Controllable scramjet engine and working method thereof

Abstract

The invention discloses a controllable scramjet engine and a working method thereof, and belongs to the field of scramjet engines, the controllable scramjet engine comprises a supersonic combustion chamber and a controllable fuel gas generator arranged on the outer wall of the supersonic combustion chamber, and the output end of the controllable fuel gas generator communicates with the input end of the supersonic combustion chamber through a regeneration cooling pipeline; the regenerative cooling pipeline is arranged on the wall surface of a tail nozzle of the supersonic combustion chamber; the controllable fuel gas generator comprises a main body, fuel filled in the main body and an electric pyrolysis mechanism used for pyrolyzing the fuel. By the adoption of the controllable scramjet engine and the working method thereof, pyrolysis gas serves as fluidizing gas and carries powder fuel to be injected, the specific impulse performance of the engine is effectively enhanced, fuel gas fuel can serve as ignition fuel, combustion pressurization and temperature rising are conducted firstly, then high-energy powder particles are sprayed out in a flow carrying mode, and the problems that the retention time of the powder fuel in a combustion chamber is short, and the combustion efficiency is high are solved. The combustion efficiency is low.

Description

Technical Field

[0001] The present invention relates to the technical field of scramjet engines, and in particular to a controllable scramjet engine and a working method thereof. Background Art

[0002] Hypersonic vehicles have broad application prospects in the fields of national defense and space transportation. In recent years, high Mach number and wide range have become the main research directions for the development of hypersonic vehicles. For hypersonic weapons, the most important thing is to develop a power system that matches them. As the main component of hypersonic vehicles, the power unit is the key technology that determines the development of hypersonic vehicles.

[0003] Scramjets can be divided into liquid fuel scramjets and solid fuel scramjets according to the type of fuel used. Compared with liquid fuel scramjets, solid fuel scramjets have the advantages of simple structure, high specific impulse, solid fuel, simple fuel supply, reliance on oxygen in the air for combustion, safe storage and transportation, low cost, high reliability and rapid combat response. It is a high-density fuel that can be stored for a long time, and has a natural advantage in missile use. It is one of the main development directions of low-cost and long-range suppression ammunition for the future military, and also has great application potential in the field of artillery range extension.

[0004] Since the working process of solid fuel ramjet engines is very complicated, involving gas dynamics, thermodynamics, combustion, etc., there are still some problems to be solved. For example, 1. The ignition and combustion performance of oxygen-poor propellants is very complicated, the flame stability is poor, and flameout is prone to occur; although the addition of metal particles to the propellant can significantly increase the density and specific impulse, the combustion efficiency is low and it is easy to agglomerate. When the metal particles agglomerate into the flow field, it will cause two-phase loss, slag deposition and erosion enhancement, etc., which will have a great impact on the solid fuel burning rate due to the airflow and heat transfer process; 2. When the solid fuel ramjet engine is working, due to the high temperature and high pressure environment in the combustion chamber, extremely high temperatures will be generated, which will cause great thermal stress and thermal damage to the structural materials and internal components of the engine, and bring challenges to the thermal protection structure.

[0005] In summary, existing solid fuel ramjet engines have problems such as the inability to actively cool the solid fuel, the inability to fully utilize the advantages of the solid fuel, and the poor controllability of the solid oxygen-depleted propellant fuel. Summary of the invention

[0006] The purpose of the present invention is to provide a controllable scramjet engine and a working method thereof to solve the above technical problems.

[0007] To achieve the above-mentioned object, the present invention provides a controllable scramjet engine, comprising a supersonic combustion chamber, a controllable gas generator arranged on the outer wall of the supersonic combustion chamber, the output end of the controllable gas generator is connected to the input end of the supersonic combustion chamber through a regenerative cooling pipeline, and the regenerative cooling pipeline is arranged on the wall surface of the tail nozzle of the supersonic combustion chamber;

[0008] The controllable gas generator comprises a main body, fuel filled in the main body and an electric pyrolysis mechanism for pyrolyzing the fuel.

[0009] Preferably, the fuel is solid polyethylene, and the electric pyrolysis mechanism includes a heating electrode arranged on one side of the fuel and a first DC regulated power supply electrically connected to the heating electrode. A propulsion unit is also arranged on the other side of the fuel for pressing the fuel onto the heating electrode.

[0010] Preferably, the propulsion unit comprises a push plate, a compression spring arranged on a side of the push plate away from the fuel, and a guide cylinder for guiding the compression spring, wherein the guide cylinder is fixed inside the body;

[0011] Alternatively, the propulsion unit includes a push plate, a nitrogen-filled propulsion chamber arranged on the side of the push plate away from the fuel, a pressure reducing valve and a nitrogen gas source which are sequentially connected to the nitrogen-filled propulsion chamber.

[0012] Preferably, the heating electrode is a porous structure with a plurality of through holes on the electrode plate;

[0013] Alternatively, the heating electrode is a mesh structure woven from resistance wires;

[0014] Alternatively, a center hole is opened in the center of the heating electrode, an igniter or flame spray gun for a nitrogen atmosphere is provided on the main body, the outlet of the igniter or flame spray gun for a nitrogen atmosphere faces the center hole, and a plurality of through holes evenly arranged in a ring array are opened on the heating electrode and around the center hole.

[0015] Preferably, the heating electrode is an end-face combustion type electrode, and the resistance of the end-face combustion type electrode is equal to the internal resistance of the first DC regulated power supply.

[0016] Preferably, the fuel is powdered polyethylene, the electric pyrolysis mechanism comprises a porous pyrolysis chamber disposed inside the body, the porous pyrolysis chamber is electrically connected to the first DC regulated power supply, and the porous pyrolysis chamber is provided with a plurality of through holes in the direction of the output end of the controllable gas generator;

[0017] The porous pyrolysis chamber is filled with powdered polyethylene;

[0018] The resistance of the porous pyrolysis chamber is equal to the internal resistance of the first DC regulated power supply.

[0019] Preferably, the output gas flow rate of the controllable gas generator is 50 g / s-100 g / s, and the gas temperature is 300°C.

[0020] Preferably, a secondary gas heater is further provided between the controllable gas generator and the regenerative cooling pipeline, the secondary gas heater comprising a shell, a spiral resistance heating wire provided inside the shell, the spiral resistance heating wire being electrically connected to the second DC regulated power supply, and the resistance of the spiral resistance heating wire being equal to the internal resistance of the second DC regulated power supply;

[0021] Two ends of the secondary gas heater are respectively connected to the controllable gas generator and the regenerative cooling pipeline;

[0022] An insulating layer is provided inside the secondary gas heater.

[0023] A method for operating a controllable scramjet engine comprises the following steps: firstly, fuel is loaded, then an electric pyrolysis mechanism is connected, the fuel is pyrolyzed to generate 300°C pyrolysis gas, the 300°C pyrolysis gas passes through a regenerative cooling pipeline to absorb the heat of a tail nozzle of a supersonic combustion chamber, cools the controllable scramjet engine, raises the temperature, and finally passes into the supersonic combustion chamber for combustion;

[0024] The pyrolysis fuel gas is a fluidizing gas carrying powdered fuel.

[0025] A method for operating a controllable scramjet engine comprises the following steps: firstly, fuel is loaded, then an electric pyrolysis mechanism and a second DC regulated power supply are connected, the fuel is pyrolyzed to generate 300°C pyrolysis gas, the 300°C pyrolysis gas enters a secondary gas heater for secondary pyrolysis, then enters a regenerative cooling pipeline to absorb heat from a tail nozzle of a supersonic combustion chamber, cools the controllable scramjet engine, raises the temperature to 700°C, and finally enters a supersonic combustion chamber for combustion;

[0026] The pyrolysis fuel gas is a fluidizing gas carrying powdered fuel.

[0027] Therefore, the present invention adopts the above-mentioned controllable scramjet engine and its working method, which has the following beneficial effects:

[0028] 1. Efficient thermal management: Regenerative cooling design: The heat of the tail nozzle of the supersonic combustion chamber is absorbed through the regenerative cooling pipeline, which not only effectively reduces the temperature of the engine and prolongs the engine life, but also uses the waste heat to increase the temperature of the pyrolysis gas and improve the energy utilization efficiency;

[0029] Secondary gas heater: Secondary heating is performed on the pyrolysis gas before it enters the combustion chamber to ensure that the gas temperature reaches the optimal combustion condition (such as 700°C), thereby improving combustion efficiency and thrust;

[0030] 2. Fuel flexibility and controllability: Solid polyethylene or powdered polyethylene fuel can be used. The choice of these two fuels provides flexibility, and different forms of fuel can be selected according to specific needs; solid polyethylene is easy to store and transport, while powdered polyethylene is more conducive to the carrying and uniform distribution of fluidizing gas.

[0031] 3. By decomposing the fuel into high-temperature combustion gas by means of electric pyrolysis, the generation rate and temperature of the combustion gas can be precisely controlled, thus enhancing the controllability and response speed of the engine;

[0032] 4. Structural optimization and compact design: porous electrode and screen structure: The heating electrode adopts a porous structure or a screen structure, which increases the contact area between the fuel and the electrode, improves the pyrolysis efficiency, and ensures the uniform output of the gas;

[0033] End-face combustion electrode: This design makes resistance matching more accurate, reduces energy loss, and improves the efficiency of electric thermal decomposition;

[0034] Propulsion unit: Whether using a compression spring or a nitrogen-filled propulsion chamber, it ensures that the fuel can be evenly and continuously supplied to the heating electrode, avoiding the problem of uneven fuel supply;

[0035] 5. High reliability and safety: By precisely controlling the temperature and flow rate of pyrolysis gas (50g / s-100g / s), the stability and efficiency of the combustion process are ensured, and the occurrence of unstable phenomena such as flameout is reduced;

[0036] An insulating layer is set inside the secondary gas heater to effectively prevent heat loss, while also protecting the heating wire and other components from overheating damage, thereby improving the safety and stability of the system;

[0037] 6. Environmental protection and economy: Polyethylene is a relatively clean fuel, which produces less pollutants during combustion and meets environmental protection requirements;

[0038] Energy recovery: The waste heat of the tail nozzle is recovered through the regenerative cooling pipeline, which realizes the reuse of energy, reduces energy consumption and improves the overall economy;

[0039] In summary, the present invention adjusts the injection fuel equivalence ratio by regulating the electric heating power. The pyrolysis fuel gas can be actively cooled. Moreover, since the density of its high-polymer compound is greater than that of liquid kerosene, the volume of the aircraft can be effectively reduced under the same mass of fuel carried. At the same time, the pyrolysis gas contains various olefins, all of which have high calorific value and can effectively improve the specific impulse. The fuel gas can also carry high-energy metal powder, which can provide better performance. It can solve the problems that liquid fuel is inconvenient to carry and solid fuel cannot be actively cooled and is uncontrollable. It can also take advantage of the advantages of gas fuel, significantly improve the performance and reliability of the engine, and has broad application prospects.

[0040] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic structural diagram of a controllable scramjet engine of the present invention that uses a single controllable gas generator for pyrolysis;

[0042] Figure 2 It is a schematic structural diagram of a controllable scramjet engine of the present invention that uses a controllable gas generator combined with a secondary gas heater for pyrolysis;

[0043] Figure 3 This is a schematic structural diagram of a controllable gas generator using a compression spring as a propulsion mechanism as described in Example 1 of a controllable scramjet engine of the present invention;

[0044] Figure 4 This is a schematic structural diagram of a controllable gas generator using nitrogen as a propulsion mechanism as described in Example 1 of a controllable scramjet engine of the present invention;

[0045] Figure 5 This is a structural diagram of a heating electrode with a porous structure as described in Example 1 of a controllable scramjet engine of the present invention;

[0046] Figure 6 This is a structural diagram of a heating electrode of a screen structure described in Example 1 of a controllable scramjet engine of the present invention;

[0047] Figure 7 This is a schematic diagram of the structure of the nitrogen atmosphere igniter or flame spray gun assisted pyrolysis described in Example 1 of a controllable scramjet engine of the present invention;

[0048] Figure 8 This is a structural diagram of a heating electrode for igniter or flame spray gun assisted pyrolysis in a nitrogen atmosphere as described in Example 1 of a controllable scramjet engine of the present invention;

[0049] Fig. 9 This is a structural diagram of a secondary gas heater described in Example 1 of a controllable scramjet engine of the present invention;

[0050] Fig.10 This is a structural diagram of a controllable gas generator described in Example 2 of a controllable scramjet engine of the present invention;

[0051] Fig.11 This is a structural diagram of a porous pyrolysis chamber as described in Example 2 of a controllable scramjet engine of the present invention.

[0052] Reference numerals

[0053] 1. Controllable gas generator; 11. Main body; 12. Heating electrode; 121. Center hole; 13. Compression spring; 14. Guide cylinder; 15. Push plate; 16. Nitrogen inflation propulsion chamber; 17. Pressure reducing valve; 18. Nitrogen gas source; 19. Porous pyrolysis chamber; 110. Ignitor or flame spray gun for nitrogen atmosphere; 2. Supersonic combustion chamber; 3. Regeneration cooling pipeline; 4. Support plate; 5. Secondary gas heater; 51. Casing. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical scheme and advantages disclosed in the embodiments of the present invention clearer, the embodiments of the present invention are further described in detail in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present invention and are not used to limit the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0055] It should be noted that the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or server that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products or devices.

[0056] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0057] By pyrolyzing high-polymer compounds, the combustion gas carrying high-energy metal powders such as aluminum or boron is injected into the combustion chamber for combustion. The pyrolysis combustion gas can be used for active cooling. Moreover, since the density of the high-polymer compounds is greater than that of liquid kerosene, the volume of the aircraft can be effectively reduced under the same mass of fuel carried. In addition, the high-energy metal powder can provide a higher specific impulse, which has important academic value and engineering significance for the development of future hypersonic aircraft. The present invention is designed based on the above analysis.

[0058] Example 1

[0059] like Figure 1 as well as Figure 3-Figure 9As shown, a controllable scramjet engine comprises a supersonic combustion chamber 2, a controllable gas generator 1 arranged on the outer wall of the supersonic combustion chamber 2, the output end of the controllable gas generator 1 is connected to the input end of the supersonic combustion chamber 2 via a regenerative cooling pipe 3. In this embodiment, the regenerative cooling pipe 3 is directly connected to the supersonic combustion chamber 2 through the wall surface, or is connected to the supersonic combustion chamber 2 through a support plate 4, and the regenerative cooling pipe 3 is arranged on the wall surface of the tail nozzle of the supersonic combustion chamber 2; the controllable gas generator 1 comprises a main body 11, a fuel filled in the main body 11, and an electric pyrolysis mechanism for pyrolyzing the fuel.

[0060] The fuel is solid polyethylene, and the electric pyrolysis mechanism includes a heating electrode 12 arranged on one side of the fuel and a first DC regulated power supply DC1 electrically connected to the heating electrode 12. A propulsion unit is also arranged on the other side of the fuel to press the fuel onto the heating electrode 12 to ensure reliable pyrolysis.

[0061] The propulsion unit includes a push plate 15, a compression spring 13 arranged on the side of the push plate 15 away from the fuel, and a guide cylinder 14 for guiding the compression spring 13. The guide cylinder 14 is fixed inside the body to prevent the compression spring 13 from sliding left and right.

[0062] The propulsion unit includes a push plate 15 , a nitrogen-filled propulsion chamber 16 disposed on a side of the push plate 15 away from the fuel, a pressure reducing valve 17 and a nitrogen gas source 18 which are sequentially connected to the nitrogen-filled propulsion chamber 16 .

[0063] The heating electrode 12 is a porous structure with multiple through holes on the plate, which has the advantage of high mechanical strength, but has the disadvantage of small flow area; or, the heating electrode 12 is a mesh structure woven from resistance wire, which has the advantage of large flow area, but has the disadvantage of low mechanical strength; or, a center hole 121 is opened in the center of the heating electrode 12, and an igniter or flame spray gun 110 with nitrogen atmosphere is provided on the body, the outlet of the igniter or flame spray gun 110 with nitrogen atmosphere faces the center hole 121, and multiple through holes evenly arranged in a ring array are opened on the heating electrode 12 and around the center hole 121, which are used to circulate pyrolysis gas (combustible hydrocarbon gas). By combining the igniter such as a plasma igniter or flame spray gun with nitrogen atmosphere with the heating electrode 12, the size of the heating electrode 12 can be effectively reduced while ensuring uniform heating, thereby reducing the volume of the gas generator.

[0064] The heating electrode 12 is an end-face burning electrode, and the resistance of the end-face burning electrode is equal to the internal resistance of the first DC regulated power supply DC1. Considering the power loss of 0.8, the output power of the first DC regulated power supply DC1 is set to 50kw.

[0065] Example 2

[0066] like Fig.10 and Fig.11 As shown, the difference between Example 2 and Example 1 is that the fuel is powdered polyethylene, the electric pyrolysis mechanism includes a porous pyrolysis chamber 19 arranged inside the body, the porous pyrolysis chamber 19 is electrically connected to the first DC regulated power supply DC1, and the porous pyrolysis chamber 19 has a plurality of through holes toward the output end of the controllable gas generator 1; the porous pyrolysis chamber 19 is filled with powdered polyethylene; the resistance of the porous pyrolysis chamber 19 is equal to the internal resistance of the first DC regulated power supply DC1. Compared with solid polyethylene, it is easier to fill.

[0067] The output gas flow rate of the controllable gas generator 1 is 50 g / s-100 g / s, and the gas temperature is 300° C. In order to share the generation of the gas flow rate, a plurality of controllable gas generators 1 may be arranged in parallel in this embodiment.

[0068] A method for operating a controllable scramjet engine comprises the following steps: firstly, fuel is loaded, then an electric pyrolysis mechanism is connected, the fuel is pyrolyzed to generate 300°C pyrolysis gas, the 300°C pyrolysis gas passes through a regeneration cooling pipe 3 to absorb the heat of a tail nozzle of a supersonic combustion chamber 2, cools the controllable scramjet engine, and heats up, and finally passes into the supersonic combustion chamber 2 for combustion; wherein the pyrolysis gas is a fluidizing gas carrying powdered fuel.

[0069] like Figure 2 As shown, a secondary gas heater 5 is also arranged between the controllable gas generator 1 and the regeneration cooling pipeline 3. The secondary gas heater 5 includes a shell 51 and a spiral resistance heating wire arranged inside the shell 51. The spiral resistance heating wire is electrically connected to the second DC voltage-stabilized power supply DC2. The resistance of the spiral resistance heating wire is equal to the internal resistance of the second DC voltage-stabilized power supply DC2. The spiral resistance heating wire is arranged to fully contact the pyrolysis gas pressed by the gas generator so as to fully perform secondary pyrolysis and pyrolyze more gas fuels such as low-carbon olefins and alkanes; both ends of the secondary gas heater 5 are respectively connected to the controllable gas generator 1 and the regeneration cooling pipeline 3; an insulating heat insulation layer is arranged inside the secondary gas heater 5.

[0070] A method for operating a controllable scramjet engine comprises the following steps: firstly, fuel is loaded, then an electric pyrolysis mechanism and a second DC stabilized power supply DC2 are connected, the fuel is pyrolyzed to generate 300°C pyrolysis gas, the 300°C pyrolysis gas enters a secondary gas heater 5 for secondary pyrolysis, then enters a regeneration cooling pipe 3 to absorb heat from a tail nozzle of a supersonic combustion chamber 2, cools the controllable scramjet engine, and heats up to 700°C, and finally enters the supersonic combustion chamber 2 for combustion; wherein the pyrolysis gas is a fluidizing gas carrying powdered fuel.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A controllable scramjet engine, characterized in that: It comprises a supersonic combustion chamber, a controllable gas generator arranged on the outer wall of the supersonic combustion chamber, the output end of the controllable gas generator is connected to the input end of the supersonic combustion chamber through a regenerative cooling pipeline, and the regenerative cooling pipeline is arranged on the wall surface of the tail nozzle of the supersonic combustion chamber; The controllable gas generator comprises a main body, fuel filled in the main body and an electric pyrolysis mechanism for pyrolyzing the fuel.

2. A controllable scramjet engine according to claim 1, characterized in that: The fuel is solid polyethylene, and the electric pyrolysis mechanism includes a heating electrode arranged on one side of the fuel and a first DC regulated power supply electrically connected to the heating electrode. A propulsion unit is also arranged on the other side of the fuel for pressing the fuel onto the heating electrode.

3. A controllable scramjet engine according to claim 2, characterized in that: The propulsion unit includes a push plate, a compression spring disposed on a side of the push plate away from the fuel, and a guide cylinder for guiding the compression spring, wherein the guide cylinder is fixed inside the body; Alternatively, the propulsion unit includes a push plate, a nitrogen-filled propulsion chamber arranged on the side of the push plate away from the fuel, a pressure reducing valve and a nitrogen gas source which are sequentially connected to the nitrogen-filled propulsion chamber.

4. A controllable scramjet engine according to claim 3, characterized in that: The heating electrode is a porous structure with multiple through holes on the electrode plate; Alternatively, the heating electrode is a mesh structure woven from resistance wires; Alternatively, a center hole is opened in the center of the heating electrode, an igniter or flame spray gun for a nitrogen atmosphere is provided on the main body, the outlet of the igniter or flame spray gun for a nitrogen atmosphere faces the center hole, and a plurality of through holes evenly arranged in a ring array are opened on the heating electrode and around the center hole.

5. A controllable scramjet engine according to claim 4, characterized in that: The heating electrode is an end-face combustion type electrode, and the resistance of the end-face combustion type electrode is equal to the internal resistance of the first DC voltage-stabilized power supply.

6. A controllable scramjet engine according to claim 1, characterized in that: The fuel is powdered polyethylene, and the electric pyrolysis mechanism includes a porous pyrolysis chamber arranged inside the body, the porous pyrolysis chamber is electrically connected to the first DC regulated power supply, and the porous pyrolysis chamber is provided with a plurality of through holes in the direction of the output end of the controllable gas generator; The porous pyrolysis chamber is filled with powdered polyethylene; The resistance of the porous pyrolysis chamber is equal to the internal resistance of the first DC regulated power supply.

7. A controllable scramjet engine according to claim 1, characterized in that: The output gas flow rate of the controllable gas generator is 50g / s-100g / s, and the gas temperature is 300℃.

8. A controllable scramjet engine according to any one of claims 1 to 7, characterized in that: A secondary gas heater is also provided between the controllable gas generator and the regenerative cooling pipeline, the secondary gas heater comprises a shell, a spiral resistance heating wire arranged inside the shell, the spiral resistance heating wire is electrically connected to the second DC regulated power supply, and the resistance of the spiral resistance heating wire is equal to the internal resistance of the second DC regulated power supply; Two ends of the secondary gas heater are respectively connected to the controllable gas generator and the regenerative cooling pipeline; An insulating layer is provided inside the secondary gas heater.

9. A method for operating a controllable scramjet engine as described in claims 1 to 7, characterized in that: The following steps are involved: First, fuel is loaded, and then the electric pyrolysis mechanism is turned on to pyrolyze the fuel to produce 300°C pyrolysis gas. The 300°C pyrolysis gas absorbs the heat of the tail nozzle of the supersonic combustion chamber through the regeneration cooling pipeline, cools the controllable scramjet engine, and heats up, and finally enters the supersonic combustion chamber for combustion; The pyrolysis fuel gas is a fluidizing gas carrying powdered fuel.

10. A method for operating a controllable scramjet engine according to claim 8, characterized in that: The method comprises the following steps: firstly, fuel is loaded, then an electric pyrolysis mechanism and a second DC regulated power supply are connected, the fuel is pyrolyzed to generate 300°C pyrolysis gas, the 300°C pyrolysis gas enters a secondary gas heater for secondary pyrolysis, then enters a regenerative cooling pipeline to absorb heat from a tail nozzle of a supersonic combustion chamber, cools a controllable scramjet engine, and heats up to 700°C, and finally enters a supersonic combustion chamber for combustion; The pyrolysis fuel gas is a fluidizing gas carrying powdered fuel.

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