CN104748968A - Polluting experiment gas adding device - Google Patents
Polluting experiment gas adding device Download PDFInfo
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- CN104748968A CN104748968A CN201510152732.7A CN201510152732A CN104748968A CN 104748968 A CN104748968 A CN 104748968A CN 201510152732 A CN201510152732 A CN 201510152732A CN 104748968 A CN104748968 A CN 104748968A
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- mixer
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- carbon dioxide
- gas
- venturi tube
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Abstract
The invention discloses a polluting experiment gas adding device which is used for simulating outlet parameters of polluting air heating equipment on a pure air heater by adding polluting components for performing performance comparison experiments of a pure air and polluting air scramjet engine. Polluting gas is added behind the pure air heater, so that damage, to the heater, by polluting air can be reduced effectively, and experiment cost is lowered; mixing can be enhanced effectively by a mixer which is added, so that an experiment simulated inlet flow field is enabled to be more uniform. By the polluting experiment gas adding device, the problem of generation of polluting experiment gas like heating and supplying of water, adding of carbon dioxide, replenishing of oxygen and effective mixing of gases is solved; gas flow of each part is controlled accurately, so that influence caused by submerging pollution effect is avoided; filling time sequence of each gas component can be controlled accurately in the process of use, and expected flow field parameters are created.
Description
Technical field
The present invention relates to scramjet engine experimental technique field, specifically, relate to a kind of test for contamination gas adding set.
Background technology
In the test of ground punching engine, the test gas requiring wind-tunnel facilities to provide reaches certain Mach number, temperature, pressure, makes it to be close with the state of flight under full-scale condition as much as possible.Combustion heating wind-tunnel is built and operating cost is cheap, technical risk is little, output ratio is high, working range is broad, long operational time, function changeability are strong advantage and be subject to widespread use in scramjet engine ground experiment due to it.But this type of heating unexistent or component that content is very few under introducing some Live Flying conditions in test gas, i.e. " pollution components ", as H
2o and CO
2deng, the component of test gas, molal weight, specific heat, specific heat ratio series of properties and parameter is caused to change, be not quite similar with the free stream parameter under Live Flying condition, and then the impact of corresponding physics and chemistry is produced on the performance of engine in ground experiment, i.e. " polluting effect ".Research pollution components needs to possess pure air and contaminated air firing equipment when affecting Investigation of Scramjet Engine Performance simultaneously, and the firing equipment cost of scramjet engine is higher, and not easy care.
Describe University of Virginia's dusty gas that equipment uses at the trial in document " Test Gas Vitiation Effects in a Dual-Mode Scramjet Combustor [J] .Journal of Propulsion and Power; Vol.23 (3), July-August 2007. " and add measure; In the dusty gas interpolation measure that University of Virginia uses, O in pollution components
2and CO
2be joined before primary air heating, well heater oxidation, aging quickening can be caused, reduce the serviceable life of well heater, increase experimentation cost.
Summary of the invention
In order to avoid the deficiency that prior art exists, the present invention proposes a kind of test for contamination gas adding set, and this device in use well can add precision by Control pollution gas, reduces the damage to well heater in process of the test, reduces experimentation cost.
The technical solution adopted for the present invention to solve the technical problems is: comprise water vapor add-on system, carbon dioxide add-on system, oxygen add-on system, mixer, mixer is provided with primary air import, water vapor adds import, carbon dioxide adds import, oxygen adds import, mixer outlet, on mixer, each interpolation inflow point is evenly equipped with 5 diameters is the airflow hole of 2mm, and there are mixer pressure sensor and mixer temperature sensor in mixer outlet position; The water piston cylinder of water vapor add-on system coordinates with well heater, makes water vapor enter mixer by Venturi tube, is provided with pressure transducer and thermopair between well heater and Venturi tube; Carbon dioxide add-on system extrudes by the high pressure gas of the first Nitrogen source gases the carbon dioxide be stored in preheating piston cylinder, enters mixer through Venturi tube; Oxygen in oxygen add-on system through decompressor, retaining valve, Venturi tube enters mixer, and controlling oxygen mole fraction in the gas entering in mixer by decompressor, pressure transducer is 21%; Pollute addO-on therapy and pure air Homogeneous phase mixing in mixer, enter test model by jet pipe; Concrete steps are as follows:
Step 1. carries out preheating to the preheating piston cylinder in the well heater in water vapor add-on system and carbon dioxide add-on system respectively, wherein well heater is heated to 500 DEG C, preheating piston cylinder is heated to 70 DEG C, water and carbon dioxide is filled in corresponding piston cylinder after reaching temperature;
Step 2. calculates required water vapor and carbon dioxide addition according to trystate, choose the Venturi tube in each add-on system, draw the expulsion pressure before Venturi tube in each add-on system, before regulating the pressure of decompressor in each add-on system to make Venturi tube, expulsion pressure reaches requirement;
Step 3. sequential is arranged, and carries out sequential setting to water, carbon dioxide, oxygen, ensures the expulsion pressure needed for setting up before Venturi tube in each add-on system at the trial;
After step 4. off-test, bleed off the gas in each system pipeline.
Beneficial effect
A kind of test for contamination gas adding set that the present invention proposes, for adding dusty gas after pure air well heater, effectively can reduce the damage that contaminated air causes well heater, reduce experimentation cost, and the mixer increased effectively can strengthen mixing, makes test simulation inlet flow field more even.
Test for contamination gas adding set of the present invention solves the generation of test for contamination gas, comprises heating and supply, the interpolation of carbon dioxide and the filling into of oxygen of water, and effective mixing of each gas; Each several part gas flow accurately controls, and avoids the impact of flooding " polluting effect "; Control the filling sequential of each gas composition accurately, establish the flow field parameter of expection.
Table 1 lists the provision parameter of test for contamination gas adding set each several part gas, meets water vapor pollution components mole fraction 3.5% ~ 30% well, the contaminated air incoming flow test in carbon dioxide pollution component molar mark 3% ~ 10% scope.
Table 1
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, a kind of test for contamination gas of the present invention adding set is described in further detail.
Fig. 1 is oxygen add-on system schematic diagram.
Fig. 2 is carbon dioxide add-on system schematic diagram.
Fig. 3 is water vapor add-on system schematic diagram.
Fig. 4 is mixer schematic diagram.
In figure:
1) oxygen gas source (2) the first filter (3) the first electromagnetic valve 4. The first pressure reducer 5. The first stop valve 6. Check valve 7. The second solenoid valve 8. The first pressure sensor 9. The first article's tube 10. The nitrogen gas source 11. The second filter 12. The third solenoid valve 13. The second pressure reducer 14. The second cut-off valve 15. Preheat the piston cylinder 16. The fourth solenoid valve 17. 18 second pressure sensor. The second venturi 19. The second nitrogen gas source, the third filter 21. Electromagnetic valve 22. 5 third pressure reducer 23. 24. The third stop valve solenoid valve 25. 6. Piston cylinder 26 water heater 27 28. The third pressure sensor thermocouple 29 third venturi 30. 31. The main air inlet steam add imported 32. Carbon dioxide add import 33. Oxygen adding import 34 mixer 35 mixer pressure sensor 36 mixer temperature sensor with a mixer for export
Embodiment
The present embodiment is a kind of test for contamination gas adding set.
Consult Fig. 1 ~ Fig. 4, test for contamination gas adding set is made up of water vapor add-on system, carbon dioxide add-on system, oxygen add-on system, mixer; Mixer body is provided with primary air import 30, water vapor adds import 31, carbon dioxide adds import 32, oxygen adds import 33, mixer outlet 37, on mixer, each interpolation inflow point is evenly equipped with 5 diameters is the airflow hole of 2mm, and there are mixer pressure sensor 35 and mixer temperature sensor 36 in mixer outlet position.
Oxygen source 1 in oxygen add-on system is added import 33 with the oxygen of mixer and is connected by pipeline, connecting line is provided with the first filtrator 2, first solenoid valve 3, first decompressor 4, first stop valve 5, retaining valve 6, second solenoid valve 7, first pressure transducer 8, first Venturi tube 9, in oxygen add-on system, pipeline all adopts copper material.Oxygen is through the first decompressor 4, and retaining valve 6, the first Venturi tube 9 enters mixer 34, and controlling to enter oxygen mole fraction in the gas in mixer by the first decompressor 4, first pressure transducer 8 is 21%.
The first Nitrogen source gases 10 in carbon dioxide add-on system is added import 32 with the carbon dioxide of mixer 34 and is connected by pipeline, connecting line is connected with the second filtrator 11, the 3rd solenoid valve 12, second decompressor 13, second stop valve 14, preheating piston cylinder 15, the 4th solenoid valve 16, second pressure transducer 17, second Venturi tube 18 in turn; The high pressure gas of the first Nitrogen source gases 10 extrudes the carbon dioxide be stored in preheating piston cylinder 15, enters mixer 34 through the second Venturi tube 18, controls carbon dioxide flow by the second pressure transducer 17.
The second Nitrogen source gases 19 in water vapor add-on system is added import 31 with the water vapor of mixer and is connected by pipeline, connecting line is provided with the 3rd filtrator 20, the 5th solenoid valve 21, the 3rd decompressor 22, the 3rd stop valve 23, the 6th solenoid valve 24, water piston cylinder 25, well heater 26, the 3rd pressure transducer 27, thermopair 28, the 3rd Venturi tube 29; The high pressure gas extruding pure water of the second Nitrogen source gases 19, the well heater 26 that pure water can reach 750 DEG C by maximum temperature is heated into water vapor, mixer 34 is entered through the 3rd Venturi tube 29, be provided with the 3rd pressure transducer 27 and thermopair 28 between 3rd Venturi tube 29 and well heater 26, controlled the interpolation flow of water vapor by the 3rd pressure transducer 27 and thermopair 28.
Pollute addO-on therapy and pure air Homogeneous phase mixing in mixer 34, enter test model by jet pipe.First the addition of pure air and each pollution components is calculated according to trystate, well heater 26 in water vapor add-on system and carbon dioxide add-on system and preheating piston cylinder 15 are heated, ensure that water vapor and carbon dioxide can not liquefies at the venturi through the second Venturi tube 18 and the 3rd Venturi tube 29, and respectively 500 DEG C and 70 DEG C are heated to well heater 26 and preheating piston cylinder 15.Water becomes water vapor through well heater 26 and enters mixer through Venturi tube, unstable during beginning, pressure required before setting up Venturi tube needs the time of 15s, carbon dioxide needs the time of 3s, oxygen needs the time of 4s, finally regulate each pollution add-on system flow to required requirement, during on-test, open the electromagnetic valve switch of each system.To add vapor flow 20g/s, carbon dioxide flow 48g/s, oxygen flow 20g/s are that example implementation step is as follows:
The first step. connect water vapor add-on system, carbon dioxide add-on system, oxygen add-on system, mixer, wherein in oxygen add-on system, each parts adopt the part of band explosion precaution, and pipeline takes copper material.In water vapor add-on system, well heater and mixer linkage section take heat-preservation cotton to wrap up, and prevent cooling too fast;
Second step. 500 DEG C and 70 DEG C are heated to respectively to the well heater 26 in water vapor add-on system and carbon dioxide add-on system and preheating piston cylinder 15, after reaching temperature, stop heating, and water and carbon dioxide injection in the cylinder body of correspondence;
3rd step. according to system debug data, in water vapor add-on system, the Venturi tube that throat diameter is 3mm chosen by the 3rd Venturi tube 29, and after the 3rd decompressor 22 reduces pressure, pressure is 2.4Mpa; In carbon dioxide add-on system, the Venturi tube that throat diameter is 2mm chosen by the second Venturi tube 18, and after the second decompressor 13 reduces pressure, pressure is 4.3Mpa; In oxygen add-on system, the Venturi tube that throat diameter is 1.5mm chosen by the first Venturi tube 9, and after the first decompressor 8 reduces pressure, pressure is 4.4mpa;
4th step. open time sequence control device, with time on-test for 20s ~ 30s arranges the 6th solenoid valve 24 sequential respectively for 5s ~ 30s, the 4th solenoid valve 16 sequential is 17s ~ 30s, and the second solenoid valve 7 sequential is 16s ~ 30s;
5th step. during on-test, when primary air import 30 condition reaches trystate, open sequential, after off-test, bleed off the residual gas in each pipeline.
Claims (1)
1. a test for contamination gas adding set, it is characterized in that: comprise water vapor add-on system, carbon dioxide add-on system, oxygen add-on system, mixer, mixer is provided with primary air import, water vapor adds import, carbon dioxide adds import, oxygen adds import, mixer outlet, on mixer, each interpolation inflow point is evenly equipped with 5 diameters is the airflow hole of 2mm, and there are mixer pressure sensor and mixer temperature sensor in mixer outlet position; The water piston cylinder of water vapor add-on system coordinates with well heater, makes water vapor enter mixer by Venturi tube, is provided with pressure transducer and thermopair between well heater and Venturi tube; Carbon dioxide add-on system extrudes by the high pressure gas of the first Nitrogen source gases the carbon dioxide be stored in preheating piston cylinder, enters mixer through Venturi tube; Oxygen in oxygen add-on system through decompressor, retaining valve, Venturi tube enters mixer, and controlling oxygen mole fraction in the gas entering in mixer by decompressor, pressure transducer is 21%; Pollute addO-on therapy and pure air Homogeneous phase mixing in mixer, enter test model by jet pipe; Concrete steps are as follows:
Step 1. carries out preheating to the preheating piston cylinder in the well heater in water vapor add-on system and carbon dioxide add-on system respectively, wherein well heater is heated to 500 DEG C, preheating piston cylinder is heated to 70 DEG C, water and carbon dioxide is filled in corresponding piston cylinder after reaching temperature;
Step 2. calculates required water vapor and carbon dioxide addition according to trystate, choose the Venturi tube in each add-on system, draw the expulsion pressure before Venturi tube in each add-on system, before regulating the pressure of decompressor in each add-on system to make Venturi tube, expulsion pressure reaches requirement;
Step 3. sequential is arranged, and carries out sequential setting to water, carbon dioxide, oxygen, ensures the expulsion pressure needed for setting up before Venturi tube in each add-on system at the trial;
After step 4. off-test, bleed off the gas in each system pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510152732.7A CN104748968A (en) | 2015-04-01 | 2015-04-01 | Polluting experiment gas adding device |
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| CN201510152732.7A CN104748968A (en) | 2015-04-01 | 2015-04-01 | Polluting experiment gas adding device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343733A (en) * | 2020-10-30 | 2021-02-09 | 西安航天动力试验技术研究所 | High-temperature air generation system, precooling combined engine ground test device and method |
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2015
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| CN1168713A (en) * | 1994-10-19 | 1997-12-24 | 安德烈·德茹 | Device for injecting a fuel gas mixture into a combustion engine |
| EP0939210A2 (en) * | 1998-02-27 | 1999-09-01 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine having combustion heater |
| EP1417997A1 (en) * | 2002-11-07 | 2004-05-12 | Renault s.a.s. | Catalytic depollution process for motor vehicle engine and associated process for hydrogen production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343733A (en) * | 2020-10-30 | 2021-02-09 | 西安航天动力试验技术研究所 | High-temperature air generation system, precooling combined engine ground test device and method |
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Application publication date: 20150701 |