confluence chamber (15), and the kerosene pipeline (16), and then enters the decomposition gas pipeline (7) through the liquid inlet hole (17), and is mixed with the high-temperature oxygen and water vapor in the decomposition gas pipeline (7), forming aerated atomized kerosene (24) aerated and atomized by the high-temperature oxygen and water vapor; S4, the kerosene (24) atomized by high-temperature oxygen and water vapor is laterally ejected upstream of the cavity (19) through the atomized kerosene nozzle hole (18), and forms an atomized kerosene transverse jet (25) in the supersonic combustion chamber; S5. The difference in air flow velocity between the main flow (26) of the supersonic combustion chamber and the concave cavity (19) forms a concave cavity shear layer (27) at the front end surface (21) of the concave cavity. A portion of the oxygen-enriched atomized kerosene transverse jet (25) oscillates through the concave cavity shear layer (27) and enters the concave cavity (19). It burns in the concave cavity (19) to form a high-temperature, oxygen-enriched, low-speed recirculation zone (28), thereby widening the flame stabilization range.

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