CN112763220A

CN112763220A - Small-flow incoming flow parameter simulation air inlet system and test bed

Info

Publication number: CN112763220A
Application number: CN202110000206.4A
Authority: CN
Inventors: 周培好; 周皓; 王文彬
Original assignee: Beijing Aerospace Sanfa High Tech Co Ltd
Current assignee: Beijing Aerospace Sanfa High Tech Co Ltd
Priority date: 2021-01-02
Filing date: 2021-01-02
Publication date: 2021-05-07

Abstract

A small-flow inflow parameter simulation system is characterized in that a cooling water system is respectively communicated with a stable measurement section, an air inlet spray pipe, a hot air switching and bypass device cooling device and a tail chamber, and cooling water is provided for cooling the components; the liquid fuel supply system and the gas fuel supply system supply fuel for the main air inlet path fuel heating device; the oxygen supplementing system provides liquid oxygen for the main air inlet path oxygen supplementing blender, and is used for burning fuel in the main air inlet path fuel heating device; the particle loading system loads particles for a test; the process gas system is communicated with an operation gas source of a pneumatic valve of the system. The small-flow inflow parameter simulation system can effectively realize accurate simulation of small-flow inflow parameters, can accurately and effectively control the mass flow of particles, becomes an effective closed-loop control system, and can effectively observe the test state.

Description

Small-flow incoming flow parameter simulation air inlet system and test bed

Technical Field

The invention relates to the technical field of test bed tests, in particular to a small-flow inflow parameter simulation air inlet system and a test bed.

Background

A small-flow incoming flow parameter simulation air inlet system is an important component of a small-flow incoming flow parameter simulation test bed, however, in the prior art, an effective small-flow incoming flow parameter accurate simulation test bed for realizing small-flow incoming flow parameter accurate simulation is not available, meanwhile, a particle loading device is not available for accurately and effectively controlling the mass flow of particles, an effective closed-loop control system cannot be formed, in addition, effective observation cannot be carried out on a test state, therefore, aiming at small-flow incoming flow parameter accurate simulation, the mass flow of particles can be accurately and effectively controlled, and an effective closed-loop control system particle loading device and a small-flow incoming flow parameter simulation test bed are formed.

The cooling water system is an important matching system of the engine test bed, and provides cooling water with corresponding parameter requirements according to the requirements of the test bed. For a test bed, a plurality of engine tests of different models are required, and the test bed usually comprises small-flow equipment water and large-flow hydraulic dynamometer water, which have different requirements on cooling water parameters. For example: when the cooling water is provided for the hydraulic dynamometer, the water pressure of the cooling water is required to have no large fluctuation, the liquid levels of the cold water pool and the hot water pool are required to be maintained in a design range when a cooling water system operates, and meanwhile, higher requirements are provided for the control of the cold water pump and the hot water pump. After the cooling water passes through the water utilization equipment and the hydraulic dynamometer, the water temperature rises, and before the cooling water is recycled, the cooling water needs to be subjected to cooling treatment, so that the cooling effect of the recycled cooling water due to overhigh water temperature is avoided. In addition, the prior art generally arranges the test bed and the cooling water pump room in different areas, which is inconvenient for centralized management and operation.

The process gas system is an important matching system of an engine test bed, and is an operation gas source configured for a control valve in an adjusting gas path of an air inlet total pressure simulation system, an injection system and other systems.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the small-flow inflow parameter simulation air inlet system and the test bed are provided.

The technical solution of the invention is as follows:

a small-flow inflow parameter simulation air inlet system comprises a main air inlet path, a cooling water system, a liquid fuel supply system, an oxygen supplement system and a gas fuel supply system; the cooling water system is connected with the main air inlet circuit in the main air inlet circuit for stable measurement, and is a main air inlet circuit stable measurement section, an air inlet spray pipe and a hot air switching and bypass device cooling device; the liquid fuel supply system and the gas fuel supply system are communicated with a main air inlet path fuel heating device in a main air inlet path to provide fuel for the main air inlet path fuel heating device; the oxygen supplementing system is communicated with a main air inlet circuit oxygen supplementing blender in the main air inlet circuit, provides liquid oxygen for the main air inlet circuit oxygen supplementing blender and is used for burning fuel in the main air inlet circuit fuel heating device;

further, along the gas flow direction of air supply to the main air inlet way export, the main air inlet way includes through the pipeline intercommunication, main air inlet way total stop valve, main air inlet way air intake flowmeter, main air inlet way pressure regulating valve, the first pneumatic ball valve of main air inlet way, main air inlet way oxygenating blender, main air inlet way fuel heating device, main air inlet way blender and main air inlet way stability measurement section.

Furthermore, the main air inlet circuit comprises a main air inlet circuit heating circuit, one end of the main air inlet circuit heating circuit is communicated with a pipeline communicated with the main air inlet circuit pressure regulating valve and the main air inlet circuit first pneumatic ball valve, the other end of the main air inlet circuit heating circuit is communicated with the main air inlet circuit blender, and the main air inlet circuit heating circuit comprises a main air inlet circuit second pneumatic ball valve and a main air inlet circuit electric heater which are sequentially communicated through pipelines along the gas flowing direction communicated from the pipeline communicated with the main air inlet circuit pressure regulating valve and the main air inlet circuit first pneumatic ball valve to the main air inlet circuit blender.

Further, the liquid fuel supply system and the oxygen supplement system comprise a common nitrogen source and a pressure reducing valve, and the liquid fuel supply system and the oxygen supplement system are arranged in parallel; the liquid fuel supply system comprises a liquid fuel supply system fuel supply circuit and a liquid fuel supply system blow-off circuit; along the flowing direction of liquid fuel from a nitrogen source to the main air inlet path fuel heating device, a fuel supply path of a liquid fuel supply system comprises a pressure reducing valve, a first electromagnetic valve of the liquid fuel supply system, a fuel tank, a filter of the liquid fuel supply system, a second electromagnetic valve of the liquid fuel supply system, a flowmeter of the liquid fuel supply system, a regulating valve of the liquid fuel supply system and a third electromagnetic valve of the liquid fuel supply system which are communicated through pipelines; one end of the liquid fuel supply system blow-off line is communicated with a pipeline communicated between the pressure reducing valve and the first electromagnetic valve of the liquid fuel supply system, the other end of the liquid fuel supply system blow-off line is communicated with a pipeline communicated between the second electromagnetic valve of the liquid fuel supply system and the flowmeter of the liquid fuel supply system, and a fourth electromagnetic valve of the liquid fuel supply system is arranged on the liquid fuel supply system blow-off line; the oxygenating system comprises an oxygenating system liquid oxygen supply path and an oxygenating system blowing path, and the oxygenating system liquid oxygen supply path comprises a pressure reducing valve, an oxygenating system first electromagnetic valve, a liquid oxygen storage tank, an oxygenating system second electromagnetic valve, an oxygenating system flow meter, an oxygenating system regulating valve and an oxygenating system third electromagnetic valve which are communicated through a pipeline along the flow direction of liquid oxygen from a nitrogen source to the main air inlet path oxygenating blender; one end of the oxygen supplementing system blowing way is communicated with a pipeline communicated between the pressure reducing valve and the first electromagnetic valve of the oxygen supplementing system, the other end of the oxygen supplementing system blowing way is communicated with a pipeline communicated between the second electromagnetic valve of the oxygen supplementing system and the flow meter of the oxygen supplementing system, and a fourth electromagnetic valve of the oxygen supplementing system is arranged on the oxygen supplementing system blowing way.

Further, along the gas fuel flowing direction from the gas cylinder to the main gas inlet path fuel heating device, the gas fuel supply system comprises a gas cylinder, a first electromagnetic valve of the gas fuel supply system, a pressure reducing valve of the gas fuel supply system, a regulating valve of the gas fuel supply system, a flow meter of the gas fuel supply system and a second electromagnetic valve of the gas fuel supply system which are sequentially communicated through pipelines.

A test bed comprises the small-flow inflow parameter simulation air inlet system, and is characterized by comprising a particle loading system, a hot air switching and bypass device, an exhaust device and a process gas system; the cooling water system is respectively an air inlet spray pipe and a hot air switching and bypass device cooling device in the particle loading system and a hot air switching and bypass device cooling device in the bypass device, and the air inlet spray pipe and the hot air switching and bypass device cooling device are used as the air inlet spray pipe and the hot air switching and bypass device cooling device; two ends of the particle loading system are respectively communicated with an outlet of the main air inlet path and an inlet of the exhaust device; two ends of the hot air switching and bypass device are respectively communicated with an outlet of the main air inlet path and the exhaust device; the process gas system is respectively communicated with the main gas inlet circuit, the liquid fuel supply system, the oxygen supplement system and the operation gas source of the pneumatic valve of the gas fuel supply system.

Further, the cooling water system comprises a cooling water input path, a water tank, a cooling water main supply path, an air inlet spray pipe cooling path, a main air inlet path stable measurement section cooling path and a hot air switching and bypass device cooling path; the water tank comprises a cooling water injection port, a cooling water outlet and a water return port, and comprises a water tank liquid level meter and a water temperature measuring point; a cooling water inlet along a tap water inlet to a cooling water injection port of the water tank, wherein the cooling water input path comprises a cooling water input path manual stop valve, a cooling water input path filter and a cooling water input path stabilizing section which are communicated through a pipeline; the cooling water main supply path comprises a cooling water main supply path stable section, a cooling water main supply path filter, a cooling water main supply path water pump and a cooling water main supply path pressure measuring point, wherein the cooling water main supply path is communicated with the cooling water main supply path stable section through a pipeline; the cooling path of the air inlet spray pipe comprises an air inlet spray pipe cooling water supply path and an air inlet spray pipe cooling path water return path, two ends of the air inlet spray pipe cooling water supply path are respectively communicated with an outlet of a cooling water main supply path and an inlet of a cooling pipeline of the air inlet spray pipe along the flow direction of cooling water, an air inlet spray pipe cooling path flowmeter and an air inlet spray pipe cooling path stabilizing section are sequentially arranged on the air inlet spray pipe cooling water supply path along the flow direction of the cooling water, two ends of the air inlet spray pipe cooling path water return path are respectively communicated with an outlet of the cooling pipeline of the air inlet spray pipe and a water return port of a water tank, and an air inlet spray pipe cooling path; the cooling circuit of the main air inlet path stability measurement section comprises a cooling water supply circuit of the main air inlet path stability measurement section and a cooling water return circuit of the main air inlet path stability measurement section, the two ends of the cooling water supply circuit of the main air inlet path stability measurement section are respectively communicated with the outlet of the cooling water main supply circuit and the inlet of the cooling circuit of the main air inlet path stability measurement section along the flow direction of cooling water, and a cooling circuit flowmeter of the main air inlet path stability measurement section and a cooling circuit stability section of the main air inlet path stability measurement section are sequentially arranged on the cooling water supply circuit of the main air inlet path stability measurement section along the flow direction of the cooling water; two ends of a cooling path water return path of the main air inlet path stability measurement section are respectively communicated with a cooling path outlet of the main air inlet path stability measurement section and a water return port of the water tank, and a cooling path water return path of the main air inlet path stability measurement section is provided with a temperature measuring point of the cooling path of the main air inlet path stability measurement section; along the flowing direction of cooling water, two ends of a hot air switching and bypass device cooling circuit are respectively communicated with an outlet of a cooling water main supply circuit and an inlet of a cooling water pipeline of a cooling device in the hot air switching and bypass device cooling circuit, and the hot air switching and bypass device cooling circuit is provided with a hot air switching and bypass device stabilizing section.

Further, the particle loading system comprises a hopper, particles, a glass guide pipe, a dust flow meter, a pressure reducing valve, an air discharge electromagnetic valve, a discharge valve and a particle loading device air source; the air source of the particle loading device is communicated with a pressure reducing valve, and the outlet of the pressure reducing valve is respectively communicated with the hopper and the air bleed solenoid valve through pipelines; the hopper comprises a hopper body, an upper cover of the hopper is arranged on the hopper body, a particle pressing plate is arranged in the hopper body, a gap is arranged between the particle pressing plate and the inner wall of the hopper body or a small hole is arranged on the particle pressing plate, and particles are arranged in the hopper body and positioned between an outlet of the hopper body and the particle pressing plate; the outlet of the hopper body is communicated with a glass guide pipe, and a dust flowmeter and a discharge valve are sequentially arranged on the glass guide pipe along the flow direction of particles. The particle loading system comprises an air inlet pipe, an air inlet spray pipe, an air outlet spray pipe, a combustion device and a test bench; the glass conduit is inserted into the air inlet pipe, the air inlet spray pipe, the combustion device and the exhaust spray pipe which are sequentially communicated, and the combustion device is arranged on the test bed; the air inlet pipe is communicated with an outlet of the main air inlet path, and the exhaust spray pipe is communicated with an exhaust device; the combustion device is of a cuboid structure and is made of transparent toughened glass, the internal pneumatic profiles of the air inlet spray pipe and the exhaust spray pipe are of a Laval spray pipe structure, and quartz glass windows are arranged on the side parts of the air inlet spray pipe and the exhaust spray pipe; the position of the glass conduit inserted into the air inlet pipe is positioned at the upper part of the central line of the air inlet pipe.

Furthermore, the hot air switching and bypass device comprises a hot air switching and bypass device cooling device and a hot air switching and bypass device electromagnetic valve which are sequentially arranged along the gas flow direction from the outlet of the main gas inlet path to the mixing section of the exhaust device in the exhaust device.

Furthermore, the process gas system comprises a gas inlet circuit and a plurality of process gas supply circuits which are arranged in parallel, wherein each process gas supply circuit comprises a plurality of process gas output circuits; two ends of the gas inlet path are respectively communicated with a compressed air source and inlets of a plurality of process gas supply paths which are arranged in parallel, and the gas inlet path is provided with an electromagnetic valve; the two ends of each process gas supply path are respectively communicated with the outlet of the gas inlet path and a plurality of process gas output paths, and each process gas supply path comprises a manual stop valve of the process gas supply path, an air filter, a first pressure reducing valve, a first pressure gauge, a second pressure reducing valve, a second pressure gauge and a buffer tank which are sequentially communicated through pipelines along the flowing direction of the process gas; two ends of each process gas output path are respectively communicated with an outlet of one process gas supply path and an operation gas source; along the flowing direction of the process gas, each process gas output path comprises a manual stop valve, a pressure measuring point and an operation gas source which are sequentially communicated through pipelines; the operation gas source is at least one of a main gas inlet circuit pressure regulating valve, a main gas inlet circuit first pneumatic ball valve, a process gas and liquid fuel supply system regulating valve, an oxygen supplement system regulating valve or a gas fuel supply system regulating valve.

Compared with the prior art, the invention has the advantages that:

1. the small-flow inflow parameter simulation air inlet system and the test bed can effectively realize accurate simulation of small-flow inflow parameters, can accurately and effectively control the mass flow of particles, form an effective closed-loop control system, and effectively observe the test state.

2. In the small-flow incoming flow parameter simulation air inlet system and the test bed, the cooling water system can effectively realize the cooling of the main air inlet path stable measurement section, the air inlet spray pipe and the bypass device, and the low-temperature cooling water is recycled, thereby not only meeting the test requirement, but also saving the water resource and taking the practicability and the economy into consideration; by arranging the cooling water input path filter and the cooling water main supply path filter, the cleanliness of the cooling water is improved, and the scaling of a cold water path is avoided; the liquid level and the water temperature of the water tank are effectively monitored by arranging a water tank liquid level meter and a water temperature measuring point, so that the water temperature of the supplied cooling water reaches a preset value; meanwhile, a cooling water main supply path water pump is adjusted through a cooling water main supply path pressure measuring point, so that the pressure of supplied cooling water meets a preset value, and in addition, a cooling path flowmeter of an air inlet spray pipe and a cooling path flowmeter of a main air inlet path stable measuring section are arranged to monitor the cooling water quantity of a cooling object so as to meet the condition that the cooling water supply quantity reaches the preset value; finally, by arranging a temperature measuring point of a cooling path of the air inlet spray pipe and a temperature measuring point of a cooling path of a stable measuring section of the main air inlet path, the heat exchange efficiency of the cooling water system to the heat exchange object is monitored so as to ensure the precision of the test bed and the cooling precision of the cooled object; through setting up cooling water input way main inlet air path stable measurement section, cooling water main supply way main inlet air path stable measurement section, the main inlet air pipe cooling circuit stable measurement section of air inlet, main inlet air path stable measurement section cooling circuit main inlet air path stable measurement section and hot-air switching and the main inlet air path stable measurement section of bypass device guarantee the stability of supplying water, and then improve the stability of whole test bed.

3. In the small-flow inflow parameter simulation air inlet system and the test bed, the oxygen supplementing system can accurately control the opening and closing of the oxygen valve and win-win by adopting a nitrogen pressurization mode, so that the explosion of an oxygen pipeline is avoided, and the safety and the applicability are both considered; by setting the monitoring of the related valves and the pressure gauge, the related parameters of the whole oxygen supply system can be effectively monitored in time, so that the precision of the whole oxygen supply system is improved, and meanwhile, the condition of oxygen pipeline explosion is avoided; the nitrogen blowing-off pipeline is arranged, the filling pipe blowing-off pipeline connected in parallel is set in a targeted mode, the main pipeline blowing-off pipeline and the pipeline blowing-off pipeline before spraying effectively blow off all key parts of the liquid oxygen supply pipeline, and the condition that grease or iron chips moving at high speed in the pipeline explode the oxygen pipeline is avoided.

4. In the small-flow inflow parameter simulation air inlet system and the test bed, a particle loading system firstly determines the inner diameter of a glass guide pipe according to the particle flow, then a pressure reducing valve and an air discharge electromagnetic valve regulate and control the pressure in a hopper, a dust mass flowmeter is arranged on the glass guide pipe to further form a closed-loop control system, a gap is reserved between a particle pressing plate and the edge of the hopper or a small hole is formed in the particle pressing plate to control a small amount of air to enter particles, the outlet of the glass guide pipe is positioned at the upper part of the central line of an air inlet pipe, the distance between the glass guide pipe and the air inlet pipe is controlled to control the distribution of the particles on the cross section of the air inlet pipe, a combustion device is arranged to be of a transparent structure.

5. According to the small-flow incoming flow parameter simulation air inlet system and the test bed, when the state parameters of the air inlet simulation system do not reach the required values (particularly when an electric heater is used), the bypass is opened, the inlet air flow flows into the exhaust device through the bypass, the thermal load of an experimental section is reduced, the temperature of bypass gas is reduced by adding the cooling device, and further the temperature of the inlet gas entering the exhaust device is reduced, so that the injection capacity of a subsequent injector is improved, the required performance of materials of the silencer is reduced, and further the cost is reduced. The inlet Laval nozzle is arranged at the front end of the inlet of the test section and the inlet of the bypass on the main air inlet path, so that the control of supersonic air inlet flow is realized, the stable input of the air inlet flow is realized, the arrangement of an air inlet valve is reduced, the cost of the whole test bed is further reduced, the valve is arranged as an electromagnetic valve, the corresponding speed of the valve is further improved, and the test efficiency is further improved.

6. In the small-flow inflow parameter simulation air inlet system and the test bed, the process gas system systematically integrates the process gas required by each subsystem, the structure is simple to set, the operation is easy, the corresponding speed is high, the purity of the process gas is improved by arranging the air filter, the service life of the valve is prolonged, the adjustment precision is improved, the adjustment range of the process gas is improved by secondary pressure reduction, so that the application range of the process gas system is wider, the process gas is buffered in the buffer tank by arranging the buffer tank, the process gas used by each process gas output path is the gas in the buffer tank, so that the corresponding speed and stability are improved, the monitoring of the process gas pressure after passing through the first pressure reducing valve and the second pressure reducing valve is realized by arranging the first pressure gauge and the second pressure gauge, and the precision of the process gas system is further improved, by arranging the pressure measuring points, the monitoring of the air source pressure of each operation air source is realized, so that the pressure supplied to the operation air source can meet the requirement of a preset value.

Drawings

FIG. 1 is a schematic diagram of a test bed with a low-flow-rate inflow parameter simulation air intake system according to the present invention.

FIG. 2 is a schematic diagram of a cooling water system in a test bed with a low inflow parameter simulation air intake system of the present invention.

Fig. 3 is a schematic diagram of a particle loading system in a test bed with a low-flow inflow parameter simulation air intake system according to the present invention.

FIG. 4 is a schematic diagram of a process gas system in a test bed with a low-flow-rate inflow parameter simulation air intake system according to the present invention.

Detailed Description

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-4, a small-flow inflow parameter simulation air intake system includes a main air intake path 100, a cooling water system 200, a liquid fuel supply system 300, an oxygen supplement system 400, and a gas fuel supply system 500. The cooling water system 200 is communicated with the main intake passage stability measurement section 111 in the main intake passage 100, and provides cooling water for the main intake passage stability measurement section 111. The liquid fuel supply system 300 and the gas fuel supply system 500 communicate with the main intake air path fuel heating apparatus 107 in the main intake air path 100 to supply fuel to the main intake air path fuel heating apparatus 107. The oxygenating system 400 is in communication with the main intake pathway oxygenating blender 106 in the main intake pathway 100 to provide liquid oxygen to the main intake pathway oxygenating blender 106 for combustion of fuel in the main intake pathway fuel heating apparatus 107. Preferably, in the gas flow direction from the gas source to the outlet of the main gas inlet circuit 100, the main gas inlet circuit 100 includes a main gas inlet circuit total cut-off valve 101, a main gas inlet circuit gas inlet flow meter 103, a main gas inlet circuit pressure regulating valve 104, a main gas inlet circuit first pneumatic ball valve 105, a main gas inlet circuit oxygen supplement mixer 106, a main gas inlet circuit fuel heating device 107, a main gas inlet circuit mixer 108 and a main gas inlet circuit stability measuring section 111 which are communicated through pipelines. The main air inlet path stability measurement section 111 is used for rectifying air flow in the main air inlet path, so that the air flow in the main air inlet path is stable, and meanwhile, the temperature, the pressure and the flow in the air flow in the main air inlet path are monitored. The small-flow inflow parameter simulation system can effectively realize accurate simulation of small-flow inflow parameters, can accurately and effectively control the mass flow of particles, becomes an effective closed-loop control system, and can effectively observe the test state.

Preferably, the main air intake passage 100 includes a main air intake passage heating passage, one end of the main air intake passage heating passage is communicated with a pipeline communicating the main air intake passage pressure regulating valve 104 and the main air intake passage first pneumatic ball valve 105, the other end of the main air intake passage heating passage is communicated with the main air intake passage blender 108, and the main air intake passage heating passage includes a main air intake passage second pneumatic ball valve 109 and a main air intake passage electric heater 110 which are sequentially communicated with each other through pipelines along a gas flow direction communicating the main air intake passage pressure regulating valve 104 and the main air intake passage first pneumatic ball valve 105 to the main air intake passage blender 108. Through setting up main air inlet circuit heating circuit, preheat the mixing to the air of main air inlet circuit blender 108 has improved mixing efficiency, has reduced main air inlet circuit fuel heating device 107's load simultaneously, in addition, through setting up main air inlet circuit second pneumatic ball valve, has realized the flow of mixing air.

Preferably, the liquid fuel supply system 300 and the oxygen supplement system 400 comprise a common nitrogen source and pressure reducing valve 350, and the liquid fuel supply system 300 and the oxygen supplement system 400 are arranged in parallel; wherein the liquid fuel supply system 300 includes a liquid fuel supply system fuel supply line 310 and a liquid fuel supply system blow-off line 320, in the direction of flow of the liquid fuel from the nitrogen source to the main intake passage fuel heating apparatus 107, the liquid fuel supply system fuel supply line 310 includes a pressure reducing valve 350, a liquid fuel supply system first electromagnetic valve 301, a fuel tank 330, a liquid fuel supply system filter 302, a liquid fuel supply system second electromagnetic valve 303, a liquid fuel supply system flow meter 304, a liquid fuel supply system regulating valve 305 and a liquid fuel supply system third electromagnetic valve 306 which are communicated through a pipe; one end of the liquid fuel supply system blow-off line 320 is communicated with a pipeline communicated between the pressure reducing valve 350 and the liquid fuel supply system first electromagnetic valve 301, the other end of the liquid fuel supply system blow-off line is communicated with a pipeline communicated between the liquid fuel supply system second electromagnetic valve 303 and the liquid fuel supply system flow meter 304, and a liquid fuel supply system fourth electromagnetic valve 307 is arranged on the liquid fuel supply system blow-off line 320; the oxygenating system 400 comprises an oxygenating system liquid oxygen supply path 410 and an oxygenating system blowing path 420, and along the flow direction of liquid oxygen from a nitrogen source to the main air inlet path oxygenating blender 106, the oxygenating system liquid oxygen supply path 410 comprises a pressure reducing valve 350, an oxygenating system first electromagnetic valve 401, a liquid oxygen storage tank 430, an oxygenating system second electromagnetic valve 402, an oxygenating system flow meter 403, an oxygenating system regulating valve 404 and an oxygenating system third electromagnetic valve 405 which are communicated through pipelines; one end of the oxygen supplementing system blowing way 420 is communicated with a pipeline communicated between the pressure reducing valve 350 and the first oxygen supplementing system electromagnetic valve 401, the other end of the oxygen supplementing system blowing way is communicated with a pipeline communicated between the second oxygen supplementing system electromagnetic valve 402 and the oxygen supplementing system flow meter 403, and the fourth oxygen supplementing system electromagnetic valve 406 is arranged on the oxygen supplementing system blowing way 420. The oxygen supplementing system can accurately control the opening and closing of the oxygen valve, and win-win in a nitrogen pressurization mode, so that the explosion of an oxygen pipeline is avoided, and the safety and the applicability are both considered; by setting the monitoring of the related valves and the pressure gauge, the related parameters of the whole oxygen supply system can be effectively monitored in time, so that the precision of the whole oxygen supply system is improved, and meanwhile, the condition of oxygen pipeline explosion is avoided; the nitrogen blowing-off pipeline is arranged, the filling pipe blowing-off pipeline connected in parallel is set in a targeted mode, the main pipeline blowing-off pipeline and the pipeline blowing-off pipeline before spraying effectively blow off all key parts of the liquid oxygen supply pipeline, and the condition that grease or iron chips moving at high speed in the pipeline explode the oxygen pipeline is avoided.

Preferably, in the gas fuel flow direction from the gas cylinder to the main intake passage fuel heating apparatus 107, the gas fuel supply system 500 includes a gas cylinder 501, a gas fuel supply system first electromagnetic valve 502, a gas fuel supply system pressure reducing valve 503, a gas fuel supply system regulating valve 504, a gas fuel supply system flow meter 505, and a gas fuel supply system second electromagnetic valve 506, which are sequentially communicated through a pipe. The flow regulation and monitoring of the gas fuel are realized by arranging the valve and the flowmeter, and the precision of the whole system is further improved.

A test bed comprises the small-flow inflow parameter simulation air inlet system, the particle loading system 600, the hot air switching and bypass device 700, the exhaust device 800 and the process gas system 900. The cooling water system 200 is communicated with the inlet nozzle 622 of the particle loading system 600 and the hot air switching and bypass device cooling device 710 of the hot air switching and bypass device 700, respectively, to provide cooling water for the inlet nozzle 622 and the hot air switching and bypass device cooling device 710. Both ends of the particle loading system 600 are respectively communicated with the outlet of the main air intake passage 100 and the inlet of the exhaust device 800, and both ends of the hot air switching and bypass device 700 are respectively communicated with the outlet of the main air intake passage 100 and the exhaust device 800. The process gas system 900 is in communication with the operating gas sources of the pneumatic valves of the main gas inlet 100, the liquid fuel supply system 300, the oxygenating system 400, and the gaseous fuel supply system 500, respectively.

Preferably, the cooling water system 200 includes a cooling water input path 210, a water tank 214, a cooling water main supply path 220, an intake nozzle cooling path 230, a main intake path stable measurement section cooling path 240 and a hot air switching and bypass device cooling path 260; the water tank 214 comprises a cooling water injection port, a cooling water outlet and a water return port, and the water tank 214 comprises a water tank liquid level meter 215 and a water temperature measuring point 216; a cooling water inlet along a tap water inlet to the water tank 214, wherein the cooling water inlet path 210 comprises a cooling water inlet path manual stop valve 211, a cooling water inlet path filter 212 and a cooling water inlet path stabilizing section 213 which are communicated through pipelines; along the cooling water outlet of the water tank 214 to the inlet nozzle cooling path 230, the main inlet air path stability measurement section cooling path 240, the exhaust device cooling path 250 and the inlet of the hot air switching and bypass device cooling path 260, the cooling water main supply path 220 comprises a cooling water main supply path stability section 221, a cooling water main supply path filter 222, a cooling water main supply path water pump 223 and a cooling water main supply path pressure measuring point 224 which are communicated through pipelines; the intake nozzle cooling circuit 230 comprises an intake nozzle cooling water supply path 232 and an intake nozzle cooling circuit water return path 233, two ends of the intake nozzle cooling water supply path 232 are respectively communicated with an outlet of the cooling water main supply path 220 and an inlet of the cooling pipeline of the intake nozzle 622 along the flow direction of cooling water, an intake nozzle cooling circuit flowmeter 234 and an intake nozzle cooling circuit stabilizing section 235 are sequentially arranged on the intake nozzle cooling water supply path 232 along the flow direction of cooling water, two ends of the intake nozzle cooling circuit water return path 233 are respectively communicated with an outlet of the cooling pipeline of the intake nozzle 231 and a water return port of the water tank 214, and an intake nozzle cooling circuit temperature measuring point 236 is arranged on the intake nozzle cooling circuit water return path 233; the main air inlet passage stability measurement section cooling path 240 comprises a main air inlet passage stability measurement section cooling water supply path 242 and a main air inlet passage stability measurement section cooling water return path 243, two ends of the main air inlet passage stability measurement section cooling water supply path 242 are respectively communicated with an outlet of the cooling water main supply path 220 and an inlet of the cooling pipeline of the main air inlet passage stability measurement section 111 along the flow direction of cooling water, and a main air inlet passage stability measurement section cooling path flowmeter 244 and a main air inlet passage stability measurement section cooling path stability section 245 are sequentially arranged on the main air inlet passage stability measurement section cooling water supply path 242 along the flow direction of cooling water; two ends of the cooling circuit return circuit 243 of the main air inlet circuit stable measurement section are respectively communicated with the cooling circuit outlet of the main air inlet circuit stable measurement section 241 and the water return port of the water tank 214, and the cooling circuit return circuit 243 of the main air inlet circuit stable measurement section is provided with a temperature measuring point 246 of the cooling circuit of the main air inlet circuit stable measurement section; along the flow direction of the cooling water; both ends of the hot air switching and bypass device cooling circuit 260 communicate with the outlet of the cooling water main supply circuit 220 and the inlet of the cooling water circuit of the cooling device 710 in the hot air switching and bypass device cooling circuit 900, respectively, in the flow direction of the cooling water, and the hot air switching and bypass device cooling circuit 260 is provided with a hot air switching and bypass device stabilizing section 262. The cooling water system can effectively realize the cooling of the main air inlet path stable measurement section, the air inlet spray pipe, the exhaust device and the bypass device, and recycles the low-temperature cooling water, thereby not only meeting the test requirements, but also saving water resources and taking the practicability and the economy into consideration; by arranging the cooling water input path filter and the cooling water main supply path filter, the cleanliness of the cooling water is improved, and the scaling of a cold water path is avoided; the liquid level and the water temperature of the water tank are effectively monitored by arranging a water tank liquid level meter and a water temperature measuring point, so that the water temperature of the supplied cooling water reaches a preset value; meanwhile, a cooling water main supply path water pump is adjusted through a cooling water main supply path pressure measuring point, so that the pressure of supplied cooling water meets a preset value, and in addition, a cooling path flowmeter of an air inlet spray pipe and a cooling path flowmeter of a main air inlet path stable measuring section are arranged to monitor the cooling water quantity of a cooling object so as to meet the condition that the cooling water supply quantity reaches the preset value; finally, by arranging a temperature measuring point of a cooling path of the air inlet spray pipe and a temperature measuring point of a cooling path of a stable measuring section of the main air inlet path, the heat exchange efficiency of the cooling water system to the heat exchange object is monitored so as to ensure the precision of the test bed and the cooling precision of the cooled object; through setting up cooling water input way main inlet air path stable measurement section, cooling water main supply way main inlet air path stable measurement section, the main inlet air pipe cooling circuit stable measurement section of air inlet, main inlet air path stable measurement section cooling circuit main inlet air path stable measurement section and hot-air switching and the main inlet air path stable measurement section of bypass device guarantee the stability of supplying water, and then improve the stability of whole test bed.

Preferably, the particle loading system 600 includes a hopper 601, particles 604, a glass conduit 605, a soot flow meter 606, a pressure reducing valve 607, a bleed solenoid valve 608, a bleed valve 609, and a particle loading unit gas source 630; the particle loading device gas source 630 is communicated with the pressure reducing valve 607, and the outlet of the pressure reducing valve 607 is respectively communicated with the hopper 601 and the air bleed solenoid valve 608 through pipelines; the hopper 601 comprises a hopper body 601, a hopper upper cover 602 is arranged on the hopper body, a particle pressing plate 603 is arranged in the hopper body, a gap is arranged between the particle pressing plate 603 and the inner wall of the hopper body or a small hole is arranged on the particle pressing plate 603, and the particles 604 are arranged in the hopper body and positioned between the outlet of the hopper body and the particle pressing plate 603; the outlet of the hopper body is communicated with the glass conduit 605, and a dust flow meter 606 and a discharge valve 609 are sequentially arranged on the glass conduit 605 along the flow direction of particles; the particle loading system 600 further comprises an air inlet pipe 621, an air inlet spray pipe 622, an air outlet spray pipe 623, a combustion device 624 and a test bench 625; the glass conduit 605 is inserted into the air inlet pipe 621, the air inlet spray pipe 622, the combustion device 624 and the exhaust spray pipe 623 are communicated in sequence, and the combustion device is arranged on a 625 test bench; the air inlet pipe 621 is communicated with an outlet of the main air inlet path 100, and the exhaust nozzle 623 is communicated with the exhaust device 800; the combustion device 624 is of a cuboid structure and is made of transparent toughened glass, the pneumatic outlines inside the air inlet spray pipe 622 and the air exhaust spray pipe 623 are of a Laval spray pipe structure, and quartz glass windows are arranged on the side portions of the air inlet spray pipe and the air exhaust spray pipe; the position where the glass guide 605 is inserted into the air inlet pipe 621 is located at the upper part of the center line of the air inlet pipe. Preferably, the inner wall of the glass conduit 605 is smooth to facilitate the flow of particles.

Further preferably, the discharge valve 609 is a plate-type discharge valve. The particle loading system firstly determines the inner diameter of a glass conduit according to the particle flow, secondly adjusts and controls the pressure in a hopper through a pressure reducing valve and an air discharging electromagnetic valve, the glass conduit is provided with a dust mass flow meter to form a closed loop control system, a gap is reserved between a particle pressing plate and the edge of the hopper or a small hole is formed in the particle pressing plate to control a small amount of air to enter particles, the outlet of the glass conduit is positioned at the upper part of the central line of an air inlet pipe, the distance between the particle pressing plate and the hopper is controlled to control the distribution of the particles on the cross section of the air inlet pipe, a combustion device is set to be a transparent structure, meanwhile, quartz.

Preferably, the communicating hot air switching and bypass device 700 includes a hot air switching and bypass device cooling device 710 and a hot air switching and bypass device solenoid valve 720, which are sequentially disposed in a gas flow direction from the outlet of the main intake passage 100 to the exhaust device 800. When the state parameters of the air inlet simulation system do not reach the required values (especially when an electric heater is used), the hot air switching and bypass device opens the bypass, the air inlet flow flows into the exhaust device through the bypass, the thermal load of an experimental section is reduced, the temperature of bypass gas is reduced by adding the cooling device, and then the temperature of the bypass gas is reduced, so that the temperature of the bypass gas entering the exhaust device is reduced, the injection capacity of a subsequent injector is improved, the material required performance of the silencer is reduced, and the cost is reduced. The inlet Laval nozzle is arranged at the front end of the inlet of the main air inlet path and positioned at the test section and the front end of the inlet of the bypass, so that the control of supersonic air inlet flow is realized, the stable input of the air inlet flow is realized, the arrangement of an air inlet valve is reduced, the cost of the whole test bed is further reduced, the valve is arranged as an electromagnetic valve, the corresponding speed of the valve is further improved, and the test efficiency is further improved.

Preferably, the process gas system 900 includes a gas inlet path 910, a plurality of process gas supply paths 920 arranged in parallel, and each process gas supply path 920 includes a plurality of process gas output paths 930. Two ends of the gas inlet path 910 are respectively communicated with a compressed air source and inlets of the plurality of process gas supply paths 920 which are arranged in parallel, and the gas inlet path 910 is provided with an electromagnetic valve 911; the two ends of each process gas supply path 920 are respectively communicated with the outlet of the gas inlet path 910 and the plurality of process gas output paths 930, and along the flowing direction of the process gas, each process gas supply path 920 comprises a process gas supply path manual stop valve 921, an air filter 922, a first pressure reducing valve 923, a first pressure gauge 926, a second pressure reducing valve 924, a second pressure gauge 927 and a buffer tank 925 which are sequentially communicated through pipelines; two ends of each process gas output path 930 are respectively communicated with an outlet of one process gas supply path 920 and an operation gas source; along the flowing direction of the process gas, each process gas output path 930 comprises a process gas output path manual stop valve 931, a stop valve 932, a pressure measuring point 933 and an operation gas source 934 which are sequentially communicated through pipelines; the operating gas source 934 is at least one of the main inlet pressure regulator 104, the main inlet first pneumatic ball valve 105, the process gas 109, the liquid fuel supply system regulator 305, the oxygenating system regulator 404, or the pneumatic valve of the gaseous fuel supply system regulator 504.

The process gas system systematically integrates the process gas required by each subsystem, has simple structure, easy operation and high corresponding speed, improves the purity of the process gas by arranging an air filter, prolongs the service life of a valve, simultaneously improves the regulation precision, improves the regulation range of the process gas by secondary pressure reduction so as to ensure that the application range of the process gas system is larger, buffers the process gas in the buffer tank by arranging the buffer tank, improves the corresponding speed and stability by using the process gas used by each process gas output path as the gas in the buffer tank, realizes the monitoring of the process gas pressure after passing through the first pressure reducing valve and the second pressure reducing valve by arranging the first pressure gauge and the second pressure gauge so as to improve the precision of the process gas system, realizes the monitoring of the gas source pressure of each operation gas source by arranging the pressure measuring point, to ensure that the pressure supplied to the operating air supply meets the predetermined value.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A small-flow inflow parameter simulation air inlet system is characterized by comprising a main air inlet path, a cooling water system, a liquid fuel supply system, an oxygen supplementing system and a gas fuel supply system;

the cooling water system is connected with the main air inlet circuit in the main air inlet circuit for stable measurement, and is a main air inlet circuit stable measurement section, an air inlet spray pipe and a hot air switching and bypass device cooling device;

the liquid fuel supply system and the gas fuel supply system are communicated with a main air inlet path fuel heating device in a main air inlet path to provide fuel for the main air inlet path fuel heating device;

the oxygen supplementing system is communicated with a main air inlet circuit oxygen supplementing blender in the main air inlet circuit, provides liquid oxygen for the main air inlet circuit oxygen supplementing blender and is used for burning fuel in the main air inlet circuit fuel heating device.

2. The system of claim 1, wherein the main intake passage comprises, in a direction of gas flow from the gas source to the outlet of the main intake passage, a main intake passage main stop valve, a main intake passage intake flow meter, a main intake passage pressure regulating valve, a main intake passage first pneumatic ball valve, a main intake passage oxygenating blender, a main intake passage fuel heating device, a main intake passage blender, and a main intake passage stability measuring section, all of which are connected by a pipeline.

3. The system of claim 2, wherein the main intake air circuit comprises a main intake air circuit heating circuit, one end of the main intake air circuit heating circuit is communicated with a pipeline communicated with the main intake air pressure regulating valve and the main intake air circuit first pneumatic ball valve, the other end of the main intake air circuit heating circuit is communicated with the main intake air circuit blender, and the main intake air circuit heating circuit comprises a main intake air circuit second pneumatic ball valve and a main intake air circuit electric heater which are sequentially communicated with each other through pipelines along the gas flow direction communicated from the pipeline communicated with the main intake air pressure regulating valve and the main intake air circuit first pneumatic ball valve to the main intake air circuit blender.

4. The system of claim 1, wherein the liquid fuel supply system and the oxygenating system include a common nitrogen source and pressure reducing valve, the liquid fuel supply system and the oxygenating system being arranged in parallel; wherein the content of the first and second substances,

the liquid fuel supply system comprises a liquid fuel supply system fuel supply circuit and a liquid fuel supply system blow-off circuit;

along the flowing direction of liquid fuel from a nitrogen source to the main air inlet path fuel heating device, a fuel supply path of a liquid fuel supply system comprises a pressure reducing valve, a first electromagnetic valve of the liquid fuel supply system, a fuel tank, a filter of the liquid fuel supply system, a second electromagnetic valve of the liquid fuel supply system, a flowmeter of the liquid fuel supply system, a regulating valve of the liquid fuel supply system and a third electromagnetic valve of the liquid fuel supply system which are communicated through pipelines;

one end of the liquid fuel supply system blow-off line is communicated with a pipeline communicated between the pressure reducing valve and the first electromagnetic valve of the liquid fuel supply system, the other end of the liquid fuel supply system blow-off line is communicated with a pipeline communicated between the second electromagnetic valve of the liquid fuel supply system and the flowmeter of the liquid fuel supply system, and a fourth electromagnetic valve of the liquid fuel supply system is arranged on the liquid fuel supply system blow-off line;

the oxygenating system comprises an oxygenating system liquid oxygen supply path and an oxygenating system blowing path, and the oxygenating system liquid oxygen supply path comprises a pressure reducing valve, an oxygenating system first electromagnetic valve, a liquid oxygen storage tank, an oxygenating system second electromagnetic valve, an oxygenating system flow meter, an oxygenating system regulating valve and an oxygenating system third electromagnetic valve which are communicated through a pipeline along the flow direction of liquid oxygen from a nitrogen source to the main air inlet path oxygenating blender;

one end of the oxygen supplementing system blowing way is communicated with a pipeline communicated between the pressure reducing valve and the first electromagnetic valve of the oxygen supplementing system, the other end of the oxygen supplementing system blowing way is communicated with a pipeline communicated between the second electromagnetic valve of the oxygen supplementing system and the flow meter of the oxygen supplementing system, and a fourth electromagnetic valve of the oxygen supplementing system is arranged on the oxygen supplementing system blowing way.

5. The system of claim 1, wherein the gaseous fuel supply system comprises, in the direction of flow of gaseous fuel from the gas cylinder to the main inlet line fuel heating means, a gas cylinder, a gaseous fuel supply system first solenoid valve, a gaseous fuel supply system pressure reducing valve, a gaseous fuel supply system regulating valve, a gaseous fuel supply system flow meter, and a gaseous fuel supply system second solenoid valve, all of which are connected in series by a conduit.

6. A test bed comprising a small flow incoming flow parametric simulation air induction system as claimed in any one of claims 1 to 5, characterized by comprising a particle loading system, a hot air switching and bypass device, an exhaust device and a process gas system; the cooling water system is respectively an air inlet spray pipe and a hot air switching and bypass device cooling device in the particle loading system and a hot air switching and bypass device cooling device in the bypass device, and the air inlet spray pipe and the hot air switching and bypass device cooling device are used as the air inlet spray pipe and the hot air switching and bypass device cooling device; two ends of the particle loading system are respectively communicated with an outlet of the main air inlet path and an inlet of the exhaust device; two ends of the hot air switching and bypass device are respectively communicated with an outlet of the main air inlet path and the exhaust device; the process gas system is respectively communicated with the main gas inlet circuit, the liquid fuel supply system, the oxygen supplement system and the operation gas source of the pneumatic valve of the gas fuel supply system.

7. The test bed according to claim 6, wherein the cooling water system includes a cooling water input path, a water tank, a cooling water main supply path, an intake nozzle cooling path, a main intake path stability measurement section cooling path, and a hot air switching and bypass device cooling path;

the water tank comprises a cooling water injection port, a cooling water outlet and a water return port, and comprises a water tank liquid level meter and a water temperature measuring point; a cooling water inlet along a tap water inlet to a cooling water injection port of the water tank, wherein the cooling water input path comprises a cooling water input path manual stop valve, a cooling water input path filter and a cooling water input path stabilizing section which are communicated through a pipeline;

the cooling water main supply path comprises a cooling water main supply path stable section, a cooling water main supply path filter, a cooling water main supply path water pump and a cooling water main supply path pressure measuring point, wherein the cooling water main supply path is communicated with the cooling water main supply path stable section through a pipeline;

the cooling path of the air inlet spray pipe comprises an air inlet spray pipe cooling water supply path and an air inlet spray pipe cooling path water return path, two ends of the air inlet spray pipe cooling water supply path are respectively communicated with an outlet of a cooling water main supply path and an inlet of a cooling pipeline of the air inlet spray pipe along the flow direction of cooling water, an air inlet spray pipe cooling path flowmeter and an air inlet spray pipe cooling path stabilizing section are sequentially arranged on the air inlet spray pipe cooling water supply path along the flow direction of the cooling water, two ends of the air inlet spray pipe cooling path water return path are respectively communicated with an outlet of the cooling pipeline of the air inlet spray pipe and a water return port of a water tank, and an air inlet spray pipe cooling path;

the cooling circuit of the main air inlet path stability measurement section comprises a cooling water supply circuit of the main air inlet path stability measurement section and a cooling water return circuit of the main air inlet path stability measurement section, the two ends of the cooling water supply circuit of the main air inlet path stability measurement section are respectively communicated with the outlet of the cooling water main supply circuit and the inlet of the cooling circuit of the main air inlet path stability measurement section along the flow direction of cooling water, and a cooling circuit flowmeter of the main air inlet path stability measurement section and a cooling circuit stability section of the main air inlet path stability measurement section are sequentially arranged on the cooling water supply circuit of the main air inlet path stability measurement section along the flow direction of the cooling water; two ends of a cooling path water return path of the main air inlet path stability measurement section are respectively communicated with a cooling path outlet of the main air inlet path stability measurement section and a water return port of the water tank, and a cooling path water return path of the main air inlet path stability measurement section is provided with a temperature measuring point of the cooling path of the main air inlet path stability measurement section;

along the flowing direction of cooling water, two ends of a hot air switching and bypass device cooling circuit are respectively communicated with an outlet of a cooling water main supply circuit and an inlet of a cooling water pipeline of a cooling device in the hot air switching and bypass device cooling circuit, and the hot air switching and bypass device cooling circuit is provided with a hot air switching and bypass device stabilizing section.

8. The test bed of claim 6, wherein the particle loading system comprises a hopper, particles, a glass conduit, a dust flow meter, a pressure relief valve, a bleed solenoid valve, a discharge valve, and a particle loading device gas source; the air source of the particle loading device is communicated with a pressure reducing valve, and the outlet of the pressure reducing valve is respectively communicated with the hopper and the air bleed solenoid valve through pipelines; the hopper comprises a hopper body, an upper cover of the hopper is arranged on the hopper body, a particle pressing plate is arranged in the hopper body, a gap is arranged between the particle pressing plate and the inner wall of the hopper body or a small hole is arranged on the particle pressing plate, and particles are arranged in the hopper body and positioned between an outlet of the hopper body and the particle pressing plate; the outlet of the hopper body is communicated with a glass guide pipe, and a dust flowmeter and a discharge valve are sequentially arranged on the glass guide pipe along the flow direction of particles;

the particle loading system comprises an air inlet pipe, an air inlet spray pipe, an air outlet spray pipe, a combustion device and a test bench; the glass conduit is inserted into the air inlet pipe, the air inlet spray pipe, the combustion device and the exhaust spray pipe which are sequentially communicated, and the combustion device is arranged on the test bed; the air inlet pipe is communicated with an outlet of the main air inlet path, and the exhaust spray pipe is communicated with an exhaust device;

the combustion device is of a cuboid structure and is made of transparent toughened glass, the internal pneumatic profiles of the air inlet spray pipe and the exhaust spray pipe are of a Laval spray pipe structure, and quartz glass windows are arranged on the side parts of the air inlet spray pipe and the exhaust spray pipe; the position of the glass conduit inserted into the air inlet pipe is positioned at the upper part of the central line of the air inlet pipe.

9. The test bed according to claim 6, wherein the hot air switching and bypass device comprises a hot air switching and bypass device cooling device and a hot air switching and bypass device solenoid valve which are arranged in sequence along the gas flow direction from the outlet of the main gas inlet path to the mixing section of the exhaust device in the exhaust device.

10. The test bed according to any one of claims 6 to 9, wherein the process gas system comprises a gas inlet path, a plurality of process gas supply paths arranged in parallel, each process gas supply path comprising a plurality of process gas output paths;

two ends of the gas inlet path are respectively communicated with a compressed air source and inlets of a plurality of process gas supply paths which are arranged in parallel, and the gas inlet path is provided with an electromagnetic valve; the two ends of each process gas supply path are respectively communicated with the outlet of the gas inlet path and a plurality of process gas output paths, and each process gas supply path comprises a manual stop valve of the process gas supply path, an air filter, a first pressure reducing valve, a first pressure gauge, a second pressure reducing valve, a second pressure gauge and a buffer tank which are sequentially communicated through pipelines along the flowing direction of the process gas;

two ends of each process gas output path are respectively communicated with an outlet of one process gas supply path and an operation gas source; along the flowing direction of the process gas, each process gas output path comprises a manual stop valve, a pressure measuring point and an operation gas source which are sequentially communicated through pipelines;

the operation gas source is at least one of a main gas inlet circuit pressure regulating valve, a main gas inlet circuit first pneumatic ball valve, a process gas and liquid fuel supply system regulating valve, an oxygen supplement system regulating valve or a gas fuel supply system regulating valve.