CN109724805A - A kind of purging system of air heating apparatus and blow down method - Google Patents
A kind of purging system of air heating apparatus and blow down method Download PDFInfo
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- CN109724805A CN109724805A CN201811499766.3A CN201811499766A CN109724805A CN 109724805 A CN109724805 A CN 109724805A CN 201811499766 A CN201811499766 A CN 201811499766A CN 109724805 A CN109724805 A CN 109724805A
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Abstract
The present invention relates to a kind of purging system of air heating apparatus and method is blown down, solves the problems, such as that combustion chamber tempering leads to heating device ejector filler face or nozzle erosion when being easy to appear detonation or explosion danger, shutdown when the work of existing heating device.The system includes gas cylinder, liquid oxygen road starts blowing unit, alcohol road starts blowing unit, unit is blown down in the shutdown of alcohol road and liquid oxygen road shuts down and blows down unit；Liquid oxygen road starts and blows down unit, unit is blown down in the starting of alcohol road, unit is blown down in the shutdown of alcohol road, the import of liquid oxygen road shutdown blowing unit is connect with the outlet of gas cylinder；The outlet that liquid oxygen road starts blowing unit is connect with the outlet of liquid oxygen supply line, and the outlet that alcohol road starts blowing unit is connect with the outlet of alcohol supply line；The outlet that unit, liquid oxygen road shutdown blowing unit are blown down in the shutdown of alcohol road is connect with air heating apparatus.
Description
Technical field
The present invention relates to punching engines to test field, and in particular to a kind of purging system of air heating apparatus and blowing
Method, specifically for air heating apparatus in a kind of punching engine ground experiment start it is weak blow and shut down the purging system blown by force and
Method.
Background technique
For the ground experiment under punching engine difference flying height, different Mach number state of flight, air heating dress
It is empty to set static temperature, static pressure met under punching engine live flying state by the way of liquid oxygen and alcohol burn heating air etc.
The requirement of gas incoming flow.
Currently, the working medium moment that heating device in ignition start, is passed through combustion chamber adds up more, starting transient energy mistake
In concentration, the danger of detonation or explosion is easy to appear when igniter works normally.Engine medium supply system (liquid oxygen/
Alcohol) from air heating apparatus nozzle at high speeds spray when, due to the momentum-exchange and ejector action with ambient gas.When shutdown,
Liquid oxygen and alcohol main valve are closed suddenly, and combustion gas is caused nearby to flow back to ejector filler, so that recirculating zone is formed, the gas in this region
The mixed gas that body is made of the combustible gases and burnt gas that are formed after propellant evaporation, therefore combustion chamber is tempered when shutdown
Lead to heating device ejector filler face or nozzle erosion, influences test progress, it is at high cost.
Summary of the invention
Present invention aim to address burnings when being easy to appear detonation or explosion danger, shutdown when the work of existing heating device
The problem of room tempering leads to heating device ejector filler face or nozzle erosion, provide a kind of purging system of air heating apparatus.
The technical scheme is that
A kind of purging system of air heating apparatus, including gas cylinder, liquid oxygen road start and blow down unit, the starting blowing of alcohol road
Unit, the shutdown of alcohol road blow down unit and unit is blown down in the shutdown of liquid oxygen road；The liquid oxygen road starts and blows down unit, alcohol road starts
Blow down unit, unit is blown down in the shutdown of alcohol road, the import of liquid oxygen road shutdown blowing unit is connect with the outlet of gas cylinder；The liquid
Oxygen road, which starts, blows down the outlet of unit and connect with the outlet of liquid oxygen supply line, the alcohol road start blowing unit outlet and
The outlet of alcohol supply line connects；Unit is blown down in alcohol road shutdown, the shutdown of liquid oxygen road blow down the outlet of unit with sky
The connection of gas heating device；The liquid oxygen road start blow down unit include the first pipeline and by the first pipeline import to outlet according to
The first pressure reducer, first filter, the first pneumatic stopping valve, the first check valve and the first orifice plate of secondary setting；The alcohol road
Starting and blowing down unit includes the second pipeline and the second pressure reducer set gradually by the second pipeline import to outlet, the second mistake
Filter, the second pneumatic stopping valve, second one-way valve and the second orifice plate；Alcohol road shutdown blow down unit include third pipeline,
And third pressure reducer, third filter, third pneumatic stopping valve, the third list set gradually by the import of third pipeline to outlet
To valve and third orifice plate；Liquid oxygen road shutdown blow down unit include the 4th pipeline and by the 4th pipeline import to outlet according to
The 4th pressure reducer, the 4th filter, the 4th pneumatic stopping valve, the 4th check valve and the 4th orifice plate of secondary setting.
Further, the pneumatic panel includes that air-source inflow valve, air delivery valve, pressure regulation air delivery valve, pressure regulation intake valve, pressure regulation subtract
Depressor, pressure regulation vent valve, intake valve, the 5th pressure reducer, vent valve and deflation collecting pipe, the pressure regulation intake valve, pressure regulation decompression
Device and pressure regulation vent valve are set gradually, and the intake valve, the 5th pressure reducer and vent valve are set gradually；The air-source inflow valve
Outlet is connect with pressure regulation intake valve, intake valve respectively；The outlet of pressure regulation vent valve, vent valve is connect with deflation collecting pipe, and
And the 5th the outlet of pressure reducer also connect with air delivery valve, the outlet of pressure regulation pressure reducer also passes through pressure regulation air delivery valve and the 5th pressure reducer
Control chamber connection, the outlet end of deflation collecting pipe is provided with flange.
Further, first pneumatic stopping valve, the second pneumatic stopping valve, third pneumatic stopping valve, the 4th pneumatic section
Only the inlet ductwork of valve uses metal hose.
Further, the 5th check valve is additionally provided between first check valve and the first orifice plate；Described second is unidirectional
The 6th check valve is additionally provided between valve and the second orifice plate.
Further, the 7th check valve is additionally provided between the third check valve and third orifice plate.
Further, the 8th check valve is additionally provided between the 4th check valve and the 4th orifice plate.
Further, first pipeline, the second pipeline, third pipeline, the 4th pipeline are provided with pressure sensor.
Further, first orifice plate, the second orifice plate, third orifice plate, the 4th orifice plate are velocity of sound orifice plate.
Meanwhile the present invention also provides a kind of blowing methods of air heating apparatus, comprising the following steps:
1) indifferent gas of certain flow is passed through before air heating apparatus igniting to alcohol supply line and liquid oxygen supply line
Body realizes the atomization of liquid oxygen and alcohol supplying media in air heating apparatus, and flow is to pass through formulaCalculating is asked
?；
Wherein: C- orifice flow constant；A- orifice throttle area, m2；P- orifice plate inlet set pressure, MPa；K- nitrogen ratio
Example coefficient；T- temperature；G- flow kg/s；
2) after air heating apparatus shutdown, the inert gas for being passed through certain flow to air heating apparatus is purged, stream
Amount passes through formulaCalculating acquires.
Further, in step 1), K=0.0397, T=283K.
Compared with prior art, the present invention having following technical effect that
1. purging system of the present invention is passed through before air heating apparatus igniting to alcohol supply line and liquid oxygen supply line
The inert gas of certain pressure and flow realizes the atomization of liquid oxygen and alcohol supplying media in air heating apparatus, makes it uniformly
Distribution, avoid it from being gathered at one, so as to avoid air heating apparatus start moment due to energy concentrate and occur detonation or
The possibility of explosion, it is ensured that air heating apparatus can be according to normal timing flexibility starting.
2. purging system of the present invention carries out alcohol supply line and liquid oxygen supply line after air heating apparatus shutdown
Inert gas is blown down, and prevents from leading to the face ablation of air heating apparatus ejector filler due to tempering, it is ensured that the normal work of air heating apparatus
Make.
3. the method for the present invention starts weak blow and the strong mode of blowing of shut down guarantees that air heating apparatus is put down using air heating apparatus
It surely starts, shut down and work normally, improve device security and reliability.Air heating dress is realized using the weak mode of blowing is started
The flexibility starting set, it is ensured that heater stable working avoids air heating apparatus shutdown tempering from causing using the strong mode of blowing of shutting down
Air heating apparatus ejector filler ablation.
4. present system solves medium backward flow problem using double check valve, the reliability of amplified medium supply system and steady
It is qualitative.
5. when carrying out engine test, first with inert gas to air heating apparatus medium supply system pipeline, valve
It is blown down with cavity etc., prevents cryogenic propellant from the oxygen and the solidification such as vapor in air are led to valve during startup
Door failure and test run failure.
6. present system supply line is longer, it is also easy to produce thermal walking during engine thermal testing, using metal hose
And change pipeline trend carries out flexible compensation to pipeline.
Detailed description of the invention
Fig. 1 is purging system's schematic diagram of air heating apparatus of the present invention；
Fig. 2 is pneumatic panel structural schematic diagram of the present invention.
Appended drawing reference: 1- gas cylinder, 2- pneumatic panel, 3- air heating apparatus, 4- pressure sensor, 21- air-source inflow valve,
24- pressure regulation intake valve, 25- pressure regulation pressure reducer, 23- pressure regulation air delivery valve, 26- pressure regulation vent valve, 27- intake valve, 28- the 5th are depressurized
Device, 29- vent valve, 22- air delivery valve, 211- deflation collecting pipe, 210- flange, the first pipeline of 31-, the first pressure reducer of 32-, 33-
First filter, the first pneumatic stopping valve of 34-, the first check valve of 35-, the first orifice plate of 36-, the 5th check valve of 37-, 41- second
Pipeline, the second pressure reducer of 42-, the second filter of 43-, the second pneumatic stopping valve of 44-, 45- second one-way valve, the second orifice plate of 46-；
The 6th check valve of 47-, 51- third pipeline, 52- third pressure reducer, 53- third filter, 54- third pneumatic stopping valve, 55-
Three check valves, 56- third orifice plate；The 7th check valve of 57-, the 4th pipeline of 61-, the 4th pressure reducer of 62-, the 4th filter of 63-,
The 4th pneumatic stopping valve of 64-, the 4th check valve of 65-, the 4th orifice plate of 66-, the 8th check valve of 67-.
Specific embodiment
The contents of the present invention are described in further detail below in conjunction with the drawings and specific embodiments.
During carrying out punching engine ground experiment, air is heated by the way of liquid oxygen and alcohol burn, is based on
The working principle and characteristic of air heating apparatus, the present invention provide a kind of purging system of air heating apparatus and blow down method,
It wherein starts weak blow and realizes air heating apparatus flexibility starting, shutdown, which is blown by force, avoids tempering after the closing of heating device main valve from causing to spray
Infuse device face or nozzle erosion, it is ensured that heating device starts and shutdown is steady.Liquid oxygen supply pipe of the present invention in air heating apparatus
Independent nitrogen blow-off's system is respectively set in road and alcohol supply line, and nitrogen blow-off's system of every kind of medium is by starting and shutting down
Two-way composes in parallel, and completes heating device and removes before ignition with igniting after-blow.
As shown in Figure 1, the purging system of air heating apparatus includes gas cylinder 1, liquid oxygen road starts blowing unit, alcohol road is risen
It shuts down and blows down unit in dynamic unit, alcohol road shutdown blowing unit and the liquid oxygen road of blowing down.Liquid oxygen road starts and blows down unit, alcohol road is risen
It moves and blows down unit, unit is blown down in the shutdown of alcohol road, the import of liquid oxygen road shutdown blowing unit is connect with the outlet of gas cylinder 1；Gas
Bottle 1 quantity it is adjustable, can for one, two, three or more.Liquid oxygen road starts the outlet and liquid oxygen supply line for blowing down unit
Outlet connection, the outlet that alcohol road starts blowing unit are connect with the outlet of alcohol supply line；Alcohol road shutdown blowing unit,
The outlet that unit is blown down in the shutdown of liquid oxygen road is connect with air heating apparatus 3.
Liquid oxygen road starts blowing unit and includes the first pipeline 31 and set gradually from 31 import of the first pipeline to outlet
First pressure reducer 32, first filter 33, the first pneumatic stopping valve 34, the first check valve 35 and the first orifice plate 36, and the first hole
The outlet end of liquid oxygen supply line is arranged in the outlet of plate 36, is additionally provided with the 5th between the first check valve 35 and the first orifice plate 36
Check valve 37.
Alcohol road starts blowing unit and includes the second pipeline 41 and set gradually from 41 import of the second pipeline to outlet
Second pressure reducer 42, the second filter 43, the second pneumatic stopping valve 44, second one-way valve 45 and the second orifice plate 46, and the second hole
The outlet end of alcohol supply line is arranged in the outlet of plate 46, is additionally provided with the 6th between second one-way valve 45 and the second orifice plate 46
Check valve 47.
The shutdown of alcohol road blows down unit and includes third pipeline 51 and set gradually from 51 import of third pipeline to outlet
Third pressure reducer 52, third filter 53, third pneumatic stopping valve 54, third check valve 55 and third orifice plate 56, third is unidirectional
The 7th check valve 57 is additionally provided between valve 55 and third orifice plate 56.
The shutdown of liquid oxygen road blows down unit and includes the 4th pipeline 61 and set gradually from 61 import of the 4th pipeline to outlet
4th pressure reducer 62, the 4th filter 63, the 4th pneumatic stopping valve 64, the 4th check valve 65 and the 4th orifice plate 66, the 4th is unidirectional
The 8th check valve 67 is additionally provided between valve 65 and the 4th orifice plate 66.
As shown in Fig. 2, the exit of gas cylinder 1 is additionally provided with pneumatic panel 2, pneumatic panel 2 uses Regular way of the panel, by valve
It is each attached on pneumatic panel panel with pressure reducer, is remotely controlled to adjust by pressure reducer and guarantee that supply pressure meets test requirements document.
Pneumatic panel 2 includes air-source inflow valve 21, air delivery valve 22, pressure regulation air delivery valve 23, pressure regulation intake valve 24, pressure regulation pressure reducer 25, pressure regulation
Vent valve 26, intake valve 27, the 5th pressure reducer 28, vent valve 29 and deflation collecting pipe 211, pressure regulation intake valve 24, pressure regulation decompression
Device 25 and pressure regulation vent valve 26 are set gradually, and intake valve 27, the 5th pressure reducer 28 and vent valve 29 are set gradually；Air-source inflow valve
21 outlet is connect with pressure regulation intake valve 24, intake valve 27 respectively；It is converged with deflation the outlet of pressure regulation vent valve 26, vent valve 29
Flow tube 211 connects, and the outlet of the 5th pressure reducer 28 is also connect with air delivery valve 22, and the outlet of pressure regulation pressure reducer 25 also passes through tune
Force feed air valve 23 is connect with the control chamber of the 5th pressure reducer 28, and the outlet end of deflation collecting pipe 211 is provided with flange 210.It deflates
211 principal security pressure reducer outlet pressure of collecting pipe meets blowing setting pressure, when pressure reducer outlet pressure is higher than setting pressure,
Can be by deflation pressure release to setting pressure, while after the test, blowing down pipeline cannot be with pressure, by deflating the pressure in pipeline
Power, which is let out, to be removed, and blow-out gas deflation can be expelled to atmosphere by same root deflation collecting pipe 211.
First pipeline 31, the second pipeline 41, third pipeline 51, the 4th pipeline 61 are provided with pressure sensor 4, for real
Shi Guanlu monitors pressure.
First orifice plate 36, the second orifice plate 46, third orifice plate 56, the 4th orifice plate 66 are velocity of sound orifice plate.In engine test
In the process, guarantee that 3 inlet pressure of air heating apparatus and flow meet incoming flow requirement by pressure reducer and the matching of velocity of sound orifice plate, lead to
The parameter balance for crossing engine liquid-gas system calculates, and determines restricting element in system (pressurization orifice plate) size.
During engine thermal testing, since heating by ignition generates thermal walking, in order to ensure equipment and valve working can
By property and safety, generallys use pipeline natural compensation and bellow-type expansion carries out compensation of pipeline.In general, before blowing down solenoid valve
Metal hose is set, and direction is consistent with motor power direction, can increase elbow quantity during circuit design, to realize pipe
The natural compensation on road.First pneumatic stopping valve 34, the second pneumatic stopping valve 44, third pneumatic stopping valve the 54, the 4th pneumatically end
The inlet ductwork of valve 64 uses metal hose.
The present invention also provides a kind of nitrogen blow-off's methods of air heating apparatus, comprising the following steps:
1) certain pressure and flow are passed through to alcohol supply line and liquid oxygen supply line before air heating apparatus igniting
Inert gas realizes the atomization of liquid oxygen and alcohol supplying media in air heating apparatus；
Weak blow with the weak pressure reducer outlet regulating pressure of blowing of alcohol of liquid oxygen is that weak nitrogen flushing air pipe flow resistance and orifice plate enter before lighting a fire
Mouth is weak to blow setting pressure summation.
Liquid oxygen and alcohol nitrogen blow-off flow are to pass through formula before lighting a fireCalculating acquires；
C- orifice flow constant；A- orifice throttle area, m2；P- orifice plate inlet set pressure, MPa；K- nitrogen ratios system
Number K=0.0397；T- temperature, T=283K；G- flow kg/s.
2) nitrogen blow-off is carried out to medium supply system after air heating apparatus shutdown；
It is that strong blowpipe road flow resistance and orifice plate entrance are strong that liquid oxygen, which blows blow pressure reducer outlet regulating pressure by force with alcohol by force, after igniting
Blow setting pressure summation；
Liquid oxygen and alcohol nitrogen blow-off flow are to pass through formula after ignitingCalculating acquires.
C- orifice flow constant；A- orifice throttle area, m2；P- orifice plate inlet set pressure, MPa；K- nitrogen ratios system
Number K=0.0397；T- temperature, T=283K；G- flow kg/s.
Air heating apparatus starts weak blow and refers to before air heating apparatus igniting to alcohol supply line and liquid oxygen supply
Pipeline is passed through the nitrogen of certain pressure and flow, realizes the atomization of liquid oxygen and alcohol supplying media in air heating apparatus, makes it
It is uniformly distributed, it is avoided to be gathered at one, be distributed collection so as to avoid combustion chamber working medium and neutralize air heating apparatus starting moment
Since the possibility of detonation or explosion is concentrated and occurred to energy, it is ensured that air heating apparatus can be according to normal timing flexibility starting.
Since weak blow pressure power is lower than heater chamber pressure after air heating apparatus starting, under the action of check valve, air heating apparatus is just
It is no longer blown down after often starting.
Air heating apparatus shutdown by force blow refer to air heating apparatus shutdown after to medium supply system carry out nitrogen blow-off,
After air heating apparatus medium main valve is closed, still there is residual medium in air heating apparatus ejector filler face.In air heating apparatus room
It presses what is begun to decline sometime to carry out shutdown blowing to air heating apparatus, prevents from causing air heating apparatus to spray due to tempering
Infuse the ablation of device face.
Liquid oxygen/alcohol supply system be all made of start it is weak blow and the nitrogen blow-off's system blown by force of shutting down, which is by height
It presses Nitrogen source gases supplied to pneumatic panel is blown down, ensures that purging system's pressure and flow are full in such a way that pressure reducer and orifice plate combine
Sufficient test requirements document guarantees nitrogen supply (NS) system without fifth wheel using filter, and each road nitrogen blow-off gas is respectively provided with two check valves,
It fundamentally solves medium and flows backward to nitrogen system, it is ensured that heating device combustion chamber chamber pressure is stablized, and medium supply system is improved
Stability and reliability.
Claims (10)
1. a kind of purging system of air heating apparatus, it is characterised in that: started including gas cylinder (1), liquid oxygen road and blow down unit, wine
Smart road starts and blows down unit, unit is blown down in the shutdown of alcohol road and unit is blown down in the shutdown of liquid oxygen road；
The liquid oxygen road starts and blows down unit, alcohol road starts blowing unit, unit is blown down in the shutdown of alcohol road, the shutdown of liquid oxygen road is blown
Except the import of unit is connect with the outlet of gas cylinder (1)；The liquid oxygen road starts the outlet for blowing down unit and liquid oxygen supply line
Outlet connection, the alcohol road, which starts, blows down the outlet of unit and connect with the outlet of alcohol supply line；It closes on the alcohol road
The outlet that machine blows down unit, liquid oxygen road shutdown blowing unit is connect with air heating apparatus (3)；
The liquid oxygen road starts blowing unit and includes the first pipeline (31) and successively set by the first pipeline (31) import to outlet
The first pressure reducer (32), first filter (33), the first pneumatic stopping valve (34), the first check valve (35) and the first orifice plate set
(36)；The alcohol road starts blowing unit and includes the second pipeline (41) and extremely exported successively by the second pipeline (41) import
The second pressure reducer (42), the second filter (43), the second pneumatic stopping valve (44), second one-way valve (45) and the second hole being arranged
Plate (46)；Alcohol road shutdown blow down unit include third pipeline (51) and by third pipeline (51) import to outlet according to
Third pressure reducer (52), third filter (53), third pneumatic stopping valve (54), third check valve (55) and the third of secondary setting
Orifice plate (56)；The liquid oxygen road shutdown blows down unit and includes the 4th pipeline (61) and extremely exported by the 4th pipeline (61) import
The 4th pressure reducer (62), the 4th filter (63), the 4th pneumatic stopping valve (64), the 4th check valve (65) and set gradually
Four orifice plates (66).
2. the purging system of air heating apparatus according to claim 1, it is characterised in that: the pneumatic panel (2) includes
Air-source inflow valve (21), air delivery valve (22), pressure regulation air delivery valve (23), pressure regulation intake valve (24), pressure regulation pressure reducer (25), pressure regulation are put
Air valve (26), intake valve (27), the 5th pressure reducer (28), vent valve (29) and deflation collecting pipe (211)；The pressure regulation intake valve
(24), pressure regulation pressure reducer (25) and pressure regulation vent valve (26) are set gradually, and the intake valve (27), the 5th pressure reducer (28) and are put
Air valve (29) is set gradually；The outlet of the air-source inflow valve (21) is connect with pressure regulation intake valve (24), intake valve (27) respectively；
The outlet of pressure regulation vent valve (26), vent valve (29) is connect with deflation collecting pipe (211), and the 5th pressure reducer (28) go out
Mouth is also connect with air delivery valve (22), and the outlet of pressure regulation pressure reducer (25) also passes through pressure regulation air delivery valve (23) and the 5th pressure reducer (28)
Control chamber connection.
3. the purging system of air heating apparatus according to claim 2, it is characterised in that: first pneumatic stopping valve
(34), the inlet ductwork of the second pneumatic stopping valve (44), third pneumatic stopping valve (54), the 4th pneumatic stopping valve (64) is using gold
Belong to hose.
4. the purging system of air heating apparatus according to claim 3, it is characterised in that: first check valve (35)
And first be additionally provided with the 5th check valve (37) between orifice plate (36)；Between the second one-way valve (45) and the second orifice plate (46)
It is additionally provided with the 6th check valve (47).
5. the purging system of air heating apparatus according to claim 4, it is characterised in that: the third check valve (55)
The 7th check valve (57) is additionally provided between third orifice plate (56).
6. the purging system of air heating apparatus according to any one of claims 1 to 5, it is characterised in that: the described 4th is single
The 8th check valve (67) is additionally provided between valve (65) and the 4th orifice plate (66).
7. the purging system of air heating apparatus according to claim 6, it is characterised in that: first pipeline (31),
Second pipeline (41), third pipeline (51), the 4th pipeline (61) are provided with pressure sensor (4).
8. the purging system of air heating apparatus according to claim 7, it is characterised in that: first orifice plate (36),
Second orifice plate (46), third orifice plate (56), the 4th orifice plate (66) are velocity of sound orifice plate.
9. a kind of blowing method of air heating apparatus, which comprises the following steps:
1) inert gas of certain flow is passed through before air heating apparatus igniting to alcohol supply line and liquid oxygen supply line, it is real
The atomization of liquid oxygen and alcohol supplying media in existing air heating apparatus, flow is to pass through formulaCalculating acquires；
Wherein: C- orifice flow constant；A- orifice throttle area, m2；P- orifice plate inlet set pressure, MPa；K- nitrogen ratios system
Number；T- temperature；G- flow kg/s；
2) after air heating apparatus shutdown, the inert gas for being passed through certain flow to air heating apparatus is purged, and flow is logical
Cross formulaCalculating acquires.
10. the blowing method of air heating apparatus according to claim 9, it is characterised in that: in step 1), K=
0.0397, T=283K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811499766.3A CN109724805B (en) | 2018-12-09 | 2018-12-09 | Blowing system and blowing method of air heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811499766.3A CN109724805B (en) | 2018-12-09 | 2018-12-09 | Blowing system and blowing method of air heating device |
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| Publication Number | Publication Date |
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| CN109724805A true CN109724805A (en) | 2019-05-07 |
| CN109724805B CN109724805B (en) | 2020-11-10 |
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ID=66295907
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811499766.3A Active CN109724805B (en) | 2018-12-09 | 2018-12-09 | Blowing system and blowing method of air heating device |
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| CN (1) | CN109724805B (en) |
Cited By (3)
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| CN111076910A (en) * | 2019-12-18 | 2020-04-28 | 西安航天动力研究所 | Test system and test method for checking nozzle brazing qualification |
| CN113606067A (en) * | 2021-07-28 | 2021-11-05 | 西安航天动力试验技术研究所 | High-precision supply system and method for low-temperature incoming flow working medium |
| CN115325438A (en) * | 2022-07-22 | 2022-11-11 | 北京航天试验技术研究所 | Liquid hydrogen temperature raising device and control method thereof |
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| CN115325438A (en) * | 2022-07-22 | 2022-11-11 | 北京航天试验技术研究所 | Liquid hydrogen temperature raising device and control method thereof |
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| Publication number | Publication date |
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| CN109724805B (en) | 2020-11-10 |
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