CN111751486B - Diagnosis method and device for ignition combustion process and details of metal particles along with flow - Google Patents
Diagnosis method and device for ignition combustion process and details of metal particles along with flow Download PDFInfo
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- CN111751486B CN111751486B CN202010598683.0A CN202010598683A CN111751486B CN 111751486 B CN111751486 B CN 111751486B CN 202010598683 A CN202010598683 A CN 202010598683A CN 111751486 B CN111751486 B CN 111751486B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N2021/8411—Application to online plant, process monitoring
Abstract
The invention discloses a method and a device for diagnosing the ignition combustion process and details of metal particles along with flow, which comprise a solid fuel gas generator, a fuel gas channel and a windowing observation section which are sequentially communicated in the axial direction, wherein the fuel gas channel is a cavity surrounded by a shell, a plurality of longitudinal powder ejectors are arranged on the lower shell of the fuel gas channel, positioned outside the fuel gas channel and spaced along the length direction of the fuel gas channel, and the plurality of powder ejectors do not work at the same time and are all used for ejecting metal powder into the fuel gas channel. The device can effectively inhibit condensed phase deposition of the observation window, and capture and diagnosis of flame structure and combustion details of the whole process of ignition, combustion and flameout of metal particles along with the flow can be realized.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of metal particle combustion, and particularly relates to a diagnosis method and a diagnosis device for ignition combustion process and details of metal particles along with flow.
[ background of the invention ]
The metal particles have high volume energy density and excellent ignition and combustion performance, are ideal energy additives and are widely applied to the aerospace propulsion fields of solid rocket engines, powder rocket engines and the like. In a combustion chamber of a rocket engine, the flow velocity of gas and particles is often high (10-60 m/s), the particle size of the particles is small (1-200 mu m), the ignition combustion process of metal particles is often a process of mutual coupling of flow, chemical reaction and heat and mass transfer, and gas phase and surface reaction exist, so that the complexity is high. Compared with static conditions, the heat and mass transfer between particles and gas is substantially different, and the ignition combustion process of metal particles is greatly influenced. Therefore, it is necessary to acquire detailed information of the metal particle ignition combustion process, the flame structure, the temperature and the like under the condition of flow, and provide theoretical basis and guidance for rocket engine combustion chamber performance prediction and rocket engine design.
In the current research process of the combustion characteristics of metal particles, the environment is mostly in a static or simple flowing condition, and the method is greatly different from the actual combustion conditions of the current solid rocket engine and powder rocket engine. In order to acquire the ignition combustion process and details of the metal particles, a high-resolution image of the metal particles needs to be captured, and a common capturing method mainly comprises the following steps: direct photography, schlieren, shadow, laser holography, and the like. The schlieren method, the shadow method and the laser holography method need to build a relatively complex light path, and the light source, particularly laser, can strongly influence the shooting of particle flame, so the direct shooting method is still the main particle combustion diagnosis method.
[ summary of the invention ]
The invention aims to provide a method and a device for diagnosing the ignition combustion process and details of metal particles along with flow, which can effectively inhibit condensed phase deposition of an observation window and realize the capture and diagnosis of the flame structure and the combustion details of the whole process of ignition, combustion and flameout of the metal particles along with the flow.
The invention adopts the following technical scheme: a diagnosis device for the ignition combustion process and details of metal particles along with flow comprises a solid gas generator, a gas channel and a windowing observation section which are sequentially communicated in the axial direction, wherein the gas channel is a cavity surrounded by a shell, a plurality of longitudinal powder ejectors are arranged on a lower shell of the gas channel, positioned outside the gas channel and arranged at intervals along the length direction of the gas channel, and the plurality of powder ejectors do not work simultaneously and are all used for ejecting metal powder into the gas channel.
The windowing observation section is a cavity defined by a shell, and glass observation windows are arranged on the front side and the rear side of the shell.
The solid fuel gas generator is a hollow shell with a closed end, one side of the shell of the solid fuel gas generator is longitudinally provided with an oxygen supplementing channel for external combustion-supporting gas to enter, and the combustion-supporting gas entering the fuel gas channel is increased in the process of metal powder combustion.
A high-speed camera is arranged on the side of the glass observation window of the windowing observation section, and is positioned at a position as high as the windowing observation section; the high-speed camera is connected with the acquisition and control computer, and the acquisition and control computer is used for receiving the picture information of the high-speed camera.
Furthermore, a sheet heater is arranged on the shell of the windowing observation section, and the sheet heater is connected with a temperature control heating device.
Further, the powder ejector includes:
the powder filling device is positioned in the gas channel and is a hollow shell, the hollow shell is used for filling metal powder, the upper part of the shell is provided with a plurality of powder outflow holes, and the middle lower part of the shell and one side opposite to the inflow direction are provided with a plurality of airflow inlet holes;
and the piston device is connected to the lower part of the powder filler and is used for driving the powder filler to move up and down in the gas channel.
Furthermore, an annular boss is coaxially arranged at the closed end in the shell of the gas generator, an inner-outer hole solid propellant with the same diameter is arranged in the boss, a vertical annular medicine baffle plate is arranged at the middle part in the shell and attached to the right end of the inner-outer hole solid propellant, the central opening of the medicine baffle plate is in a horn shape expanding outwards from left to right, and an annular groove is formed in the center of the left wall surface of the medicine baffle plate and used for clamping the right end of the inner-outer hole solid propellant; a plurality of combustion-supporting gas through holes are axially formed in the upper part and the lower part of the medicine baffle plate;
a vertical rectifying plate is arranged in the fuel gas generator close to the right end, the side surface of the rectifying plate is tightly attached to the inner side wall of the fuel gas generator, and a plurality of axial fuel gas through holes are distributed in the rectifying plate and used for gas after propellant combustion to pass through;
a vertical spoiler is arranged on the left of the rectifying plate and right of the inner and outer hole solid propellant;
an ignition resistance wire is respectively arranged on the inner hole and the outer hole of the solid propellant with the inner hole and the outer hole, and the two ignition resistance wires are connected with a control computer to realize simultaneous ignition of the inner hole and the outer hole
Furthermore, the outer wall surfaces of the left end and the right end of the solid propellant with the inner hole and the outer hole are tightly attached with a heat insulation layer.
Further, the piston device comprises a cylinder, the cylinder comprises an upper cavity and a lower cavity, the two cavities are communicated through a through hole formed in the center, openings are formed in the centers of the upper end and the lower end of the cylinder, a piston rod is vertically arranged in the cavity of the cylinder in a through mode, the upper end and the lower end of the piston rod penetrate through the openings in the upper end and the lower end of the cylinder, and the upper end of the piston rod is connected with the powder loader; a piston is sleeved on the piston rod and positioned in the cavity below the piston rod;
and a first gas inlet and outlet hole is formed in the lower end of the upper cavity and around the periphery of the upper cavity, a second gas inlet and outlet hole is formed in the lower end of the lower cavity, and the first gas inlet and outlet hole and the second gas inlet and outlet hole are used for gas to enter or discharge so as to press the piston to move towards or away from the upper end.
The invention also discloses a diagnosis method of the combustion process and details of the metal particle ignition along with the flow, the diagnosis device of the combustion process and details of the metal particle ignition along with the flow is used, the solid gas generator is started, and the high-temperature multi-component gas flow is generated; the combustion-supporting gas enters the solid fuel gas generator through the oxygen supplementing channel, is mixed with the fuel gas flow to generate mixed gas flow, and enters the fuel gas channel; and starting the temperature control heating device.
Starting the powder ejectors in sequence by taking the observation section close to the window as a starting point, wherein the powder ejectors sequentially extend into the central axis of the gas channel; during the flowing process of part of mixed airflow in the gas channel, the mixed airflow enters the powder filling device through the airflow inlet holes in sequence to drive the powder to enter the gas channel through the powder outflow hole and to be mixed and combusted with the mixed airflow in the gas channel; in the combustion process, the combustion-supporting gas is supplemented into the gas channel through the oxygen supplementing channel, and is mixed with the mixed gas flow to be fully combusted to generate gas particles; the gas particles flow through the windowing observation section and are shot by the high-speed camera, and the image information of the particles along with the flow is obtained.
The invention has the beneficial effects that: the device can effectively inhibit condensed phase deposition of an observation window, realize capture and diagnosis of flame structure and combustion details of metal particles in the whole processes of ignition, combustion and flameout along with flow, can analyze and obtain the temperature distribution of an aluminum particle oxidation cap, an aluminum core and flame, and has great promotion effect on the research of the combustion mechanism of the metal particles.
[ description of the drawings ]
FIG. 1 is a schematic diagram of a diagnostic device for igniting the combustion process and details of a metal particle stream;
FIG. 2 is a schematic structural view of a windowed observation section provided with a sheet heater;
FIG. 3 is a schematic diagram of a solid gas generator;
FIG. 4 is a schematic structural view of the powder ejector;
FIG. 5 is a photograph of the effect of condensed phase deposition on the observation window;
FIG. 6 is a graph showing the effect of the combined oxygen supply and electric heating embodiment;
FIG. 7 is a graph of aluminum particles and their flame profiles at various stages;
FIG. 8 is a graph of aluminum particle flame temperature in a flow-by-flow combustion regime.
Wherein: 1. a solid gas generator; 2. a gas channel; 3. windowing an observation section; 4. an optical filter; 5. a high-speed camera; 6. a collection and control computer; 7. a temperature-controlled heating device; 8. a glass protection gas circuit; 9. a powder ejector; 10. an oxygen supplement channel; 11. a plate heater; 12. an ignition resistance wire;
1-1, a medicine baffle plate; 1-2, solid propellant with inner and outer holes; 1-3, heat insulating layer; 1-4. a spoiler; 1-5, a rectifying plate;
[ detailed description ] embodiments
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, a diagnosis device for the ignition combustion process and details of metal particles along with flow comprises a solid gas generator 1, a gas channel 2 and a windowing observation section 3 which are sequentially communicated in the axial direction, wherein the gas channel 2 is a cavity surrounded by a shell, a plurality of longitudinal powder ejectors 9 are arranged on the lower shell of the gas channel 2, are positioned outside the gas channel and are arranged along the length direction at intervals, and the plurality of powder ejectors 9 do not work at the same time and are used for ejecting metal powder into the gas channel 2. The particles injected by the powder ejectors 9 at different positions are in different ignition and combustion stages when reaching the observation window, and the information such as the flow state, the flame structure and the like of the particles at different ignition and combustion stages is acquired by the high-speed camera 5, so that the complete ignition and combustion details of the metal particles under the condition of flowing along with the diagnosis and analysis are obtained.
The windowing observation section 3 is a cavity defined by a shell, and glass observation windows are arranged on the front side and the rear side of the shell. The solid gas generator 1 is a hollow shell with a closed end, an oxygen supplementing channel 10 is longitudinally arranged on one side of the shell of the gas generator 1 and used for allowing external combustion-supporting gas to enter the solid gas generator and increasing the combustion-supporting gas entering the gas channel 2 in the process of metal powder combustion.
A high-speed camera 5 is arranged on the glass observation window side of the windowing observation section 3, and the high-speed camera 5 is positioned at the same height as the windowing observation section 3; the high-speed camera 5 is connected with the acquisition and control computer 6, and the acquisition and control computer 6 is used for receiving the picture information of the high-speed camera 5. The neutral optical filter 4 is arranged in front of the lens of the high-speed camera 5 and is a UV (ultraviolet) mirror, so that the light intensity of the full wave band can be reduced, the over-exposure phenomenon in the shooting process is avoided, and the interference of gas flame can be effectively filtered by setting the proper parameters of the high-speed camera in a matching way, thereby being beneficial to shooting the flowing combustion details of metal particles.
A sheet heater 11 is arranged on the shell of the windowing observation section 3, and the sheet heater 11 is connected with the temperature control heating device 7. For suppressing the deposition of liquid water and soot on the surface of the glass window caused by the combustion of the solid gas generator 1, so that a sufficiently good photographic result is obtained.
As shown in fig. 4, the powder ejector 9 includes: the powder filling device 9-1 is positioned in the gas channel 2 and is a hollow shell, the hollow shell is used for filling metal powder, the upper part of the shell is provided with a plurality of powder outflow holes, and the middle lower part of the shell and the side opposite to the inflow direction are provided with a plurality of airflow inlet holes 9-2. And the piston device is connected to the lower part of the powder filler 9-1 and is used for driving the powder filler 9-1 to move up and down in the gas channel 2.
As shown in fig. 3, an annular boss is coaxially arranged at the closed end in the shell of the gas generator 1, an inner-outer hole solid propellant 1-2 with the same diameter is arranged in the boss, a vertical annular medicine baffle plate 1-1 is arranged at the middle part in the shell and attached to the right end of the inner-outer hole solid propellant 1-2, the central opening of the medicine baffle plate 1-1 is in a horn shape extending outwards from left to right, and an annular groove is arranged at the center of the left wall surface of the medicine baffle plate 1-1 and used for clamping the right end of the inner-outer hole solid propellant 1-2; a plurality of combustion-supporting gas through holes are axially formed in the upper part and the lower part of the medicine baffle plate 1-1. The propellant with the HTPB/AP formula causes liquid water and soot deposition easily when gas contacts a cold glass window, and the shooting is affected. As shown at 5a and 5b in fig. 5.
A vertical rectifying plate 1-5 is arranged in the gas generator 1 close to the right end, the side surface of the rectifying plate 1-5 is tightly attached to the inner side wall of the gas generator 1, and a plurality of axial gas through holes are distributed on the rectifying plate 1-5 and used for gas passing after propellant combustion.
A vertical spoiler 1-4 is arranged at the left of the rectifying plate 1-5 and right of the inner and outer hole solid propellant 1-2;
and the ignition resistance wires 1-6 are respectively arranged on the inner hole and the outer hole of the solid propellant 1-2 with the inner hole and the outer hole, and the two ignition resistance wires 1-6 are connected with a control computer to realize the simultaneous ignition of the inner hole and the outer hole.
And the outer wall surfaces of the left end and the right end of the solid propellant 1-2 with the inner hole and the outer hole are tightly attached with a heat insulation layer 1-3.
The piston device comprises a cylinder 9-5, the cylinder 9-5 comprises an upper cavity and a lower cavity, the two cavities are communicated through a through hole arranged in the center, openings are formed in the centers of the upper end and the lower end of the cylinder 9-5, a piston rod 9-6 is vertically arranged in the cavity of the cylinder 9-5 in a through mode, the upper end and the lower end of the piston rod 9-6 penetrate through the openings in the upper end and the lower end of the cylinder 9-5, and the upper end of the piston rod 9-6 is connected with a powder loader 9-1; a piston is sleeved on the piston rod 9-6 and is positioned in the cavity below the piston;
the lower end of the upper cavity is provided with a first gas inlet and outlet hole 9-3 around the periphery of the upper cavity, the lower end of the lower cavity is provided with a second gas inlet and outlet hole 9-4, and the first gas inlet and outlet hole 9-3 and the second gas inlet and outlet hole 9-4 are both used for the inlet or the outlet of gas so as to press the piston to move towards or away from the upper end.
The invention also discloses a diagnosis method of the combustion process and details of the ignition along with the flow of the metal particles, which uses the diagnosis device of the combustion process and details of the ignition along with the flow of the metal particles and is characterized in that,
starting the solid gas generator 1 to generate a high-temperature, multi-component gas stream; the combustion-supporting gas enters the solid fuel gas generator 1 through the oxygen supplementing channel 10, is mixed with the fuel gas flow to generate mixed gas flow, and enters the fuel gas channel 2; starting the temperature control heating device 7;
starting the powder ejectors 9 in sequence by taking the observation section 3 close to the window as a starting point, wherein the powder fillers 9-1 extend into the central axis of the gas channel 2 in sequence; in the flowing process of part of mixed airflow in the gas channel 2, the mixed airflow enters the powder filling device 9-1 through each airflow inlet hole 9-2 in sequence to drive the powder to enter the gas channel 2 through the powder outlet hole and be mixed and combusted with the mixed airflow in the gas channel 2; in the combustion process, the combustion-supporting gas is supplemented into the gas channel 2 through the oxygen supplementing channel 10, and is mixed with the mixed gas flow to be fully combusted to generate gas particles; the gas particles flow through the windowing observation section 3 and are shot by the high-speed camera 5, and image information of the particles along with the flow is obtained.
In order to simulate a real solid rocket engine or a powder rocket engineEnvironmental parameters, temperature, speed and components of the engine adopt the propellant with HTPB/AP formula, and when the temperature control heating device 7 and oxygen supplement are not started, a thick layer of 200-1000 μm is deposited on the inner surface of the observation window glass after the propellant is combusted, so that the observation of Al particles is greatly influenced. The main components of the window deposition are nano-scale amorphous carbon and H2O, and the like. As shown in fig. 5.
By adopting the device disclosed by the invention and adopting a propellant with an HTPB/AP formula, the distances from each powder ejector 9 to the center of a shooting visual field are 120mm, 300mm, 480mm and 680mm in sequence, and the time periods in which the particles stay in the fuel gas when the high-speed camera 5 shoots are 8.3 ms-11.7 ms, 23.3 ms-26.7 ms, 38.3 ms-41.6 ms and 55 ms-58.3 ms respectively, so that the metal particles are in different ignition combustion states.
The main condensed phase in the gas system generated by the combustion of the AP/HTPB propellant is carbon particles, and mainly comes from the combustion of HTPB. The carbon generation process is mainly related to CO in a fuel gas system2And CO is relevant. Gmelins Handbuch[10]It is pointed out that in a gas environment with a temperature below 1000K, CO is largely decomposed into C and CO2. As can be seen from the formulas (2) and (3), the equilibrium of the reaction (1) can be promoted to move to the left by appropriately supplementing oxygen, and CO can be promoted2The concentration is increased and the CO concentration is decreased, thereby shifting the equilibrium of the reaction (2) to the left and inhibiting carbon deposition.
The temperature control heating device 7 is started, the temperature of the glass window is heated to be higher than 120 ℃, condensation of water vapor on the inner wall surface of the glass can be avoided, and in addition, generation of C smoke particles at the position close to the wall surface of the flow field can be restrained to a certain extent. By the combined scheme of oxygen supplement and electric heating, the window temperature is heated to 200 ℃, and N with 60 percent of oxygen concentration is supplemented2/O2The mixed gas of 2g/s can effectively inhibit the condensed phase deposition of the glass window, and the implementation effect is shown in fig. 6 (a) and 6 (b).
The shapes of the aluminum particles and the flame thereof at different stages obtained after photographing are shown in fig. 7, dark gray or white points are the aluminum particles, the brightness gradually increases along with the continuous process, and the bright points gradually increase. The dark gray color of the particles indicates that the particles are still in a pre-heated state, the particles begin to brighten indicating that the particles are in an ignited state, the brightness of the particles is at a maximum and a tailing occurs indicating that the ignition of the aluminum particles has been completed and the ignition and burning rate of the aluminum particles has entered the burn stage.
The particle flame temperature distribution obtained by the pseudo-color thermometry method is shown in fig. 8. Is the microscopic flame structure of aluminum particles under flowing conditions, p is the oxidation cap for aluminum particle combustion, q is the liquid core of the aluminum particles, and R is the gas phase combustion flame. Analyzing to obtain flame temperature information, oxidizing cap K, liquid core K and gas-phase flame. This shows that the method has obvious detail feature diagnosis capability and obtains excellent particle flame detail diagnosis effect.
Claims (4)
1. A method for diagnosing a process and details of metal particle ignition with stream, using a device for diagnosing a process and details of metal particle ignition with stream, the device comprising:
the device comprises a solid gas generator (1), a gas channel (2) and a windowing observation section (3) which are sequentially communicated in the axial direction, wherein the gas channel (2) is a cavity surrounded by a shell, a plurality of longitudinal powder ejectors (9) are arranged on the lower shell of the gas channel (2), positioned outside the lower shell and spaced along the length direction of the lower shell, and the plurality of powder ejectors (9) do not work at the same time and are all used for injecting metal powder into the gas channel (2);
the windowing observation section (3) is a cavity defined by a shell, and glass observation windows are arranged on the front and back opposite sides of the shell;
the solid fuel gas generator (1) is a hollow shell with a closed end, an oxygen supplementing channel (10) is longitudinally formed in one side of the shell of the solid fuel gas generator (1) and used for allowing external combustion-supporting gas to enter the solid fuel gas generator, and the combustion-supporting gas entering the fuel gas channel (2) is increased in the process of burning metal powder;
a high-speed camera (5) is arranged on the glass observation window side of the windowing observation section (3), and the high-speed camera (5) is located at the same height position as the windowing observation section (3); the high-speed camera (5) is connected with a collection and control computer (6), and the collection and control computer (6) is used for receiving picture information of the high-speed camera (5);
the powder ejector (9) comprises:
the powder filling device (9-1) is positioned in the gas channel (2), is a hollow shell, is used for filling metal powder in the hollow shell, and is provided with a plurality of powder outflow holes at the upper part of the shell, and is provided with a plurality of airflow inlet holes (9-2) at the middle lower part of the shell and at one side opposite to the inflow direction;
the piston device is connected to the lower part of the powder filler (9-1) and is used for driving the powder filler (9-1) to move up and down in the gas channel (2);
a sheet heater (11) is arranged on the shell of the windowing observation section (3), and the sheet heater (11) is connected with a temperature control heating device (7);
the diagnosis method comprises the following steps:
the solid gas generator (1) is started to generate a high-temperature multi-component gas flow; the combustion-supporting gas enters the solid fuel gas generator (1) through the oxygen supplementing channel (10), is mixed with the fuel gas flow to generate mixed gas flow, and enters the fuel gas channel (2); starting the temperature-controlled heating device (7);
starting the powder ejectors (9) in sequence by taking the observation section (3) close to the window as a starting point, wherein the powder fillers (9-1) sequentially extend into the central axis of the gas channel (2); in the flowing process of partial mixed airflow in the gas channel (2), the partial mixed airflow enters the powder filling device (9-1) through the airflow inlet holes (9-2) in sequence to drive powder to enter the gas channel (2) through the powder outlet hole, and the powder and the mixed airflow in the gas channel (2) are mixed and combusted; in the combustion process, the combustion-supporting gas is supplemented into the gas channel (2) through the oxygen supplementing channel (10) and is mixed with the mixed gas flow, and the gas is fully combusted to generate gas particles; the gas particles flow through the windowing observation section (3), and are shot by the high-speed camera (5), so that the image information of the particles along with the flow is obtained.
2. The diagnosis method for the ignition combustion process and details of the metal particles along with the flow as claimed in claim 1, characterized in that an annular boss is coaxially arranged at the closed end in the shell of the gas generator (1), an inner and outer hole solid propellant (1-2) with the same diameter is arranged in the boss, a vertical annular medicine baffle plate (1-1) is arranged in the middle of the shell and at the right end attached to the inner and outer hole solid propellant (1-2), the central opening of the medicine baffle plate (1-1) is in a horn shape extending from left to right, an annular groove is arranged at the center of the left wall surface of the medicine baffle plate (1-1) and used for clamping the right end of the inner and outer hole solid propellant (1-2); a plurality of combustion-supporting gas through holes are axially formed in the upper and lower parts of the medicine baffle plate (1-1);
a vertical rectifying plate (1-5) is arranged at the right end in the gas generator (1), the side surface of the rectifying plate (1-5) is tightly attached to the inner side wall of the gas generator (1), and a plurality of axial gas through holes are distributed on the rectifying plate (1-5) and used for gas passing after propellant is combusted;
a vertical spoiler (1-4) is arranged on the left of the rectifying plate (1-5) and right of the inner and outer hole solid propellant (1-2);
and the ignition resistance wires (1-6) are respectively arranged on the inner hole and the outer hole of the inner-hole and outer-hole solid propellant (1-2), and the two ignition resistance wires (1-6) are connected with a control computer to realize the simultaneous ignition of the inner hole and the outer hole.
3. The method for diagnosing the ignition combustion process and details of metal particles along with flow as claimed in claim 2, wherein a thermal insulation layer (1-3) is closely attached to the outer wall surface of each of the left and right ends of the inner and outer pore solid propellants (1-2).
4. The diagnosis method for the ignition combustion process and details of the metal particles along with the flow according to claim 3, characterized in that the piston device comprises a cylinder (9-5), the cylinder (9-5) comprises an upper cavity and a lower cavity, the two cavities are communicated through a through hole arranged in the center, the centers of the upper end and the lower end of the cylinder (9-5) are respectively provided with an opening, a piston rod (9-6) is vertically arranged in the cavity of the cylinder (9-5) in a through manner, the upper end and the lower end of the piston rod (9-6) pass through the openings of the upper end and the lower end of the cylinder (9-5), and the upper end of the piston rod (9-6) is connected with a powder loader (9-1); a piston is sleeved on the piston rod (9-6) and is positioned in a cavity below the piston;
and a first gas inlet and outlet hole (9-3) is formed in the lower end of the upper cavity and around the periphery of the upper cavity, a second gas inlet and outlet hole (9-4) is formed in the lower end of the lower cavity, and the first gas inlet and outlet hole (9-3) and the second gas inlet and outlet hole (9-4) are used for the inlet or the outlet of gas so as to press the piston to move towards or away from the upper end.
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