A gas-solid two-phase supersonic flame generating device

Abstract

The present invention relates to a gas-solid two-phase supersonic flame generating device, comprising: a generator body, a Rafale nozzle connected to the generator body; the generator body comprises: a coaxial feeding section, a combustion chamber section, and a particle heating section that are coaxially and sequentially arranged; the Rafale nozzle is connected to the end of the particle heating section away from the combustion chamber section; the coaxial feeding section is provided with a fuel input structure, an oxidant input structure, and a powder input structure; the combustion chamber section is provided with a spark plug, and the spark plug is located at the end of the combustion chamber section connected to the particle heating section; the particle heating section is provided with a temperature sensor and a pressure sensor. The present invention utilizes the high-temperature gas generated by the supersonic flame to effectively extend the heating time of the powder particles without introducing any new devices, thereby fully achieving the purpose of providing molten particles.

Description

Technical Field

[0001] The present invention relates to the technical field of supersonic flame spraying, in particular to a gas-solid two-phase supersonic flame generating device. Background Art

[0002] Supersonic flame spraying (SVOF) is a technology that uses high-speed molten particles to produce high-performance coatings. The combustion of a fuel and an oxidizer releases heat to generate high-temperature, high-pressure combustion gases, which are then expanded and accelerated through a Rafale nozzle to form a supersonic, high-temperature gas flow. The spray material (typically 15-60 micron solid powder particles) is heated and accelerated by the supersonic, high-temperature gas flow before being sprayed onto the substrate surface to form a high-performance coating. However, the acceleration of the high-temperature, high-pressure, high-velocity gas in SVOF spraying can result in a short heating time for the powder particles, preventing them from reaching a semi-molten state before contacting the substrate, making it difficult for the powder particles to adhere to the target location. Currently, there are three common solutions: a. increasing the flame temperature to accelerate the melting point of the powder particles; b. increasing the length of the Rafale nozzle; and c. adding an additional heating device. Among them, for method a, it is easy to cause the powder particles to over-melt, making it difficult to produce the corresponding spraying effect; for method b, extending the Rafale nozzle will increase the volume of the generating device and increase the wall erosion pressure; for method c, the additional heating device inevitably increases the complexity of the device. For example, Chinese patent CN214168099U discloses a secondary heating device for a supersonic flame spray gun, which is provided with a heating coil at the outlet of the spray gun. It does not come into direct contact with the powder particles and the spraying flame, but can directly perform secondary heating on the powder particles to increase the degree of powder melting. However, this device increases the volume of the supersonic flame generating device, reduces its operational flexibility, and makes it impossible to operate in a small space environment; secondly, the additional electric heating coil provides secondary heating energy for the particles, resulting in increased energy consumption and reduced overall operational safety; finally, the electric heating coil is directly exposed to the high-temperature airflow, and its thermal protection problem needs to be solved to avoid the disadvantage of its low service life. Summary of the Invention

[0003] The purpose of the present invention is to provide a gas-solid two-phase supersonic flame generating device, which is used to solve the problems of low spraying efficiency, large powder consumption and high spraying cost caused by the short heating time of powder particles in traditional flame generating devices and the failure to reach a semi-molten state, resulting in the particles being bounced off when they come into contact with the substrate.

[0004] To achieve the above-mentioned object of the invention, the present invention provides a gas-solid two-phase supersonic flame generating device, characterized in that it comprises: a generator body, a Rafale nozzle connected to the generator body;

[0005] The generator body comprises: a coaxial feeding section, a combustion chamber section and a particle heating section which are coaxially and sequentially arranged;

[0006] The Rafale nozzle is connected to an end of the particle heating section away from the combustion chamber section;

[0007] The coaxial feeding section is provided with a fuel input structure, an oxidant input structure and a powder input structure;

[0008] The combustion chamber section is provided with a spark plug, and the spark plug is located at one end of the combustion chamber section connected to the particle heating section;

[0009] The particle heating section is provided with a temperature sensor and a pressure sensor.

[0010] According to one aspect of the present invention, the coaxial feeding section comprises: a feeding section body, a first tube body and a second tube body;

[0011] The feeding section body is provided with a hollow accommodating cavity; wherein one end of the accommodating cavity is closed and the other end is open;

[0012] The diameter of the first tube body is greater than the diameter of the second tube body, and the first tube body and the second tube body are coaxially fixed at the closed end of the accommodating cavity;

[0013] A first annular channel is formed between the first tube body and the accommodating cavity;

[0014] A second annular channel is formed between the first tube body and the second tube body;

[0015] The hollow portion of the second tube forms a middle channel;

[0016] The oxidant input structure is communicated with the first annular channel, the fuel input structure is communicated with the second annular channel, and the powder input structure is communicated with the intermediate channel.

[0017] According to one aspect of the present invention, the diameter of the opening end of the accommodating cavity is gradually reduced in a direction approaching the combustion chamber section;

[0018] The minimum opening area of ​​the open end of the accommodating cavity is smaller than the sum of the outlet areas of the middle channel, the first annular channel, and the second annular channel.

[0019] According to one aspect of the present invention, the combustion chamber segment comprises: a combustion segment body;

[0020] The combustion section body is provided with a hollow combustion chamber; wherein the combustion chamber passes through both axial ends of the combustion section body;

[0021] The inlet end of the combustion chamber is connected to the open end of the accommodating cavity;

[0022] The spark plug extends into the combustion chamber.

[0023] According to one aspect of the present invention, the combustion chamber is an expansion-type flow channel with a radial size gradually increasing in a direction away from the coaxial feeding section.

[0024] According to one aspect of the present invention, the particle heating section includes: a heating section body;

[0025] The heating section body is provided with a hollow heating cavity; wherein the heating cavity passes through both axial ends of the heating section body;

[0026] The inlet end of the heating chamber is connected to the outlet end of the combustion chamber;

[0027] The heating chamber comprises: a flow channel portion with a constant cross section and a flow channel portion with a contracted cross section;

[0028] The temperature sensor and the pressure sensor are respectively arranged on the equal-section flow channel portion;

[0029] The opening area of ​​the inlet end of the combustion chamber is larger than the opening area of ​​the outlet end of the contraction cross-section flow passage portion.

[0030] According to one aspect of the present invention, a plurality of cooling water channels are provided on the side wall of the generator body;

[0031] The length direction of the cooling water channel is parallel to the axial direction of the generator body;

[0032] A plurality of cooling water channels are arranged at equal intervals along the circumference of the generator body;

[0033] In the circumferential direction of the generator body, adjacent cooling water channels are connected end to end.

[0034] According to one aspect of the present invention, the Rafale nozzle is detachably connected to the generator body, and a sealing gasket is provided between the Rafale nozzle and the generator body.

[0035] According to one aspect of the present invention, the sealing gasket is a copper sealing gasket.

[0036] According to one aspect of the present invention, along the axial direction of the generator body, the interval angle between the fuel input structure and the oxidant input structure is 180°;

[0037] Along the axial direction of the generator body, the fuel input structure is connected to the closed end of the second annular channel, and the oxidant input structure is connected to the closed end of the first annular channel;

[0038] The powder input structure is arranged coaxially with the generator body.

[0039] According to one solution of the present invention, the oxidizer and fuel can fully heat the powder particles during the complete combustion process in the generator body, and then the high-temperature gas formed can be further accelerated to a supersonic airflow through the provided Rafale nozzle. The heated and melted powder particles are effectively accelerated to the required speed through the supersonic airflow, achieving an output speed that fully meets the required requirements.

[0040] According to one solution of the present invention, the design of the contraction-type flow channel at the open end of the accommodating chamber of the present invention effectively realizes the mixing and acceleration between the three components, fully ensures the mixing effect, and more conveniently realizes the ignition of the oxidizer and the fuel, and enables the powder uniformly mixed therein to be more fully preliminarily heated.

[0041] According to one solution of the present invention, the present invention utilizes high-temperature gas generated by a supersonic flame to effectively extend the heating time of powder particles without introducing any new equipment, thereby fully achieving the purpose of providing molten particles.

[0042] According to one solution of the present invention, high-temperature combustion gas generated by the combustion of oxidant and fuel is used to heat particles. By designing a particle heating chamber in a supersonic flame spray gun, the residence time of the particles in the high-temperature combustion gas is increased, thereby providing semi-molten particles that meet the spraying requirements.

[0043] According to one solution of the present invention, a coaxial first tube body and a second tube body are arranged in the accommodating chamber, so that three coaxial delivery channels can be formed by means of the side wall of the accommodating chamber, thereby enabling the coaxial input of the oxidant, fuel and powder, greatly improving the uniformity of the input directions of the three materials, thereby making it easier to achieve mixed input of the three materials by being opposite to the open end of the accommodating chamber.

[0044] According to one solution of the present invention, the present invention can more easily achieve sufficient mixing of fuel and powder particles at the output position by surrounding the middle channel for conveying powder particles with the second annular channel for conveying fuel. Furthermore, by surrounding the second annular channel with the first annular channel for conveying oxidant, the oxidant can be more fully distributed around the mixed material, which is more conducive to the full ignition of the mixed material.

[0045] According to one solution of the present invention, the design of the contraction-type flow channel at the open end of the accommodating chamber of the present invention effectively realizes the mixing and acceleration between the three components, fully ensures the mixing effect, and more conveniently realizes the ignition of the oxidizer and the fuel, and enables the powder uniformly mixed therein to be more fully preliminarily heated.

[0046] According to one solution of the present invention, high-temperature combustion gas generated by the combustion of oxidant and fuel is used to heat powder particles. Through a further designed heating chamber, the residence time of the powder particles in the high-temperature combustion gas is effectively increased, thereby providing semi-molten particles that meet the spraying requirements.

[0047] According to one solution of the present invention, this solution adopts a convergent-expanded-equal cross-section-convergent-expanded internal flow channel arrangement in sequence along the flow direction to realize the mixing-acceleration-deceleration-acceleration process between the three components, so that the present invention has better working performance.

[0048] According to one solution of the present invention, this solution can make full use of the high-temperature gas generated by the supersonic flame, and extend the heating time of the powder particles without introducing any new equipment, so as to achieve the purpose of providing molten particles; in addition, the present invention adopts an integrated integrated design, which has a simple structure and is easy to process and manufacture, effectively reducing the spraying cost and improving the spraying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 is a perspective view schematically showing a gas-solid two-phase supersonic flame generating device according to one embodiment of the present invention;

[0050] Figure 2 is a cross-sectional view schematically showing a gas-solid two-phase supersonic flame generating device according to one embodiment of the present invention;

[0051] Figure 3 1 is a schematic diagram illustrating the arrangement of cooling water channels in a gas-solid two-phase supersonic flame generating device according to an embodiment of the present invention;

[0052] Figure 4 Schematically shows temperature-time curves obtained under two working conditions of an embodiment of a gas-solid two-phase supersonic flame generating device according to an embodiment of the present invention;

[0053] Figure 5 Schematically shows the pressure-time curves obtained under two working conditions of the gas-solid two-phase supersonic flame generating device according to one embodiment of the present invention. DETAILED DESCRIPTION

[0054] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0055] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0056] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not limited to the following embodiments.

[0057] Combine Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, a gas-solid two-phase supersonic flame generating device of the present invention includes: a generator body 1, a Rafale nozzle 2 connected to the generator body 1; in this embodiment, the generator body 1 includes: a coaxial feeding section 11, a combustion chamber section 12, and a particle heating section 13 that are coaxial and arranged in sequence; wherein the coaxial feeding section 11, the combustion chamber section 12, and the particle heating section 13 can be set as an integral whole to achieve reliable stability of the entire structure. In this embodiment, the Rafale nozzle 2 is connected to the end of the particle heating section 13 away from the combustion chamber section 12; wherein the Rafale nozzle 2 and the particle heating section 13 can be provided with mutually connected flanges to achieve a detachable connection between each other through a threaded connector.

[0058] Through the above arrangement, the oxidizer and fuel are fully heated in the generator body 1 during the combustion process. The resulting high-temperature gas is then accelerated to a supersonic flow rate through the Rafale nozzle 2. The heated and melted powder particles are effectively accelerated to the desired velocity by the supersonic flow, achieving an output velocity that fully meets the required requirements. Furthermore, the particle heating section 13 can be used to reduce the gas velocity and increase the residence time of the powder particles in the high-temperature combustion gas. This improves the probability of powder particle melting without the need for additional heating equipment or increasing the size of the Rafale nozzle 2.

[0059] In this embodiment, the coaxial feeding section 11 is provided with a fuel input structure 111, an oxidant input structure 112 and a powder input structure 113; the combustion chamber section 12 is provided with a spark plug 121, and the spark plug 121 is located at one end where the combustion chamber section 12 is connected to the particle heating section 13; the particle heating section 13 is provided with a temperature sensor 131 and a pressure sensor 132.

[0060] Combine Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, the coaxial feed section 11 includes: a feed section body 11a, a first tube 11b, and a second tube 11c. The feed section body 11a is provided with a hollow accommodating chamber 11a1. One end of the accommodating chamber 11a1 is closed and the other end is open. In this embodiment, the diameter of the first tube 11b is larger than the diameter of the second tube 11c, and the first tube 11b and the second tube 11c are coaxially fixed to the closed end of the accommodating chamber 11a1. A first annular channel is formed between the first tube 11b and the accommodating chamber 11a1; a second annular channel is formed between the first tube 11b and the second tube 11c; and the hollow portion of the second tube 11c forms an intermediate channel. In this embodiment, the oxidant input structure 112 is connected to the first annular channel, the fuel input structure 111 is connected to the second annular channel, and the powder input structure 113 is connected to the intermediate channel.

[0061] Through the above-mentioned arrangement, the present invention arranges a coaxial first tube body 11b and a second tube body 11c in the accommodating chamber 11a1, so as to form three coaxial conveying channels by means of the side wall of the accommodating chamber 11a1, thereby enabling the coaxial input of the oxidant, fuel and powder, greatly improving the uniformity of the input directions of the three materials, and thus making it easier to achieve mixed input of the three materials by being opposite to the open end of the accommodating chamber 11a1.

[0062] In addition, the present invention can more easily achieve sufficient mixing of fuel and powder particles at the output position by surrounding the middle channel for conveying powder particles with the second annular channel for conveying fuel. Furthermore, by surrounding the second annular channel with the first annular channel for conveying oxidant, the oxidant can be more fully distributed around the mixed material, which is more conducive to the full ignition of the mixed material.

[0063] Combine Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, the diameter of the opening end of the accommodating cavity 11a1 is gradually reduced in the direction approaching the combustion chamber segment 12.

[0064] Through the above-mentioned arrangement, the design of the contraction-type flow channel at the open end of the accommodating chamber 11a1 of the present invention effectively realizes the mixing and acceleration between the three components, fully ensures the mixing effect, and more conveniently realizes the ignition of the oxidizer and the fuel, and allows the powder uniformly mixed therein to be more fully preliminarily heated.

[0065] Furthermore, the minimum opening area of ​​the open end of the accommodating chamber 11a1 is smaller than the sum of the outlet areas of the intermediate channel, the first annular channel and the second annular channel, wherein the minimum opening area of ​​the open end of the accommodating chamber 11a1 is the inlet area of ​​the combustion chamber. Therefore, through the above-mentioned setting, congestion is formed at the position of the inlet of the combustion chamber, which is more beneficial to improving the working performance of the present invention.

[0066] Combine Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, the combustion chamber segment 12 includes a combustion segment body 12a, wherein the combustion segment body 12a is provided with a hollow combustion chamber, wherein the combustion chamber extends through both axial ends of the combustion segment body 12a. In this embodiment, the inlet end of the combustion chamber is connected to the open end of the accommodating cavity 11a1, and the spark plug extends into the combustion chamber.

[0067] Combine Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, the combustion chamber is an expansion-type flow channel with gradually increasing radial dimensions in a direction away from the coaxial feeding section 11. With the above arrangement, the combustion chamber is configured as an expansion-type flow channel, which can conveniently form a supersonic airflow and achieve sufficient acceleration of the powder particles.

[0068] Combine Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, the pellet heating section 13 comprises a heating section body 13a, wherein the heating section body 13a is provided with a hollow heating chamber, wherein the heating chamber extends through both axial ends of the heating section body 13a. In this embodiment, the inlet end of the heating chamber is connected to the outlet end of the combustion chamber. The heating chamber includes a uniform cross-sectional flow channel portion 13a11 and a converging cross-sectional flow channel portion 13a12. In this embodiment, a temperature sensor and a pressure sensor are respectively disposed in the uniform cross-sectional flow channel portion 13a11.

[0069] Through the above-mentioned arrangement, the present invention sets the heating chamber as a combination of a uniform cross-sectional flow channel portion 13a11 and a contraction cross-sectional flow channel portion 13a12, and can achieve deceleration of the high-temperature gas after combustion at this location through the uniform cross-sectional flow channel portion 13a11, so as to further increase the heating time of the powder particles in the high-temperature gas.

[0070] In this embodiment, the contraction cross-section flow channel portion 13a12 can adopt a spherical ring surface or a conical ring surface to achieve a gradual reduction in diameter, wherein the opening area of ​​the inlet end of the combustion chamber is larger than the opening area of ​​the outlet end of the contraction cross-section flow channel portion 13a12, so as to form a secondary congestion here, thereby further improving the efficiency of the powder particles being melted and realizing the rapid output of the powder particles after melting.

[0071] Combine Figure 1 、 Figure 2 and Figure 3 As shown, according to one embodiment of the present invention, a plurality of cooling water channels 1a are provided on the side wall of the generator body 1; wherein, the length direction of the cooling water channels 1a is arranged parallel to the axial direction of the generator body 1; in this embodiment, along the circumference of the generator body 1, a plurality of cooling water channels 1a are arranged at equal intervals; wherein, in the circumferential direction of the generator body 1, adjacent cooling water channels 1a are arranged to be connected end to end.

[0072] In this embodiment, to facilitate the flow of cooling water into the cooling water channel 1a, a cooling water input structure 1b and a cooling water output structure 1c may be further provided on the side wall of the generator body 1. Furthermore, by interconnecting multiple cooling water channels 1a end to end, the cooling water input structure 1b and the cooling water output structure 1c may be arranged in close proximity, thereby facilitating connection to the cooling water supply device.

[0073] Combine Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, the Rafale nozzle 2 is detachably connected to the generator body 1, and a sealing gasket is provided between the Rafale nozzle 2 and the generator body 1. In this embodiment, the sealing gasket is a copper sealing gasket.

[0074] Combine Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, along the axial direction of the generator body 1, the interval angle between the fuel input structure 111 and the oxidant input structure 112 is 180°.

[0075] Combine Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, along the axial direction of the generator body 1, the fuel input structure 111 is connected to the closed end of the second annular channel, and the oxidizer input structure 112 is connected to the closed end of the first annular channel; the powder input structure 113 is coaxially arranged with the generator body 1.

[0076] In order to further illustrate the technical effect of this scheme, its working conditions are illustrated with examples.

[0077] Example

[0078] Two operating conditions of the gas-solid two-phase supersonic flame generating device were set, wherein the operating pressure of the first operating condition was set at 0.8 MPa and the operating pressure of the second operating condition was set at 1.5 MPa, thereby comparing the performance of the present invention under a wide range of high temperature and high pressure conditions and obtaining the corresponding temperature and pressure curves. Figure 4 and Figure 5 Figure 2 shows the temperature and pressure curves of the gas-solid two-phase supersonic flame generator under two operating conditions. It is clear that this supersonic flame spray gun, which increases the powder particle heating time, can effectively provide a high-temperature environment with the required spray parameters, achieving the design expectations. The gas-solid two-phase supersonic flame generator of the present invention can still operate stably for a long time under extreme conditions of high temperature and pressure. The spray parameters are in a high-temperature environment of 1500K to 1600K, which can meet the requirements for preparing high-wear-resistant coatings on tungsten carbide (WC), titanium carbide (TiC), aluminum oxide (Al2O3), and chromium oxide (Cr2O3).

[0079] The above contents are merely examples of specific solutions of the present invention. For devices and structures not described in detail, it should be understood that they can be implemented by adopting general devices and methods available in the art.

[0080] The above description is merely one embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A gas-solid two-phase supersonic flame generating device, characterized in that: include: A generator body (1), a Rafale nozzle (2) connected to the generator body (1); The generator body (1) comprises: a coaxial feeding section (11), a combustion chamber section (12) and a particle heating section (13) which are coaxially and sequentially arranged; The Rafale nozzle (2) is connected to an end of the particle heating section (13) away from the combustion chamber section (12); The coaxial feeding section (11) is provided with a fuel input structure (111), an oxidant input structure (112) and a powder input structure (113); The combustion chamber section (12) is provided with a spark plug, and the spark plug is located at one end of the combustion chamber section (12) connected to the particle heating section (13); The particle heating section (13) is provided with a temperature sensor and a pressure sensor; The particle heating section (13) comprises: a heating section main body (13a); The heating section body (13a) is provided with a hollow heating cavity; wherein the heating cavity passes through both axial ends of the heating section body (13a); The inlet end of the heating chamber is connected to the outlet end of the combustion chamber; The heating chamber comprises: a flow channel portion with a constant cross-section (13a11) and a flow channel portion with a contracted cross-section (13a12); The temperature sensor and the pressure sensor are respectively arranged on the equal-section flow channel portion (13a11); The opening area of ​​the inlet end of the combustion chamber is larger than the opening area of ​​the outlet end of the contraction cross-section flow channel portion (13a12).

2. The gas-solid two-phase supersonic flame generating device according to claim 1, characterized in that: The coaxial feeding section (11) comprises: a feeding section main body (11a), a first tube body (11b) and a second tube body (11c); The feeding section body (11a) is provided with a hollow accommodating cavity (11a1); wherein one end of the accommodating cavity (11a1) is closed and the other end is open; The diameter of the first tube body (11b) is greater than the diameter of the second tube body (11c), and the first tube body (11b) and the second tube body (11c) are coaxially fixed at the closed end of the accommodating cavity (11a1); A first annular channel is formed between the first tube body (11b) and the accommodating cavity (11a1); A second annular channel is formed between the first tube body (11b) and the second tube body (11c); The hollow portion of the second tube (11c) forms a middle channel; The oxidant input structure (112) is connected to the first annular channel, the fuel input structure (111) is connected to the second annular channel, and the powder input structure (113) is connected to the intermediate channel.

3. The gas-solid two-phase supersonic flame generating device according to claim 2, characterized in that: The diameter of the opening end of the accommodating cavity (11a1) is gradually reduced in a direction approaching the combustion chamber section (12); The minimum opening area of ​​the opening end of the accommodating cavity (11a1) is smaller than the sum of the outlet areas of the intermediate channel, the first annular channel, and the second annular channel.

4. The gas-solid two-phase supersonic flame generating device according to claim 3, characterized in that: The combustion chamber section (12) comprises: a combustion section body (12a); The combustion section body (12a) is provided with a hollow combustion chamber; wherein the combustion chamber passes through both axial ends of the combustion section body (12a); The inlet end of the combustion chamber is connected to the open end of the accommodating cavity (11a1); The spark plug extends into the combustion chamber.

5. The gas-solid two-phase supersonic flame generating device according to claim 4, characterized in that: In a direction away from the coaxial feeding section (11), the combustion chamber is an expansion-type flow channel with a gradually increasing radial size.

6. The gas-solid two-phase supersonic flame generating device according to claim 5, characterized in that: A plurality of cooling water channels (1a) are provided on the side wall of the generator body (1); The cooling water channel (1a) is arranged in a length direction parallel to the axial direction of the generator body (1); Along the circumference of the generator body (1), a plurality of cooling water channels (1a) are arranged at equal intervals; In the circumferential direction of the generator body (1), adjacent cooling water channels (1a) are arranged to be connected end to end.

7. The gas-solid two-phase supersonic flame generating device according to claim 6, characterized in that: The Rafale nozzle (2) is detachably connected to the generator body (1), and a sealing gasket is provided between the Rafale nozzle (2) and the generator body (1).

8. The gas-solid two-phase supersonic flame generating device according to claim 7, characterized in that: The sealing gasket is a copper sealing gasket.

9. The gas-solid two-phase supersonic flame generating device according to claim 8, characterized in that: Along the axial direction of the generator body (1), the interval angle between the fuel input structure (111) and the oxidant input structure (112) is 180°; Along the axial direction of the generator body (1), the fuel input structure (111) is connected to the closed end of the second annular channel, and the oxidant input structure (112) is connected to the closed end of the first annular channel; The powder input structure (113) is coaxially arranged with the generator body (1).

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