Device and method for spraying aerosol in supersonic flight state

Abstract

The invention discloses a device and a method for spraying aerosol in a supersonic flight state. The device comprises a gas supply system, a secondary flow gas conveying pipeline, an aerosol particle feeding system, an aerosol powder feeding amount control system, an aerosol conveying pipeline, an aerosol conveying pipeline shielding cover, an aerosol nozzle, an aerosol nozzle angle adjusting device, an outer adjusting piece structure device and the like. The spatial distribution of aerosol particles can be freely regulated and controlled according to the actual flight Mach number, the aerosol spraying amount is regulated and controlled through an aerosol conveying valve, the aerosol spraying angle is regulated and controlled through an aerosol nozzle angle adjusting device, the inclination angle of an outer adjusting piece can be adjusted, and an ideal aerosol spatial distribution form is obtained; and the aerosol particle powder feeding amount is increased along with the increase of the flight Mach number through an aerosol powder feeding amount control system, so that the concentration of an aerosol shielding layer is improved, and the infrared inhibition ratio of supersonic flight at each detection angle is greatly improved.

Description

Technical Field

[0001] The invention relates to aerosol infrared stealth, in particular to a device and method for spraying aerosol in a supersonic flight state. Background Art

[0002] As an active emergency infrared countermeasure method, aerosol infrared stealth technology uses an additional air bleed device to spray micron- or nanometer-sized solid particles around the exhaust jet. Under the action of turbulent flow and air buoyancy, the particles are suspended and wrapped around the jet to form an aerosol shielding layer, which absorbs and scatters the strong infrared radiation of the exhaust nozzle thermal cavity and thermal jet, thereby reducing the transmitted infrared signal to achieve the purpose of infrared stealth.

[0003] The engine's exhaust system is a significant radiation source for combat aircraft, encompassing the nozzle's hot cavity and hot jet. With the rapid advancement of engine performance, the engine's thermal cycle temperature continues to rise, leading to a continuous increase in the infrared radiation intensity of the nozzle's hot cavity and hot jet. Furthermore, with the rapid advancement of infrared detection and guidance, combat aircraft face increasingly severe challenges in their survival. Conventional infrared radiation suppression methods, such as cooling high-temperature exhaust system components, exhaust plume mixing and cooling, and fuel additives, are unable to meet the growing demand for infrared stealth, especially for aircraft operating at supersonic speeds. Aerosol infrared stealth technology offers advantages such as minimal thrust loss, no change in aerodynamic characteristics, and rapid attenuation of tail-directed infrared radiation energy. Furthermore, it creates a smoke screen behind the combat aircraft that interferes with enemy infrared detection and guidance, thereby enabling the aircraft to escape from threatening environments and ensure battlefield survivability.

[0004] The spatial distribution characteristics of aerosol particles and the particles' own radiation attenuation properties are two primary factors influencing the effectiveness of aerosol infrared radiation suppression. For example, regions with different particle mass concentrations exhibit different infrared suppression effects, as do different particle materials. Under the same material properties, the spatial distribution characteristics of aerosol particles are the most important factor affecting aerosol infrared radiation suppression. During supersonic flight, the distribution of aerosol particles differs significantly from that observed in ground-based experiments. This is primarily due to the compression of the thermal jet and aerosol particles by the high-speed incoming flow. The faster the flight speed, the stronger the compression, resulting in a narrower aerosol dispersion range and a greater number of aerosol particles being heated by the thermal jet. Consequently, the infrared stealth suppression achieved during flight falls short of the satisfactory results observed in ground-based experiments. Therefore, a key technical challenge facing aerosol infrared stealth technology is whether to achieve a good aerosol distribution under the combined effects of the thermal jet and external high-speed incoming flow. Constructing an aerosol shield with a wide dispersion range, high particle concentration, and low particle temperature during supersonic flight has long been a challenge and bottleneck in supersonic flight aerosol infrared stealth technology. Summary of the Invention

[0005] Objective of the Invention: The objective of the present invention is to provide a device and method for spraying aerosol in a supersonic flight state, thereby significantly enhancing the infrared suppression effect of aerosol in a supersonic flight state.

[0006] Technical Solution: A device for spraying aerosol in a supersonic flight state includes a gas supply system, a secondary flow gas delivery pipeline, an aerosol particle feeding system for inputting particles, an aerosol powder feeding amount control system, an aerosol delivery pipeline, an aerosol delivery pipeline shielding cover, an aerosol injection nozzle, a spherical connection structure at the bottom end of the aerosol injection nozzle, an external adjusting vane structure device, and an exhaust nozzle; the aerosol particle feeding system includes a hopper, a rotating main shaft, and a motor; a first valve is provided on the secondary flow gas delivery pipeline; the aerosol powder feeding amount control system includes a collection unit for collecting the flight Mach number, a control unit for converting the flight Mach number into an electrical signal and regulating the motor speed and controlling the first valve through a frequency converter.

[0007] Furthermore, the aerosol particle feeding system further includes a blowing thin tube, the front end of the blowing thin tube communicates with the secondary flow gas delivery pipeline, and the end is above the rotating main shaft, for blowing out the aerosol particles adhering to the grooves of the rotating main shaft.

[0008] Furthermore, a second valve is provided on the connecting pipeline between the blowing thin tube and the secondary flow gas delivery pipeline, which is regulated by the aerosol powder feeding amount control system. As the motor speed increases, the control unit increases the opening degree of the second valve through the control unit, so that the induced air flow in the blowing thin tube increases. When the Mach number > 1, as the Mach number increases, the aerosol powder feeding amount control system regulates the motor speed to increase, and the powder feeding amount of aerosol particles increases; the aerosol powder feeding amount control system regulates the first valve on the secondary flow gas delivery pipeline to increase the secondary flow velocity in the delivery pipeline to prevent aerosol particles from depositing in the delivery pipe; the aerosol powder feeding amount control system regulates the second valve to increase the secondary flow flow rate in the blowing thin tube to blow out more aerosol particles adhering to the grooves of the main shaft.

[0009] Furthermore, the aerosol injection nozzle is a reducing nozzle composed of a hemispherical tapered section and an equal-diameter section, wherein the hemispherical tapered section is installed on the spherical connection structure and is connected to the aerosol delivery pipeline shielding cover through the spherical connection structure to achieve free rotation.

[0010] Furthermore, the external adjusting vane structure device is connected to the aeroengine fairing through a rotating shaft and covers above the aerosol injection nozzle, forming an adjustable low-pressure area with the outer wall surface of the expansion section of the axisymmetric exhaust nozzle; one end of the rotating shaft is fixed on the aeroengine fairing, and the other end is connected to the external adjusting vane structure device, enabling the external adjusting vane structure device to rotate around the rotating shaft.

[0011] Further, an aerosol nozzle angle adjustment device for adjusting the spraying angle of the aerosol spraying nozzle is installed on the outer adjusting piece structure device. One end of the aerosol nozzle angle adjustment device is connected to the aerosol spraying nozzle, and the other end is connected to the outer adjusting piece structure device, and it can rotate around both ends.

[0012] Further, the exhaust nozzle is of an axisymmetric structure. Sixteen aerosol spraying nozzles are evenly distributed on the side of the exhaust nozzle near the nozzle outlet and are connected to the end of the aerosol delivery pipeline; the aerosol delivery pipeline shielding cover includes two identical front and rear parts. The inner circle is circular and sleeved on the side of the exhaust nozzle, and the outer circle is hexagonal and forms a closed space with the aerosol delivery pipeline.

[0013] Further, four aerosol delivery valves are installed on the aerosol delivery pipeline to control the aerosol spraying amount around the axisymmetric exhaust nozzle.

[0014] The usage steps of the aerosol spraying device are as follows:

[0015] (1) The actual flight Mach number is processed into an electrical signal by the aerosol powder feeding amount control system, and the motor speed is adjusted through a frequency converter. Since the motor speed is proportional to the powder feeding amount of aerosol particles, the powder feeding amount is adjusted. When Ma ≤ 1, the motor maintains the basic speed n0; when Ma > 1, the motor speed n = n0[ln(Ma - 1) + 1], and the motor speed increases logarithmically with the increase of the flight Mach number; and as the powder feeding amount of aerosol particles increases, the aerosol powder feeding amount control system simultaneously regulates the valve of the secondary flow gas delivery pipeline to increase the gas delivery speed and prevent aerosol particles from depositing in the delivery pipeline and causing pipeline blockage;

[0016] (2) Regulate the spatial distribution state of aerosol particles according to the actual flight conditions. Control the aerosol particle injection amount around the axisymmetric exhaust nozzle and adjust the tilt angle of the outer adjusting vane structure device and the aerosol injection nozzle angle through the aerosol delivery valve. If the flight Mach number is small, control the aerosol delivery valve to reduce the aerosol injection amount. If the flight Mach number is large, control the aerosol delivery valve to increase the aerosol injection amount, and adjust the aerosol injection nozzle angle by adjusting the tilt angle of the outer adjusting vane structure device and the aerosol nozzle angle adjusting device to select an appropriate angle to regulate an aerosol shielding layer with a large shielding range, high aerosol particle concentration, and low aerosol particle temperature around the hot jet. During supersonic flight, as the Mach number increases, the engine nozzle expands to provide greater thrust. At this time, it is necessary to increase the tilt angle of the outer adjusting vane structure device. Due to the connection of the aerosol nozzle angle adjusting device, the aerosol injection nozzle is driven, increasing the aerosol injection angle, reducing the number of aerosol particles entrained into the tail flame and heated, improving the spatial distribution of the aerosol, and enabling better wrapping of the engine tail flame.

[0017] A method for spraying aerosol particles in a supersonic flight state according to the present invention includes the following steps:

[0018] (1) Install an aerosol particle spraying device around the expansion section of the aviation engine tail nozzle. By spraying aerosol particles, they are suspended and wrapped around the hot jet under the action of turbulent flow and air buoyancy to form an aerosol shielding layer, which absorbs, scatters, and shields the infrared radiation of the hot jet and the hot cavity, thereby achieving infrared stealth.

[0019] (2) The outer adjusting vane structure device above the aerosol nozzle in the flight state can form a low-pressure area. Under the action of the pressure difference force, it forces the aerosol particles to diffuse outward in the direction of the outer adjusting vane, while reducing the movement speed of the aerosol particles and accelerating the diffusion of the aerosol particles in all directions, effectively increasing the dispersion range of the aerosol particles in the flight state.

[0020] (3) Freely adjust the spatial distribution of aerosol particles according to the actual needs of different flight conditions. Regulate the aerosol injection amount of 16 aerosol nozzles evenly distributed around the axisymmetric nozzle through the aerosol delivery valve, adjust the inclination angle of the outer adjusting vane structure device, and adjust the injection angle of the aerosol nozzle by regulating the aerosol nozzle angle adjusting device. If the flight Mach number is small, reduce the injection amount of aerosol particles through the aerosol delivery valve; if the flight Mach number is large, increase the injection amount of aerosol particles through the aerosol delivery valve, and select appropriate angles by adjusting the inclination angle of the outer adjusting vane structure device and the injection angle of the aerosol injection nozzle to control an aerosol shielding layer with a large shielding range and low aerosol particle temperature around the aeroengine exhaust nozzle and the hot jet flow, so that the aerosol particles will not generate a large amount of additional self-infrared radiation.

[0021] (4) According to different flight Mach numbers, make the powder feeding amount of aerosol particles increase with the increase of the flight Mach number through the aerosol powder feeding control system. The aerosol powder feeding control system can process the actual flight Mach number into an electrical signal and adjust the motor speed through a frequency converter. Since the motor speed is proportional to the powder feeding amount of aerosol particles, the powder feeding amount is adjusted. When Ma ≤ 1, the motor maintains the basic speed n0; when Ma > 1, the motor speed n = n0[ln(Ma - 1) + 1], and the motor speed increases logarithmically with the increase of the flight Mach number. And as the powder feeding amount of aerosol particles increases, the aerosol powder feeding control system simultaneously regulates the valve of the secondary flow gas delivery pipeline to increase the transport air flow speed and prevent the aerosol particles from depositing in the delivery pipeline and causing pipeline blockage.

[0022] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0023] 1. The present invention realizes the formation of an aerosol shielding layer with a large shielding range, high aerosol particle concentration, and low aerosol particle temperature around the hot jet flow in the supersonic flight state. In addition, the aerosol delivery pipeline and the outer adjusting vane structure device play a good role in heat insulation shielding and heat insulation for the nozzle wall surface, so that the intensity of the infrared radiation signal emitted from the nozzle surface is also greatly reduced. Therefore, the infrared suppression effect of the aeroengine exhaust system is greatly improved.

[0024] 2. The present invention can freely adjust the spatial distribution of aerosol particles according to the actual flight conditions, regulate the aerosol injection amount of the aerosol injection nozzle through the aerosol delivery valve respectively, adjust the inclination angle of the outer adjusting vane structure device, and regulate the angle of the aerosol injection nozzle by adjusting the nozzle angle adjusting device to obtain an ideal aerosol spatial distribution pattern.

[0025] 3. The present invention automatically adjusts the powder feeding amount of aerosol particles according to the actual flight Mach number. When flying at supersonic speed, as the flight Mach number increases, the powder feeding amount of aerosol particles increases, so that the concentration of the aerosol particle shielding layer increases in the supersonic flight state, and the aerosol infrared suppression rate at each detection angle is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall schematic diagram of the device of the present invention.

[0027] Figure 2 It is a top view of the device of the present invention.

[0028] Figure 3 It is a detail view of the aerosol injection nozzle.

[0029] Figure 4 It is a right view of the device of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0031] As Figures 1 to 4 shown, a device for spraying aerosol in a supersonic flight state includes a gas supply system 1, a secondary flow gas delivery pipeline 2, an aerosol particle feeding system 3, an aerosol delivery pipeline 4, an aerosol delivery pipeline shielding cover 5, an aerosol injection nozzle 6, a spherical connection structure 7 at the bottom end of the aerosol injection nozzle, an outer adjusting vane structure device 8, and an aerosol powder feeding amount control system 19; the aerosol particle feeding system 3 for inputting aerosol particles is located between the secondary flow gas delivery pipeline 2 and the aerosol delivery pipeline 4; the aerosol delivery pipeline 4 is uniformly distributed on the side surface of the axisymmetric exhaust nozzle 13; the aerosol powder feeding amount control system 19 for controlling the powder feeding amount of aerosol particles is located between the secondary flow gas delivery pipeline 2 and the aerosol particle feeding system 3; the aerosol injection nozzles 6 are uniformly distributed on the side surface of the axisymmetric exhaust nozzle 13 near the nozzle outlet, with a total of sixteen, and are connected to the end of the aerosol delivery pipeline 4; the aerosol delivery pipeline shielding cover 5 includes two identical front and rear parts, the inner circle is circular and sleeved on the side surface of the axisymmetric exhaust nozzle 13, and the outer circle is hexagonal and forms a closed space with the aerosol delivery pipeline 4; the aerosol injection nozzle 6 is connected to the aerosol delivery pipeline shielding cover 5 by means of the spherical connection structure 7 and can rotate freely; the outer adjusting vane structure device 8 is connected to the aeroengine fairing 10 through a rotating shaft 9 and covers above the aerosol injection nozzle 6, forming an adjustable low-pressure area 14 with the outer wall surface of the expansion section of the axisymmetric exhaust nozzle 13.

[0032] Four aerosol delivery valves 11 are installed on the aerosol delivery pipeline 4 to control the aerosol injection amount around the axisymmetric exhaust nozzle 13. An aerosol nozzle angle adjustment device 12 for adjusting the injection angle of the aerosol injection nozzle 6 is installed above the outer vane structure device 8. The movable outer vane structure device 8 and the outer wall surface of the expansion section of the axisymmetric exhaust nozzle 13 form an adjustable low-pressure area. Under the action of the pressure difference force, the aerosol particles are forced to diffuse outward towards the outer vane direction. While reducing the movement speed of the aerosol particles, it also accelerates the diffusion of the aerosol particles in all directions, effectively increasing the dispersion range of the aerosol particles in the flight state. The aerosol particle feeding system 3 for inputting aerosol particles includes a material cylinder 15, a rotating main shaft 16 with grooves, a motor 17, and a blowing capillary 18. The particle injection amount is adjusted by adjusting the motor speed. The rotating main shaft 16 with grooves is located directly below the material cylinder 15 and is connected to the motor 17. The end of the blowing capillary 18 is above the rotating main shaft, blowing out the aerosol particles adhering to the grooves of the rotating main shaft 16, and at the same time, the air pressure can be adjusted to prevent blockage. The aerosol delivery pipeline 4, the aerosol delivery pipeline shielding cover 5, and the aerosol injection nozzle 6 are evenly distributed on the side surface of the axisymmetric exhaust nozzle. The aerosol injection nozzle 6 and the aerosol delivery pipeline shielding cover 5 are connected by a spherical connection so that the aerosol injection nozzle can rotate freely, and the aerosol injection nozzle 6 is located below the outer vane structure device 8. In order to facilitate the smooth ejection of aerosol particles, the aerosol injection nozzle 6 is a tapered nozzle, including a hemispherical tapered section and an equal-diameter section.

[0033] The usage steps of the aerosol injection device are as follows:

[0034] (1) The actual flight Mach number is processed into an electrical signal through the aerosol powder feeding amount control system, and the motor speed is adjusted through a frequency converter. Since the motor speed is proportional to the powder feeding amount of aerosol particles, the powder feeding amount is adjusted. When Ma ≤ 1, the motor maintains the basic speed n0; when Ma > 1, the motor speed n = n0[ln(Ma - 1) + 1], and the motor speed increases logarithmically with the increase of the flight Mach number; and as the powder feeding amount of aerosol particles increases, the aerosol powder feeding amount control system simultaneously regulates the valve of the secondary flow gas delivery pipeline to increase the transportation air flow speed to prevent aerosol particles from depositing in the delivery pipeline and causing pipeline blockage;

[0035] (2) Regulate the spatial distribution state of aerosol particles according to the actual flight conditions. Control the aerosol particle injection amount around the axisymmetric exhaust nozzle and adjust the tilt angle of the outer adjustable vane structure device and the aerosol injection nozzle angle through the aerosol delivery valve. If the flight Mach number is small, control the aerosol delivery valve to reduce the aerosol injection amount. If the flight Mach number is large, control the aerosol delivery valve to increase the aerosol injection amount, and adjust the aerosol injection nozzle angle by adjusting the tilt angle of the outer adjustable vane structure device and the aerosol nozzle angle adjustment device, select a suitable angle, and regulate an aerosol shielding layer with a large shielding range, high aerosol particle concentration, and low aerosol particle temperature around the hot jet.

[0036] A method for spraying aerosol particles in a supersonic flight state, comprising the following steps:

[0037] (1) Install an aerosol particle spraying device around the expansion section of the aeroengine tail nozzle. By spraying aerosol particles, they are suspended and wrapped around the hot jet under the action of turbulent flow and air buoyancy to form an aerosol shielding layer, which absorbs, scatters, and shields the infrared radiation of the hot jet and the hot cavity, thereby achieving infrared stealth.

[0038] (2) The outer adjustable vane structure device above the aerosol nozzle in flight can form a low-pressure area. Under the action of the pressure difference force, it forces the aerosol particles to diffuse outward towards the outer adjustable vane, while reducing the movement speed of the aerosol particles, and accelerating the diffusion of the aerosol particles around, effectively increasing the dispersion range of the aerosol particles in flight.

[0039] (3) Freely regulate the spatial distribution of aerosol particles according to the actual needs of different flight conditions. Control the aerosol injection amount of 16 aerosol nozzles evenly distributed around the axisymmetric nozzle through the aerosol delivery valve, adjust the tilt angle of the outer adjustable vane structure device, and regulate the injection angle of the aerosol nozzle by adjusting the aerosol nozzle angle adjustment device. If the flight Mach number is small, reduce the aerosol particle injection amount through the aerosol delivery valve. If the flight Mach number is large, increase the aerosol particle injection amount through the aerosol delivery valve, and adjust the tilt angle of the outer adjustable vane structure device and the injection angle of the aerosol injection nozzle, select a suitable angle, and regulate an aerosol shielding layer with a large shielding range and low aerosol particle temperature around the aeroengine tail nozzle and the hot jet, so that the aerosol particles do not generate a large amount of additional self-infrared radiation.

[0040] (4) According to different flight Mach numbers, the aerosol powder feeding amount control system makes the aerosol particle powder feeding amount increase with the increase of the flight Mach number; the aerosol powder feeding amount control system can process the actual flight Mach number into an electrical signal and adjust the motor speed through a frequency converter. Since the motor speed is proportional to the powder feeding amount of aerosol particles, the powder feeding amount is thus adjusted. When Ma ≤ 1, the motor maintains the basic speed n0; when Ma > 1, the motor speed n = n0[ln(Ma - 1)+]1, and the motor speed increases logarithmically with the increase of the flight Mach number; and as the aerosol particle powder feeding amount increases, the aerosol powder feeding amount control system simultaneously regulates the valve of the secondary flow gas conveying pipeline to increase the conveying air flow speed and prevent the aerosol particles from depositing in the conveying pipeline and causing pipeline blockage.

Claims

1. An apparatus for spraying aerosol in a supersonic flight state, comprising a secondary flow gas delivery pipeline (2), an aerosol particle feeding system (3), an aerosol delivery pipeline (4), an aerosol delivery pipeline shielding cover (5), an aerosol injection nozzle (6), an external adjusting vane structure device (8), and an exhaust nozzle (13); the aerosol particle feeding system (3) includes a hopper (15), a rotating main shaft (16), and a motor (17), characterized in that, It further includes an aerosol powder feeding amount control system (19); a first valve is provided on the secondary flow gas delivery pipeline (2); the aerosol powder feeding amount control system (19) includes a collection unit for collecting the flight Mach number, a control unit for converting the collected flight Mach number into an electrical signal, and regulating the rotational speed of the motor (17) and controlling the first valve through a frequency converter.

2. The device for spraying aerosol in a supersonic flight state according to claim 1, wherein The aerosol particle feeding system (3) further includes a blowing thin tube (18), the front end of the blowing thin tube (18) is communicated with the secondary flow gas delivery pipeline (2), and the end is located above the rotating main shaft (16) for blowing out the aerosol particles adhering to the groove of the rotating main shaft (16).

3. The aerosol spraying device in a supersonic flight state according to claim 2, characterized in that, A second valve is provided on the connecting pipeline between the blowing thin tube (18) and the secondary flow gas delivery pipeline (2), which is regulated by the aerosol powder feeding amount control system (19). As the rotational speed of the motor (17) increases, the opening degree of the second valve is increased through the control unit, so that the air intake flow rate in the blowing thin tube (18) increases.

4. The device for spraying aerosol in a supersonic flight state according to claim 1, characterized in that, The aerosol injection nozzle (6) is a reducing nozzle composed of a hemispherical tapered section and an equal-diameter section. The hemispherical tapered section is installed on the spherical connection structure (7) and is connected to the aerosol delivery pipeline shielding cover (5) through the spherical connection structure (7) to achieve free rotation.

5. The device for spraying aerosol in a supersonic flight state according to claim 1, wherein, An aerosol nozzle angle adjustment device (12) for regulating the injection angle of the aerosol injection nozzle (6) is installed on the outer adjustment piece structure device (8). One end of the aerosol nozzle angle adjustment device (12) is connected to the aerosol injection nozzle (6), and the other end is connected to the outer adjustment piece structure device (8), and it can rotate around both ends.

6. The device for spraying aerosol in a supersonic flight state according to any one of claims 1-5, characterized in that, The exhaust nozzle (13) is an axisymmetric structure.

7. The device for spraying aerosol in a supersonic flight state according to claim 6, characterized in that, The aerosol injection nozzles (6) are evenly distributed on the side of the exhaust nozzle (13) near the nozzle outlet, with a total of sixteen, and are connected to the end of the aerosol delivery pipeline (4); the aerosol delivery pipeline shielding cover (5) includes two identical front and rear parts. The inner circle is circular and sleeved on the side of the exhaust nozzle (13), and the outer circle is hexadecagonal to form a closed space with the aerosol delivery pipeline (4).

8. A method for spraying aerosol in a supersonic flight state, characterized in that, It includes the following steps: (1) The actual flight Mach number is processed into an electrical signal through the aerosol powder feeding amount control system, and the rotational speed of the motor is regulated through a frequency converter. Since the rotational speed of the motor is proportional to the powder feeding amount of the aerosol particles, the powder feeding amount is regulated; when Ma ≤ 1, the motor maintains the basic rotational speed n0; when Ma > 1, the rotational speed of the motor n = n0[ln(Ma - 1) + 1], and the rotational speed of the motor increases logarithmically with the increase of the flight Mach number; and as the powder feeding amount of the aerosol particles increases, the aerosol powder feeding amount control system simultaneously regulates the valve on the secondary flow gas delivery pipeline to increase the transport air flow speed to prevent the aerosol particles from depositing in the delivery pipeline and causing pipeline blockage; (2) Regulate the spatial distribution state of aerosol particles according to the actual flight conditions. Control the aerosol particle injection amount around the axisymmetric exhaust nozzle and adjust the tilt angle of the outer adjusting vane structure device and the aerosol injection nozzle angle through the aerosol delivery valve. When the flight Mach number is less than 1, control the aerosol delivery valve to reduce the aerosol injection amount. When the flight Mach number is greater than 1, control the aerosol delivery valve to increase the aerosol injection amount, and adjust the aerosol injection nozzle angle by adjusting the tilt angle of the outer adjusting vane structure device and the aerosol nozzle angle adjusting device to control an aerosol shield with a large shielding range and low aerosol particle temperature around the hot jet flow.

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