CN105509929A - Backflow type high temperature hot wind tunnel structure - Google Patents
Backflow type high temperature hot wind tunnel structure Download PDFInfo
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- CN105509929A CN105509929A CN201510968009.6A CN201510968009A CN105509929A CN 105509929 A CN105509929 A CN 105509929A CN 201510968009 A CN201510968009 A CN 201510968009A CN 105509929 A CN105509929 A CN 105509929A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/005—Calibration
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention belongs to the calibration field of a temperature sensor, and relates to a backflow type high temperature hot wind tunnel structure for calibrating the temperature sensor. The backflow type high temperature hot wind tunnel structure includes an air compressor (1), an air storage tank (2), a control valve (3), a first convergence section (4), a mixing section (5), a diffusion section (6), a heating section (7), a second convergence section (8), and a test section (9). The backflow type high temperature hot wind tunnel structure is characterized by comprising a jet injection section (10), a semicircle section (11), and a backflow section (13). The backflow type high temperature hot wind tunnel structure for calibrating the temperature sensor greatly improves the uniformity of a temperature field, decreases the dispersibility of calibration data, reduces the energy consumption and the calibration cost, and is suitable for static state metering detection.
Description
Technical field
The invention belongs to temperature sensor calibration field, relate to a kind of reverse-flow type high-temperature hot construction of wind tunnel for base measuring temperature sensor.
Background technology
It is the important support technology guaranteeing to test acquisition data validity, accuracy for thermometric pick up calibration.In current heat measurement, temperature sensor can form comparatively stationary temperature field by oil groove or salt bath and realize calibration.Under normal circumstances, the highest base measuring temperature of oil groove is no more than 300 DEG C, and the highest base measuring temperature of salt bath is no more than 500 DEG C.Calibration under higher temperature is carried out usually in well formula or tubular furnace, and this kind of stove mostly is the pyroelecthc properties of calibration thermo wires and designs, and therefore how narrow and small burner hearth is, and constant temperature zone is narrow.Special-shaped temperature sensor is usually because its temperature-sensitive pole section cannot be placed in the flat-temperature zone of burner hearth and cannot complete calibration.Domestic-developed adopts direct-action wind tunnel it to be carried out to the hot air wind tunnel of dynamic calibration, and Problems existing is: the first, temperature field is uneven, the dispersiveness of calibration data is larger; The second, energy consumption is large, and calibration cost is high; Three, static weighing calibrating is unsuitable for.
Summary of the invention
The object of the invention is: propose a kind of reverse-flow type high-temperature hot construction of wind tunnel for base measuring temperature sensor, to improve the homogeneity in temperature field, reduce the dispersiveness of calibration data; Reduce energy consumption and calibration cost; Be suitable for static weighing calibrating.
Technical scheme of the present invention is: a kind of reverse-flow type high-temperature hot construction of wind tunnel, comprises air compressor 1, gas-holder 2, operation valve 3, first converging portion 4, mixing section 5, diffuser 6, bringing-up section 7, second converging portion 8 and test section 9; The gas outlet of air compressor 1 is communicated with the air intake opening of gas-holder 2, the gas outlet of gas-holder 2 is by pipeline and operation valve 3 inlet communication, the gas outlet of the first converging portion 4 is communicated with the air intake opening of mixing section 5, the gas outlet of mixing section 5 is communicated with the air intake opening of diffuser 6, the gas outlet of bringing-up section 7 is communicated with the air intake opening of the second converging portion 8, and the gas outlet of the second converging portion 8 is communicated with the air intake opening of test section 9; It is characterized in that: have jet injection section 10, semicircle segmental arc 11 and a reflux section 13; The outlet of operation valve 3 is communicated with the thrower import 10a of jet injection section 10 by pipeline, the gas outlet 10c of jet injection section 10 is communicated with the air intake opening of the first converging portion 4, the air intake opening of semicircle segmental arc 11 is communicated with the gas outlet of diffuser 6, the gas outlet of semicircle segmental arc 11 is communicated with the air intake opening of bringing-up section 7, the air intake opening of reflux section 13 is communicated with the gas outlet of test section 9, the gas outlet of reflux section 13 is communicated with the suction inlet 10b of jet injection section 10, and reflux section 13 has the gas outlet 14 be communicated with air.
Advantage of the present invention is: propose a kind of reverse-flow type high-temperature hot construction of wind tunnel for base measuring temperature sensor, substantially increase the homogeneity in temperature field, reduce the dispersiveness of calibration data; Reduce energy consumption and calibration cost; Be suitable for static weighing calibrating.
Accompanying drawing explanation
Fig. 1 is structural principle block diagram of the present invention.
Embodiment
Below the present invention is described in further details.See Fig. 1, a kind of reverse-flow type high-temperature hot construction of wind tunnel, comprises air compressor 1, gas-holder 2, operation valve 3, first converging portion 4, mixing section 5, diffuser 6, bringing-up section 7, second converging portion 8 and test section 9; The gas outlet of air compressor 1 is communicated with the air intake opening of gas-holder 2, the gas outlet of gas-holder 2 is by pipeline and operation valve 3 inlet communication, the gas outlet of the first converging portion 4 is communicated with the air intake opening of mixing section 5, the gas outlet of mixing section 5 is communicated with the air intake opening of diffuser 6, the gas outlet of bringing-up section 7 is communicated with the air intake opening of the second converging portion 8, and the gas outlet of the second converging portion 8 is communicated with the air intake opening of test section 9; It is characterized in that: have jet injection section 10, semicircle segmental arc 11 and a reflux section 13; The outlet of operation valve 3 is communicated with the thrower import 10a of jet injection section 10 by pipeline, the gas outlet 10c of jet injection section 10 is communicated with the air intake opening of the first converging portion 4, the air intake opening of semicircle segmental arc 11 is communicated with the gas outlet of diffuser 6, the gas outlet of semicircle segmental arc 11 is communicated with the air intake opening of bringing-up section 7, the air intake opening of reflux section 13 is communicated with the gas outlet of test section 9, the gas outlet of reflux section 13 is communicated with the suction inlet 10b of jet injection section 10, and reflux section 13 has the gas outlet 14 be communicated with air.
In order to improve the homogeneity in temperature field further, there is a temperature balancer 12, it is connected to form by the convergence oared segrne pii of leading portion and the pipe section of rear end, cyclone is had in the front end of pipe section, temperature balancer 12 is positioned at the second converging portion 8 and test section 9, the convergence oared segrne pii of temperature balancer 12 is positioned at the air intake opening place of the second converging portion 8, and the pipe section of temperature balancer 12 is positioned at before test section 9, test model.
Principle of work of the present invention is: the present invention's application reverse-flow type hot air wind tunnel structure, realizes recycling by heated air stream heat energy.Circulating current is progressively heated up by electric heater, by adding the measure that warm field optimized by distance piece, cyclone etc. in hot air wind tunnel contraction section and test section, and then forms the constant temperature field of test temperature sensor calibration needs.Circulation progressively heats up and reduces the power of well heater, thus reduce the volume of hot air wind tunnel and take up an area space, because than the disposable heating mode of single flow hot air wind tunnel, heating distance (that is heater length) of reverse-flow type hot air wind tunnel well heater is much smaller, so both reduce the construction cost of well heater, also reduce the entire length of hot air wind tunnel.The reduction of electric heater capacity, also greatly reduces the operating cost of hot air wind tunnel.
The present invention forms the air supply system of reverse-flow type hot air wind tunnel with air compressor and gas-holder, and air compressor is stored in gas-holder by after air compressing to certain pressure, as the source of the gas that hot air wind tunnel is run.The volume of gas storage tank that air compressor carries is little, if by the direct air feed of air compressor when hot air wind tunnel is run, pressure surge is large, thus causes hot air wind tunnel flow velocity unstable, causes electric heater capacity to fluctuate large, thus is unfavorable for that hot air wind tunnel stablizes the realization of warm field.After increasing gas-holder, in hot air wind tunnel operational process, the pressure stability in gas-holder, thus the flow velocity of hot air wind tunnel is also stablized.
The power that the present invention runs using thrower as hot air wind tunnel, conventional low speed normal temperature wind-tunnel is usually using the fan forced power system as wind-tunnel of driven by motor, hot air wind tunnel according to the type of drive of normal temperature wind-tunnel, fan selection will be brought difficult and expensive, universal driving shaft cooling is difficult, sealing between universal driving shaft and hole body the and lubricate technical barriers such as difficulty.In the design, application sprayers supercharging mode, as the operation power of hot air wind tunnel, has evaded above technical barrier.Jet pipe in emitter construction passes into the air through air compressor compression, spray the temperature of gas flow temperature far below the outer air-flow of pipe of Bottomhole pressure, and flow is much larger than skimming over the flow of managing outer air-flow in operational process.In such pipe, air-flow serves the effect of cooling spray pipe in operational process, avoids jet pipe to deform in hot air wind tunnel operational process, to guarantee the stable of nozzle location, thus the stable operation of maintaining heat wind-tunnel.
Electric heater plays heated air stream.Due to the backflow effect of return circuit wind tunnel, before gas flow temperature is stable, the gas flow temperature at every turn entering electric heater is different, and temperature raises gradually, this also reaches and air-flow will be kept to reduce electric heater capacity when a certain temperature spot stable operation, reduce the object of electric heater length, both saved construction cost, and also greatly reduced operating cost.In the present invention, electric heater structure adopts and is uniformly distributed, and heating tube is parallel to air motion direction, plunders the version of heating tube outside air-flow.Such electric heater not only serves the effect of heated air stream, also reaches the effect that straight air-flow is led in combing flow field namely.
Distance piece is used for collecting the high-temperature gas flowed out in the middle part of well heater, and to reduce the thermograde of flowing gas in distance piece, cyclone, for strengthening the mixing intensity of air flow in distance piece, makes its temperature more even.
One embodiment of the present of invention, air compressor 1, gas-holder 2, operation valve 3, bringing-up section 7 and temperature balancer 12 all adopt finished parts.Prove through test, the homogeneity in this embodiment temperature field improves more than 30%.
Claims (2)
1. a reverse-flow type high-temperature hot construction of wind tunnel, comprises air compressor (1), gas-holder (2), operation valve (3), the first converging portion (4), mixing section (5), diffuser (6), bringing-up section (7), the second converging portion (8) and test section (9), the gas outlet of air compressor (1) is communicated with the air intake opening of gas-holder (2), the gas outlet of gas-holder (2) is by pipeline and operation valve (3) inlet communication, the gas outlet of the first converging portion (4) is communicated with the air intake opening of mixing section (5), the gas outlet of mixing section (5) is communicated with the air intake opening of diffuser (6), the gas outlet of bringing-up section (7) is communicated with the air intake opening of the second converging portion (8), and the gas outlet of the second converging portion (8) is communicated with the air intake opening of test section (9), it is characterized in that: have a jet injection section (10), semicircle segmental arc (11) and reflux section (13), the outlet of operation valve (3) is communicated with the thrower import (10a) of jet injection section (10) by pipeline, the gas outlet (10c) of jet injection section (10) is communicated with the air intake opening of the first converging portion (4), the air intake opening of semicircle segmental arc (11) is communicated with the gas outlet of diffuser (6), the gas outlet of semicircle segmental arc (11) is communicated with the air intake opening of bringing-up section (7), the air intake opening of reflux section (13) is communicated with the gas outlet of test section (9), the gas outlet of reflux section (13) is communicated with the suction inlet (10b) of jet injection section (10), reflux section (13) has the gas outlet (14) be communicated with air.
2. reverse-flow type high-temperature hot construction of wind tunnel according to claim 1, it is characterized in that: have a temperature balancer (12), it is connected to form by the convergence oared segrne pii of leading portion and the pipe section of rear end, cyclone is had in the front end of pipe section, temperature balancer (12) is positioned at the second converging portion (8) and test section (9), the convergence oared segrne pii of temperature balancer (12) is positioned at the air intake opening place of the second converging portion (8), and the pipe section of temperature balancer (12) is positioned at before test section (9), test model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510968009.6A CN105509929B (en) | 2015-12-21 | 2015-12-21 | A kind of reverse-flow type high-temperature hot-air hole structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510968009.6A CN105509929B (en) | 2015-12-21 | 2015-12-21 | A kind of reverse-flow type high-temperature hot-air hole structure |
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| Publication Number | Publication Date |
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| CN105509929A true CN105509929A (en) | 2016-04-20 |
| CN105509929B CN105509929B (en) | 2017-11-24 |
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| CN201510968009.6A Active CN105509929B (en) | 2015-12-21 | 2015-12-21 | A kind of reverse-flow type high-temperature hot-air hole structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106746A (en) * | 2017-12-06 | 2018-06-01 | 西北工业大学 | The temperature survey of continuous wind tunnel cooling system and data collecting system |
| CN109186815A (en) * | 2018-10-31 | 2019-01-11 | 北京航空航天大学 | A kind of low temperature High Mach number detecting probe temperature calibration device |
Citations (5)
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| JP2003042858A (en) * | 2001-07-30 | 2003-02-13 | Natl Space Development Agency Of Japan | Apparatus and method for dynamic calibration of temperature sensor |
| US20030111615A1 (en) * | 2001-12-17 | 2003-06-19 | Benne Michael E. | Method and apparatus to correct for the temperature sensitivity of pressure sensitive paint |
| CN201340333Y (en) * | 2008-12-31 | 2009-11-04 | 浙江理工大学 | Return flow tunnel testing device |
| CN203053672U (en) * | 2012-12-12 | 2013-07-10 | 马剑龙 | Wind tunnel for reflux type experiments |
| CN103541924A (en) * | 2013-10-24 | 2014-01-29 | 浙江理工大学 | Automatic test system of axial flow fans |
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2015
- 2015-12-21 CN CN201510968009.6A patent/CN105509929B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003042858A (en) * | 2001-07-30 | 2003-02-13 | Natl Space Development Agency Of Japan | Apparatus and method for dynamic calibration of temperature sensor |
| US20030111615A1 (en) * | 2001-12-17 | 2003-06-19 | Benne Michael E. | Method and apparatus to correct for the temperature sensitivity of pressure sensitive paint |
| CN201340333Y (en) * | 2008-12-31 | 2009-11-04 | 浙江理工大学 | Return flow tunnel testing device |
| CN203053672U (en) * | 2012-12-12 | 2013-07-10 | 马剑龙 | Wind tunnel for reflux type experiments |
| CN103541924A (en) * | 2013-10-24 | 2014-01-29 | 浙江理工大学 | Automatic test system of axial flow fans |
Non-Patent Citations (2)
| Title |
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| 李海燕等: ""温度传感器动态校准研究"", 《计测技术》 * |
| 赵时安: ""温度传感器辐射修正校准的准确性研究"", 《计测技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106746A (en) * | 2017-12-06 | 2018-06-01 | 西北工业大学 | The temperature survey of continuous wind tunnel cooling system and data collecting system |
| CN108106746B (en) * | 2017-12-06 | 2019-08-13 | 西北工业大学 | The temperature of continuous wind tunnel cooling system measures and data collection system |
| CN109186815A (en) * | 2018-10-31 | 2019-01-11 | 北京航空航天大学 | A kind of low temperature High Mach number detecting probe temperature calibration device |
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| Publication number | Publication date |
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| CN105509929B (en) | 2017-11-24 |
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Address after: 610500 Xindu Xuefu Road, Xindu District, Chengdu, Sichuan Patentee after: AECC SICHUAN GAS TURBINE Research Institute Address before: 621703 P.O. Box 305, Jiangyou City, Mianyang City, Sichuan Province Patentee before: CHINA GAS TURBINE EST |