CN102621907B - Constant temperature wind tunnel control system - Google Patents
Constant temperature wind tunnel control system Download PDFInfo
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- CN102621907B CN102621907B CN2012100909049A CN201210090904A CN102621907B CN 102621907 B CN102621907 B CN 102621907B CN 2012100909049 A CN2012100909049 A CN 2012100909049A CN 201210090904 A CN201210090904 A CN 201210090904A CN 102621907 B CN102621907 B CN 102621907B
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Abstract
The invention discloses a constant temperature wind tunnel control system, which comprises fans, a wind tunnel, a constant temperature airflow chute, a multipoint temperature measurement system and a computer control system. The wind tunnel comprises a cold air ventilation pipeline and a hot air ventilation pipeline. Air inlets of the cold air ventilation pipeline and the hot air ventilation pipeline are communicated with air outlets of heat exchange tubes in the constant temperature airflow chute respectively. The constant temperature airflow chute comprises tanks for generating a hot airflow and a cold airflow respectively. The heat exchange tubes for generating a hot airflow and a cold airflow are arranged in the tanks respectively. Air inlets of the heat exchange tubes are communicated with air outlets of the fans respectively. Temperature in each of the tanks, the cold air ventilation pipeline and the hot air ventilation pipeline is detected by the multipoint temperature measurement system. The frequency of each fan, the temperature in each of the tanks, the cold air ventilation pipeline and the hot air ventilation pipeline, and the multipoint temperature measurement system are controlled by the computer control system respectively. Velocity-controllable airflows can be obtained, and two airflows with constant temperatures and a constant temperature difference can also be obtained, so that the working range of the wind tunnel is expanded, and the system plays a more important role in instrument detection and researches.
Description
Technical field
Relate to aerodynamics field and metering engineering field, be specifically related to a kind ofly adopt suitable propulsion system to exist
Produce the constant temperature wind-tunnel control system of the artificial airflow of temperature constant in wind-tunnel.
Background technology
Wind-tunnel, refer to drive the controlled air-flow of one speed with power-equipment in a pipeline, in order to model is carried out a kind of equipment of aerodynamic experiment.Along with the development of industrial aerodynamics, wind-tunnel also obtains applying more and more widely in the departments such as communications and transportation, building construction, instrument detection, Wind Power Utilization and environmental protection.
Due to the heating of the power drive device of wind-tunnel itself and the unevenness of outside air, the air-flow that at present nearly all wind-tunnel produces is tightly the controlled air-flow of speed, and the temperature of air-flow is also non-constant.In actual applications, not only the speed controllable temperature is also constant particularly to require air-flow that wind-tunnel produces in the detection of specific apparatus, sometimes more two strands of constant air-flows of speed controllable temperature of demand generation have the constant air-flow of temperature difference with formation, and for example the detection of temperature fluctuation just needs two strands of poor constant air-flows of speed controllable temperature.
Summary of the invention
The objective of the invention is in order to make up the deficiency of prior art, a kind of constant temperature wind-tunnel control system is provided, its simple in structure, easy operation, not only can obtain the controlled air-flow of speed, can also obtain two bursts of temperature constant and the constant air-flow of temperature difference, due contribution is made in detection and the research of new instrument and specific apparatus.
The present invention is achieved through the following technical solutions:
a kind of constant temperature wind-tunnel control system, include blower fan, wind-tunnel, the constant temperature airslide, multipoint temperature measuring system and computer control system, it is characterized in that: described wind-tunnel includes cold air ventilating duct and hot gas ventilating duct, the air inlet of described cold air ventilating duct and hot gas ventilating duct is communicated to respectively the gas outlet of heat-exchange tube in the constant temperature airslide, described constant temperature airslide includes the casing that produces thermal current and cold airflow, be respectively equipped with the heat-exchange tube that produces thermal current and cold airflow in described casing, the two ends of described heat-exchange tube are stretched out respectively outside casing, the air intake opening of described heat-exchange tube is connected with the air outlet of blower fan respectively, temperature in described casing, cold air ventilating duct and hot gas ventilating duct detects by the multipoint temperature measuring system respectively, and the frequency of blower fan, temperature and multipoint temperature measuring system in temperature in casing, cold air ventilating duct and hot gas ventilating duct are controlled by computer control system respectively.
Described wind-tunnel is comprised of symmetrical side by side cold air ventilating duct and hot gas ventilating duct, described cold air ventilating duct and hot gas ventilating duct are by being linked in sequence and forming successively by air inlet collection tube, stabilized contraction pipe, experiment tube, anemostat, fan interface pipe, axial flow blower and the second collapsible tube respectively, in the mouth of pipe of the link of described air inlet collection tube and stabilized contraction pipe, honeycomb is installed, the developmental tube of described cold air ventilating duct and hot gas draft tube is integrated and centre is provided with dividing plate.
Described air inlet collection tube is tapered tube, air intake opening is small end, described stabilized contraction pipe is comprised of cylindrical tube and tapered tube transition, and its small end is communicated with experiment tube, and described experiment tube is straight tube, described anemostat is inclined tube, described fan interface pipe is reduced pipe, and its small end is communicated with anemostat, and its large end is equipped with axial flow blower, described the second collapsible tube is tapered tube, and its small end is gas outlet.
Described constant temperature airslide is comprised of two casings that independently produce thermal current and cold airflow, its casing that produces thermal current and cold airflow is respectively hot water storgae, cold rinse bank, be respectively equipped with heat-exchange tube in described hot water storgae, cold rinse bank, the two ends of described heat-exchange tube are stretched out respectively outside casing, its end is air intake opening and gas outlet, in described hot water storgae, heating rod is installed, is separately installed with stirrer in described hot water storgae, cold rinse bank.
Described hot water storgae and cold rinse bank are stainless steel water tank, and the outside surface of stainless steel water tank posts insulation film, and heating rod is arranged on the bottom of hot water storgae the water in hot water storgae is heated; Described heat-exchange tube is around three-dimensional heat-exchange tube, by the corrugated stainless steel tubing coiled coil, is got up.
Described multipoint temperature measuring system comprises high-precision platinum resistor, and the electric bridge that accurate row's resistance forms, with 16 high precision temperature acquisition modules of amplifier, computer processor.
its principle is: described stirrer stirs and makes the temperature of water body even the water body of hot water storgae and cold rinse bank respectively, described is the corrugated stainless steel tubing coiled coil around three-dimensional heat-exchange tube, in pipe, air-flow carries out heat interchange by corrugated tube and water, the ripple struction of tube wall makes the stronger turbulent flow of generation in air-flow, thereby improve the heat exchanger effectiveness of air-flow and water, because the thermal capacity of water is very large, therefore can provide for wind-tunnel the air-flow of temperature stabilization, room temperature changes can be ignored the impact of gas flow temperature, around three-dimensional heat-exchange tube, except air intake opening and gas outlet remainder, is immersed in tank fully, described multipoint temperature measuring system comprises the electric bridge that high-precision platinum resistor, accurate row's resistance form, with 16 high precision temperature acquisition modules of amplifier, computing machine processing etc., adopt relative method namely by comparing high-precision platinum resistor and precision resistance output voltage values, to calculate the resistance of platinum resistance, therefore measuring accuracy is only by the precision of precision resistance, the consistance of platinum resistance temperature coefficient, the temperature calibration precision decides, and system noise is eliminated by processing, described wind-tunnel adopts the low-speed wind tunnel design concept of standard, but structural design is unique, by air intake opening, honeycomb, the stabilized contraction pipe, experiment tube, anemostat, fan interface, axial flow blower and the second collapsible tube (hydraucone) are linked in sequence, two temperature constant and have its temperature difference of different temperature to preset in the experiment tube of the symmetrical wind-tunnel that is connected side by side, the size of wind tunnel speed by frequency converter by computer control, stable linear relationship is arranged between the frequency of frequency converter and wind speed, the surfaces externally and internally of wind-tunnel all posts insulation film and reduces the impact of environmental factor on air-flow.
Advantage of the present invention is:
(1) the present invention not only can obtain the controlled air-flow of speed, can also obtain two bursts of temperature constant and the constant air-flow of temperature difference.
(2) the present invention adopts corrugated stainless steel tubing as around three-dimensional heat-exchange tube, can, so that air-flow carries out sufficient heat exchange with water body in around three-dimensional heat-exchange tube, make the temperature constant of air-flow.
(3) the present invention adopts relative method to calculate the resistance of platinum resistance and, with 16 high precision temperature acquisition modules of amplifier, has improved the measuring accuracy of temperature, and temperature measurement accuracy is higher than 0.01 ℃.
(4) hot water storgae in the present invention, cold rinse bank outside surface post insulation film, and the surfaces externally and internally of wind-tunnel all posts insulation film, have reduced the interference of environment temperature to the constant temperature air-flow.
(5) junction between all pipelines of the present invention all adopts the outside surface of hard tube and hard tube all to post insulation film, keeps the constant minimizing energy loss of gas flow temperature.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of constant temperature airslide unit of the present invention.
Fig. 3 is construction of wind tunnel schematic diagram of the present invention.
Embodiment
referring to accompanying drawing, a kind of constant temperature wind-tunnel control system, include blower fan 1, wind-tunnel 2, constant temperature airslide 3, multipoint temperature measuring system 4 and computer control system 5, wind-tunnel 2 includes symmetrical side by side cold air ventilating duct 6 and hot gas ventilating duct 7, cold air ventilating duct 6 and hot gas ventilating duct 7 are by respectively by air inlet collection tube 13, stabilized contraction pipe 14, experiment tube 15, anemostat 16, fan interface pipe 17, axial flow blower 18 and the second collapsible tube 19 composition that is linked in sequence successively, in the mouth of pipe of the link of air inlet collection tube 13 and stabilized contraction pipe 14, honeycomb 20 is installed, the developmental tube 15 of cold air ventilating duct 6 and hot gas draft tube 7 is integrated and centre is provided with dividing plate, air inlet collection tube 13 is tapered tube, air intake opening is small end, stabilized contraction pipe 14 is comprised of cylindrical tube and tapered tube transition, and its small end is communicated with experiment tube 15, and experiment tube 15 is straight tube, anemostat 16 is inclined tube, fan interface pipe 17 is reduced pipe, and its small end is communicated with anemostat, and its large end is equipped with axial flow blower 18, described the second collapsible tube 19 is tapered tube, and its small end is gas outlet, the air inlet of cold air ventilating duct 6 and hot gas ventilating duct 7 is communicated to respectively the gas outlet of constant temperature airslide 3 heat-exchange tubes, described constant temperature airslide 3 is comprised of two casings that independently produce thermal current and cold airflow, its casing that produces thermal current and cold airflow is respectively hot water storgae 8, cold rinse bank 9, be respectively equipped with heat-exchange tube 10 in hot water storgae 8, cold rinse bank 9, the two ends of heat-exchange tube 10 are stretched out respectively outside casing, its end is air intake opening and gas outlet, heating rod 11 is installed in hot water storgae 8, is separately installed with stirrer 12 in hot water storgae 8, cold rinse bank 9, hot water storgae 8 and cold rinse bank 9 are stainless steel water tank, and the outside surface of stainless steel water tank posts insulation film, and heating rod 11 is arranged on the bottom of hot water storgae the water in hot water storgae is heated, heat-exchange tube is around three-dimensional heat-exchange tube, by the corrugated stainless steel tubing coiled coil, is got up, the air intake opening of described heat-exchange tube is connected with the air outlet of blower fan 12 respectively, temperature in described casing, cold air ventilating duct and hot gas ventilating duct detects by the multipoint temperature measuring system respectively, and the frequency of blower fan, temperature and multipoint temperature measuring system in temperature in casing, cold air ventilating duct and hot gas ventilating duct are controlled by computer control system respectively, multipoint temperature measuring system 4 comprises high-precision platinum resistor, and the electric bridge that accurate row's resistance forms, with 16 high precision temperature acquisition modules of amplifier, computer processor.
Described blower fan 1 is centrifugal blower.
The present invention produces the poor two strands of constant air-flows of speed controllable temperature, specifically comprises the following steps:
(1) control heating rod the water in hot water storgae is heated, open the multipoint temperature measuring system this moment, monitor the water temperature of hot water storgae and cold rinse bank constantly, when the water temperature of hot water storgae and cold rinse bank is poor while reaching the temperature difference of setting stopped heating.
(2) control stirrer and respectively the water body of the water in hot water storgae and cold rinse bank is stirred, and monitor the water temperature of hot water storgae and cold rinse bank constantly, constant when the water temperature of hot water storgae and cold rinse bank, and temperature difference stops the stirring of stirrer when constant.
(3) control centrifugal blower and make it to produce the air-flow of certain speed in wind-tunnel, monitor the temperature of wind-tunnel gas outlet air-flow constantly, after general 15 minutes, the gas flow temperature of wind-tunnel gas outlet reaches steady state value and gas flow temperature is poor constant.
The frequency of (4) regulating centrifugal blower can obtain friction speed two strands of air-flows that the temperature difference is constant
(5) repeating step (1), (2), (3), (4) can produce friction speed and two strands of variable air-flows of temperature difference in wind-tunnel.
Claims (4)
1. constant temperature wind-tunnel control system, include blower fan, wind-tunnel, the constant temperature airslide, multipoint temperature measuring system and computer control system, it is characterized in that: described wind-tunnel includes cold air ventilating duct and hot gas ventilating duct, the air inlet of described cold air ventilating duct and hot gas ventilating duct is communicated to respectively the gas outlet of heat-exchange tube in the constant temperature airslide, described constant temperature airslide includes the casing that produces thermal current and cold airflow, be respectively equipped with the heat-exchange tube that produces thermal current and cold airflow in described casing, the two ends of described heat-exchange tube are stretched out respectively outside casing, the air intake opening of described heat-exchange tube is connected with the air outlet of blower fan respectively, temperature in described casing, cold air ventilating duct and hot gas ventilating duct detects by the multipoint temperature measuring system respectively, and the frequency of blower fan, temperature and multipoint temperature measuring system in temperature in casing, cold air ventilating duct and hot gas ventilating duct are controlled by computer control system respectively,
Described wind-tunnel is comprised of symmetrical side by side cold air ventilating duct and hot gas ventilating duct, described cold air ventilating duct and hot gas ventilating duct are linked in sequence and form successively by air inlet collection tube, stabilized contraction pipe, experiment tube, anemostat, fan interface pipe, axial flow blower and the second collapsible tube respectively, in the mouth of pipe of the link of described air inlet collection tube and stabilized contraction pipe, honeycomb is installed, the experiment tube of described cold air ventilating duct and hot gas ventilating duct is integrated and centre is provided with dividing plate;
Described constant temperature airslide is comprised of two casings that independently produce thermal current and cold airflow, its casing that produces thermal current and cold airflow is respectively hot water storgae, cold rinse bank, be respectively equipped with heat-exchange tube in described hot water storgae, cold rinse bank, the two ends of described heat-exchange tube are stretched out respectively outside casing, its end is air intake opening and gas outlet, in described hot water storgae, heating rod is installed, is separately installed with stirrer in described hot water storgae, cold rinse bank.
2. a kind of constant temperature wind-tunnel control system according to claim 1, it is characterized in that: described air inlet collection tube is tapered tube, and air intake opening is small end, and described stabilized contraction pipe is comprised of cylindrical tube and tapered tube transition, its small end is communicated with experiment tube, described experiment tube is straight tube, and described anemostat is inclined tube, and described fan interface pipe is reduced pipe, its small end is communicated with anemostat, its large end is equipped with axial flow blower, and described the second collapsible tube is tapered tube, and its small end is gas outlet.
3. a kind of constant temperature wind-tunnel control system according to claim 1, it is characterized in that: described hot water storgae and cold rinse bank are stainless steel water tank, the outside surface of stainless steel water tank posts insulation film, and heating rod is arranged on the bottom of hot water storgae the water in hot water storgae is heated; Described heat-exchange tube is around three-dimensional heat-exchange tube, by the corrugated stainless steel tubing coiled coil, is got up.
4. a kind of constant temperature wind-tunnel control system according to claim 1, it is characterized in that: the multipoint temperature measuring system comprises high-precision platinum resistor, the electric bridge that accurate row's resistance forms, with 16 high precision temperature acquisition modules of amplifier, computer processor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100909049A CN102621907B (en) | 2012-03-31 | 2012-03-31 | Constant temperature wind tunnel control system |
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| CN2012100909049A CN102621907B (en) | 2012-03-31 | 2012-03-31 | Constant temperature wind tunnel control system |
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| CN102621907B true CN102621907B (en) | 2013-11-13 |
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| CN113687626B (en) * | 2021-10-26 | 2022-01-18 | 中国空气动力研究与发展中心超高速空气动力研究所 | Emergency cut-off control device and method for dangerous media of hypersonic wind tunnel |
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| JPS63212836A (en) * | 1987-03-02 | 1988-09-05 | Toyo Eng Works Ltd | Variable constant temperature and constant humidity controller for environmental test room for self-propelled vehicle |
| AU5026400A (en) * | 1999-05-21 | 2000-12-12 | Aero Systems Engineering, Inc. | Wind tunnel and heat exchanger therefor |
| CN101639397B (en) * | 2009-07-15 | 2011-05-18 | 北京航空航天大学 | Temperature adjusting system of integrated sand-blowing dust-blowing environment simulation system and method thereof |
| CN102192828B (en) * | 2010-03-02 | 2013-07-24 | 中国科学院理化技术研究所 | Low temperature wind tunnel |
| CN102135467B (en) * | 2010-12-27 | 2012-09-05 | 中国科学院光电技术研究所 | Hot-wind turbulence simulation device |
| CN102141786B (en) * | 2011-01-13 | 2012-08-01 | 北京航空航天大学 | Composite control device for positive pressure air-cooling system of sand dust wind tunnel driving motor |
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