CN109916587B - Double-test-section direct-current gust wind tunnel - Google Patents
Double-test-section direct-current gust wind tunnel Download PDFInfo
- Publication number
- CN109916587B CN109916587B CN201910224728.5A CN201910224728A CN109916587B CN 109916587 B CN109916587 B CN 109916587B CN 201910224728 A CN201910224728 A CN 201910224728A CN 109916587 B CN109916587 B CN 109916587B
- Authority
- CN
- China
- Prior art keywords
- section
- test
- wind tunnel
- test section
- backflow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 claims abstract description 131
- 238000009792 diffusion process Methods 0.000 claims abstract description 35
- 230000008602 contraction Effects 0.000 claims abstract description 17
- 230000006641 stabilisation Effects 0.000 claims abstract description 5
- 238000011105 stabilization Methods 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims description 32
- 238000010992 reflux Methods 0.000 claims description 19
- 238000013016 damping Methods 0.000 claims description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 6
- 230000009977 dual effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 10
- 238000002474 experimental method Methods 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 238000007664 blowing Methods 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 230000002517 constrictor effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001595 contractor effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Landscapes
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a double-test-section direct current wind-gushing wind tunnel which comprises an outlet section, a power section, a diffusion section, a first test section, a contraction section and a stabilization section; one end of the power section is connected with an outlet section communicated with the outside, and the other end of the power section is connected with a diffusion section; one end of the first test section is connected with the diffusion section, and the other end of the first test section is connected with the contraction section; the stable section is being connected to shrink section one side, is provided with first accent flow section on the diffusion section, still is provided with the second test section between export section and the power section, is provided with the backward flow section between power section and the second test section, and backward flow section both ends are provided with the second accent flow section, are provided with the door that opens and shuts on the lateral wall of backward flow section. The two test sections can simultaneously perform the test effect, and the second test section can be closed according to actual needs.
Description
Technical Field
The invention relates to an experimental device for an gust wind tunnel, in particular to a direct-current gust wind tunnel with double test sections.
Background
The wind tunnel is simply an elongated pipe with special design, and a power system (a motor and a fan) generates an air flow which can be controlled manually and freely in the wind tunnel, so that the wind tunnel is used for simulating the flow phenomenon of air when an object moves in the air, the stress condition of the object, the flow phenomenon of the air around certain fixed objects, the migration and diffusion phenomena of smoke in the air and the like.
Boundary layer wind tunnels play an increasingly important role in research in the field of wind engineering. The boundary layer wind tunnel has the capability of simulating the flow of an atmospheric boundary layer, and can provide technical support for researching the diffusion rule of atmospheric pollutants and the safety design research of a large-span bridge, a high-rise building, a tower and other unique structures.
However, for some extreme meteorological events (such as gusts, hurricanes, etc.) where unsteady airflow dominates, conventional boundary layer wind tunnels lack the ability to simulate the transient effects of these events. Therefore, a boundary layer wind tunnel that produces gust effects is needed.
Turbulence in the atmosphere, in general, the larger the turbulence scale, the lower the frequency of turbulence; the larger the dimensions the larger the turbulence dimension created by the obstacle. The turbulence generated by the conventional atmospheric boundary layer wind tunnel through the wedges and the rough elements is generally about 0.1m in scale, so that the generated turbulence frequency is relatively high. In actual atmosphere, because of the existence of large-scale obstacles such as high-rise buildings, hillsides, forests and the like, the energy of low-frequency parts in turbulence cannot be ignored, so that pulsating wind with large scale and low frequency is necessarily generated in the wind tunnel, and the pulsating wind can be more matched with the actual atmosphere, which is the design meaning of the wind tunnel of the gust wind.
Currently, an atmospheric boundary layer wind tunnel capable of generating gust effect generally adopts a mechanical swing mechanism or adjusts the rotation speed of a fan to generate gust. However, the wind gust generated in this way has a high wind gust frequency. The random gust speed in the atmospheric boundary layer is high or low, so that the current gust wind tunnel cannot completely simulate the random gust in the atmospheric boundary layer.
The air flow can be divided into a blowing-out type air tunnel and a suction type air tunnel according to the flowing direction of the air flow, wherein the blowing-out type air tunnel takes the air flow blown out by a fan as a flowing medium of the air tunnel; the suction wind tunnel is a low-pressure area formed by rotating the fan blades, and sucks air into the air tunnel to form air flow. The application range of the two types of wind tunnels is wide, but the specific application fields are different.
The premise of high pollution in a practical environment is that the ambient wind speed is close to a static or very low meteorological condition, because only in the environment, the discharged pollutants cannot be spread out, and heavy pollution in a local area is caused. Therefore, the DC suction type wind tunnel is required to simulate meteorological conditions with wind speed close to zero and stable wind environment. The main reason that direct current blowing is unsuitable is that the power section is positioned at the upstream of the test section, the gaps among the multiple blades of the fan are large when the fan rotates at a low speed, so that an array effect with fixed frequency can be generated, and meanwhile, wind can generate multidirectional turbulent flow when being diffused downwards through the power section, so that the wind environment is unstable. The backflow type wind tunnel can not be discharged outside an experimental environment after a pollution source is released when a pollutant experiment is carried out due to the characteristic of closed backflow of the backflow type wind tunnel, so that the background pollution concentration of a test section is continuously superposed and increased, and the measurement of the experiment is hindered. In the experiment of sand and dust, a DC blowing wind tunnel is needed, and the use of DC suction and reflux can lead the gravel to be brought into the power section by airflow to damage the fan.
The foreign individual closed-circuit and open-circuit dual-purpose wind tunnel has a complex structure, is difficult to operate, cannot generate an array effect, and cannot be used in a large-scale industrial application wind tunnel. The double-test gust wind tunnel device provided by the invention can be used for two tests in one wind tunnel, so that the cost is greatly saved and the efficiency is improved.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a double-test-section direct current gust wind tunnel which has the advantages of simulating natural environment and generating gusts with high and low frequency. And can carry out two kinds of experiments or switch the advantage of single/double test section according to the test requirement in a wind tunnel, saved the land resource occupied of establishing the wind tunnel laboratory at the same time.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a DC gust wind tunnel with double test sections comprises an outlet section, a power section, a diffusion section, a first test section, a contraction section and a stabilization section; one end of the power section is connected with an outlet section communicated with the outside, and the other end of the power section is connected with a diffusion section; one end of the first test section is connected with the diffusion section, and the other end of the first test section is connected with the contraction section; one side of the contraction section is connected with the stabilizing section, the diffusion section is provided with the first flow regulating section, and the second test section is also arranged between the outlet section and the power section.
Further, be provided with the backward flow section between power section and the second test section, backward flow section both ends are provided with the second and transfer the flow section, are provided with the door that opens and shuts on the lateral wall of backward flow section.
Further, the reflux section is perpendicular to the second test section and the first test section respectively to enable the main pipeline of the wind tunnel to be U-shaped, and guide vane units are arranged at the connecting corners of two sides of the reflux section.
Further, the guide vane unit close to one end of the power section is movable, the guide vane unit close to one end of the second test section is fixed, a linear rolling guide rail pair is arranged at the bottom of the movable guide vane unit, and the guide vane unit can translate into the backflow section through the linear rolling guide rail pair.
Further, the opening and closing door is movable and is positioned at the projection position of the power section on the reflux section, and can rotate around the shaft to realize opening and closing so that the reflux section can be communicated or closed; when the opening and closing door is opened inwards, the reflux section is in a closed state, and the second test section is closed; when the door that opens and shuts is closed, backward flow section and power section intercommunication, the second test section is opened, and the air current can be from first test section through backward flow section flow direction second test section finally through the export section to the external world.
Further, a damping net and a honeycomb device are arranged between the second test section and the reflux section, and a second contraction section is arranged between the second test section and the reflux section.
Further, the power section is further provided with a rear-end fan cover, a rotation stopping sheet, a fan and a front-end fan cover which are sequentially connected, the rear-end fan cover faces the outlet section, and the front-end fan cover faces the diffusion section.
Further, the first flow regulating section comprises a first shutter device and a first electric door, the first shutter device is arranged on the outer wall of the wind tunnel, the first electric door is located on the inner side of the first shutter device, a plurality of blades are arranged on the first shutter device, air flow can flow into the diffusion section from the outside through gaps among the blades, the first electric door can move in a translational mode along the inner wall of the wind tunnel, the number of the flow regulating sections is multiple, and the diffusion sections are symmetrically arranged on the side wall of the diffusion section.
Further, the second flow regulating section comprises a second shutter device and a second electric door, the second shutter device is arranged on the outer wall of the wind tunnel, the second electric door is located on the inner side of the second shutter device, a plurality of blades are arranged on the second shutter device, air flow can flow into the second electric door (can move horizontally along the inner wall of the wind tunnel from the outside through gaps among the blades, the number of the flow regulating sections is multiple, and the side walls of the two ends of the flow regulating sections are symmetrically arranged.
Further, the inside of the stabilizing section is connected with two damping nets, one side of each damping net is connected with a honeycomb device, and the honeycomb device is communicated with the outside.
Through the technical scheme, when the opening and closing door is closed, wind enters the contraction section from the stabilizing section, flows back through the reflux section after passing through the first test section, the diffusion section and the power section, flows back through the second contraction section, flows to the second test section and is finally discharged through the outlet section. The cross section area of the second test section after the second shrinkage section is shrunk is two thirds of that of the first test section, the wind speed is improved compared with that of the first test section, the requirement of a high wind speed test of a small scale model can be met, and at the moment, the first test section and the second test section can be used for experiments. The first test section is in a suction type at the upstream of the power section, and the second test section is in a blowing type through the connection of the reflux section and the downstream of the power section. The first test section of inhaling can carry out building structure wind vibration wind pressure test. The blowing type second test section can be used for carrying out a dust and other particle pollutant diffusion test. Because the measuring instruments are different, interference to mutual tests can not be generated, and therefore, the two test sections can be tested simultaneously.
When the movable guide vane unit moves into the backflow section and the opening and closing door is opened inwards, the backflow section is closed, and the wind tunnel is a single test section direct current suction wind tunnel. Wind enters the contraction section from the inlet stabilization section, passes through the first test section, the diffusion section and the power section, and is directly discharged to the outside through the door opening of the opening and closing door, so that the gas pollutant concentration superposition influence on the air at the air inlet is avoided, the first test section can carry out the gas pollutant diffusion test, and the second test section is disabled.
The stabilizing section is an equal-diameter pipeline which ensures that the air flow is kept uniform and stable, and rectifying equipment such as a honeycomb device, a damping net and the like are also arranged in the stabilizing section. Wherein the damping net makes the inlet air flow uniform and stable, and the honeycomb device combs and guides the air flow. The other side of the stabilizing section is connected with a contraction section which can uniformly accelerate the air flow, and when the air flow flows along the contraction section, the separation does not occur on the wall of the hole.
During the test, the air flow flows in from the air inlet, becomes more uniform through the honeycomb device, then increases the air flow speed through the contraction section, then enters the first test section, reaches the outlet section through the diffusion section after passing through the test section, and finally enters the atmosphere from the outlet section.
When the opening and closing door is closed, the wind tunnel is a double-test-section direct current wind tunnel, the first test section is a direct current suction test section, the second test section is a direct current blowing test section, and the double test sections run simultaneously. At the moment, the first electric door is opened, so that part of air flow is sucked into the wind tunnel from the outside through the shutter device and then is blown to the second test section through the power section, and the wind speed at the first test section of the main channel is reduced. Meanwhile, the opening and closing of the blades of the first shutter device in the first flow regulating section are controlled, so that the flow of air sucked into the wind tunnel from the outside can be changed, the wind speed of the first test section is changed, and gusts are formed. The speed of gust change in the first test section can be changed by controlling the opening and closing frequency of the blades of the first shutter device. Similarly, after the second electric door is opened, when the air flow blows from the second test section to the outlet, part of the air flow is discharged outside the wind tunnel through the second shutter device of the second flow regulating section, so that the wind speed reaching the second test section changes in height, and gusts are generated in the second test section. The speed of gust change in the second test section can be changed by controlling the opening and closing frequency of the blades of the second shutter device.
When the guide vane unit close to the power section moves to the position, in the backflow section, of the opening and closing door to be opened inwards by 90 degrees, the wind tunnel is changed into a single test section from the double test section, the wind tunnel is a direct current suction wind tunnel at the moment, and the electric doors on the two sides of the first flow regulating section are opened at the moment, so that part of air flow can be sucked into the wind tunnel from the outside through the first shutter device and then blown to the opening through the power section, and the wind speed at the first test section of the main channel is reduced. Meanwhile, the blades of the first flow regulating section shutter device are controlled to open and close, so that the air flow sucked into the wind tunnel from the outside can be changed, the wind speed of the first test section is changed, and gusts are formed. The speed of gust change in the first test section can be changed by controlling the opening and closing frequency of the blades of the shutter device.
The wind tunnel capable of being simply switched between the single test section and the double test sections is suitable for the requirements of different environmental pollution tests. The main reason that direct current blowing is not suitable for carrying out pollution diffusion test is that the power section is positioned at the upstream of the test section, the gaps among the multiple blades of the fan are large when the fan rotates at a low speed, the fixed frequency array effect can be generated, and meanwhile, the wind can generate multidirectional turbulent flow when being diffused downwards through the power section, so that the wind environment is unstable. The backflow type wind tunnel can not be discharged outside an experimental environment after a pollution source is released when a pollutant experiment is carried out due to the characteristic of closed backflow of the backflow type wind tunnel, so that the background pollution concentration of a test section is continuously superposed and increased, and the measurement of the experiment is hindered. The reason why the U-shape is chosen as the structure is because of the saving of the floor space. The space utilization rate of the laboratory is improved as much as possible.
In summary, the invention has the following beneficial effects:
1. the structure is simple, and the construction cost is relatively low;
2. the simulation of different wind engineering projects (such as wind pressure wind vibration, wind environment, air pollution, material transmission and the like) in an atmospheric boundary layer can be realized in a large wind tunnel, the background concentration increase caused by the accumulation effect of the tracer is not needed to be worried about, the accuracy of a simulation experiment is affected, and the damage of fine particles to a power section during a dust-forming experiment is beneficial to practical engineering application;
3. most wind tunnels, the air flow speed is changed by adjusting the number of revolutions of the fan, which makes the speed change of the test section slower. However, by adjusting the opening and closing of the blades of the shutter device in the flow regulating section, the invention almost instantaneously changes the air flow speed in the test section to form wind gusts with variable wind speed, and can more accurately simulate the natural wind in the actual atmospheric boundary layer, thus the unstable and constant flow simulation is very important, a new field is opened up, and test opportunities are provided for the research of the unstable and constant flow aerodynamics;
4. the single test or the simultaneous test or the two tests can be selected, so that the method is more economical and quick and has higher efficiency. Meanwhile, the occupied area is saved, and the space utilization rate of a laboratory is improved.
Drawings
FIG. 1 is a schematic diagram of a double test section DC gust wind tunnel;
FIG. 2 is a schematic diagram of a state of a double test section DC gust wind tunnel when an opening door is opened;
FIG. 3 is a schematic view of the first power door when opened;
FIG. 4 is a schematic view of the first power door when closed;
FIG. 5 is a schematic view of the second power door when closed;
fig. 6 is a schematic view of the structure of the second power door when opened.
In the figure: 101. a stabilizing section; 102. a constriction section; 103. a first test section; 104. a first flow regulating section; 105. a diffusion section; 106. a power section; 107. an outlet section; 109. a fan; 110. a front end housing; 111. a back end machine cover; 112. a rotation stop sheet; 113. a first shutter device; 114. a first electrically operated gate; 116. a honeycomb device; 117. a damping net; 302. a second test section; 315. a second electrically operated gate; 316. a second shutter device; 330. an opening/closing door; 331. a second flow regulating section; 332. a deflector unit; 334. and (5) a reflux section.
Detailed Description
Referring to fig. 1-6, a dual test section dc gust wind tunnel includes an outlet section 107, a power section 106, a diffuser section 105, a first test section 103, a shrink section 102, and a stabilizer section 101; one end of the power section 106 is connected with an outlet section 107 communicated with the outside, and the other end of the power section 106 is connected with a diffusion section 105; one end of the first test section 103 is connected with the diffusion section 105, and the other end is connected with the contraction section 102; the stabilizing section 101 is connected to one side of the contracting section 102, and is characterized in that: the diffusion section 105 is provided with a first flow regulating section 104, and a second test section 302 is also provided between the outlet section 107 and the power section 106. A reflux section 334 is arranged between the power section 106 and the second test section 302, two ends of the reflux section 334 are provided with second flow regulating sections 331, and the side wall of the reflux section 334 is provided with an opening and closing door 330. The reflux section 334 is perpendicular to the second test section 302 and the first test section 103 respectively to enable the main pipeline of the wind tunnel to be U-shaped, and the connecting corners of two sides of the reflux section 334 are provided with guide vane units 332. The guide vane unit 332 near one end of the power section 106 is movable, the guide vane unit 332 near one end of the second test section 302 is fixed, a linear rolling guide rail pair is arranged at the bottom of the movable guide vane unit 332, and the guide vane unit 332 can translate into the backflow section 334 through the linear rolling guide rail pair. The opening and closing door 330 is movable and is positioned at the projection position of the power section 106 on the backflow section 334, and can rotate around the shaft to realize opening and closing so that the backflow section 334 can be communicated or closed; when the door 330 is opened inward, the return section 334 is in a closed state and the second test section 302 is closed; when the shutter door 330 is closed, the return section 334 communicates with the power section 106 and the second test section 302 is opened, and air flow is allowed to flow from the first test section 103 through the return section 334 to the second test section 302 and finally out through the outlet section 107.
A damping mesh 117 and a honeycomb 116 are disposed between the second test section 302 and the return section 334, as well as a second constriction section. The power section 106 is further provided with a rear end fan housing 111, a rotation stop tab 112, a fan 109 and a front end fan housing 110 connected in this order, with the rear end fan housing 111 facing the outlet section 107 and the front end fan housing facing the diffuser section 105. The first flow regulating section 104 comprises a first shutter device 113 and a first electric door 114, the first shutter device 113 is arranged on the outer wall of the wind tunnel, the first electric door 114 is located on the inner side of the first shutter device 113, a plurality of blades are arranged on the first shutter device 113, air flow can flow into the diffusion section 105 from the outside through gaps among the blades, the first electric door 114 can move in a translational mode along the inner wall of the wind tunnel, the number of the flow regulating sections 104 is multiple, and the flow regulating sections are symmetrically arranged on the side wall of the diffusion section 105.
The second flow regulating section 331 comprises a second shutter device 316 and a second electric door 315, the second shutter device 316 is arranged on the outer wall of the wind tunnel, the second electric door 315 is located on the inner side of the second shutter device 316, a plurality of blades are arranged on the second shutter device 316, air flow can flow into the wind tunnel pipeline from the outside through gaps among the blades, the second electric door 315 can move in a translational mode along the inner wall of the wind tunnel, the number of the flow regulating sections 104 is multiple, and the side walls of two ends of the flow regulating sections 334 are symmetrically arranged. The inside of the stabilizing section 101 is connected with two damping nets 117, one side of the damping net 117 is connected with a honeycomb 116, and the honeycomb 116 is communicated with the outside.
The reflux section 334 is perpendicular to the second test section 302 and the first test section 103 respectively; in the corners, due to the turning of the air flow, centrifugal forces occur from the centre of curvature to the outer wall of the tube, which causes the air flow to increase in pressure on the outer wall and decrease in pressure on the inner wall when turning. The flow rate of the air flow at the outer wall will decrease and the flow rate at the inner wall will correspondingly increase, so that a diffuse effect will occur near the outer wall and a constrictive effect will occur near the inner wall. After turning, the airflow has the opposite phenomenon, that is, a diffusion effect is generated near the inner wall and a contraction effect is generated near the outer wall. The diffusion effect causes the gas flow to separate from the inner and outer walls. The air flow is easily separated at the corners where the corner deflector units 332 are carefully designed in order to prevent the air flow from being separated, improve the flow of the air flow and reduce the loss. The two sides of the backflow section 334 are also provided with a second flow regulating section 331 and an opening and closing door 330. When the door 330 is closed (as shown in fig. 1), a single loop is formed inside the wind tunnel, the air flows from the first test section 103 to the second test section 302 through the backflow section 334, and a damping net 117 is further arranged between the second test section 302 and the backflow section 334, so that the air flow becomes uniform, and finally the air flow flows out from the outlet section 107. In this case, the DC was double test section. The flow rate is controlled by controlling the opening and closing of the second electric door 315 in the second flow regulating section 331. When the deflector unit 332 translates into 334, the shutter 330 is opened (as shown in fig. 2), the shutter 330 is perpendicular to the backflow section 334, the shutter 330 separates the first test section 103 from the second test section 302, when the first test section 103 is opened, the second test section 302 is closed, and the air flow directly flows out from the door opening of the shutter 330, which is a single test section direct current.
The second flow regulating section 331 operates according to the following principle: referring to fig. 5, when the second motor-controlled electric door 315 is closed, a closed area is formed inside the second flow regulating section 331, and the air flow in the wind tunnel flows from the first test section 103 to the second test section 302 through the return section 334. When the second electrically operated gate 315 is opened, as shown in fig. 6, the second flow regulating section 331 forms an open circuit, and a part of the airflow can flow out from the second shutter device 316.
Claims (5)
1. A double-test-section direct current gust wind tunnel comprises an outlet section (107), a power section (106), a diffusion section (105), a first test section (103), a contraction section (102) and a stabilization section (101); one end of the power section (106) is connected with an outlet section (107) communicated with the outside, and the other end of the power section (106) is connected with a diffusion section (105); one end of the first test section (103) is connected with the diffusion section (105), and the other end of the first test section is connected with the contraction section (102); one side of the contraction section (102) is connected with the stabilization section (101), and is characterized in that: a first flow regulating section (104) is arranged on the diffusion section (105), and a second test section (302) is also arranged between the outlet section (107) and the power section (106); a backflow section (334) is arranged between the power section (106) and the second test section (302), second flow regulating sections (331) are arranged at two ends of the backflow section (334), and an opening and closing door (330) is arranged on the side wall of the backflow section (334); the backflow section (334) is perpendicular to the second test section (302) and the first test section (103) respectively to enable a main pipeline of the wind tunnel to be U-shaped, and guide vane units (332) are arranged at the connecting corners of two sides of the backflow section (334); the guide vane unit (332) close to one end of the power section (106) is movable, the guide vane unit (332) close to one end of the second test section (302) is fixed, a linear rolling guide rail pair is arranged at the bottom of the movable guide vane unit (332), and the guide vane unit (332) can translate into the reflux section (334) through the linear rolling guide rail pair; the opening and closing door (330) is movable and is positioned at the projection position of the power section (106) on the backflow section (334), and can rotate around the shaft to realize opening and closing so that the backflow section (334) can be communicated or closed; when the opening and closing door (330) is opened inwards, the backflow section (334) is in a closed state, and the second test section (302) is closed; when the opening and closing door (330) is closed, the backflow section (334) is communicated with the power section (106), the second test section (302) is opened, and air flow can flow from the first test section (103) to the second test section (302) through the backflow section (334) and finally be discharged to the outside through the outlet section (107); the inside of the stabilizing section (101) is connected with two damping nets (117), one side of each damping net (117) is connected with a honeycomb device (116), and the honeycomb device (116) is communicated with the outside.
2. The dual test section dc wind tunnel of claim 1, wherein: a damping net (117) and a honeycomb (116) as well as a second contraction section are arranged between the second test section (302) and the reflux section (334).
3. The dual test section dc wind tunnel of claim 2, wherein: the power section (106) is further provided with a rear-end fan housing (111), a rotation stop sheet (112), a fan (109) and a front-end fan housing (110) which are connected in sequence, the rear-end fan housing (111) faces the outlet section (107), and the front-end fan housing faces the diffusion section (105).
4. A dual test section dc gust wind tunnel according to claim 3, wherein: the first flow regulating section (104) comprises a first shutter device (113) and a first electric door (114), the first shutter device (113) is arranged on the outer wall of the wind tunnel, the first electric door (114) is located on the inner side of the first shutter device (113), a plurality of blades are arranged on the first shutter device (113), air flow can flow into the diffusion section (105) from the outside through gaps among the blades, the first electric door (114) can move in a translational mode along the inner wall of the wind tunnel, the number of the first flow regulating sections (104) is multiple, and the air flow is symmetrically arranged on the side wall of the diffusion section (105).
5. The dual test section dc wind tunnel of claim 4, wherein: the second flow regulating section (331) comprises a second shutter device (316) and a second electric door (315), the second shutter device (316) is arranged on the outer wall of the wind tunnel, the second electric door (315) is located on the inner side of the second shutter device (316), a plurality of blades are arranged on the second shutter device (316), air flow can flow into the wind tunnel through gaps between the blades from the outside, the second electric door (315) can move in a translational mode along the inner wall of the wind tunnel, the number of the first flow regulating sections (104) is multiple, and the side walls of two ends of the backflow sections (334) are symmetrically arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910224728.5A CN109916587B (en) | 2019-03-23 | 2019-03-23 | Double-test-section direct-current gust wind tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910224728.5A CN109916587B (en) | 2019-03-23 | 2019-03-23 | Double-test-section direct-current gust wind tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109916587A CN109916587A (en) | 2019-06-21 |
| CN109916587B true CN109916587B (en) | 2024-02-06 |
Family
ID=66966500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910224728.5A Active CN109916587B (en) | 2019-03-23 | 2019-03-23 | Double-test-section direct-current gust wind tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109916587B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530596A (en) * | 2019-09-27 | 2019-12-03 | 国电环境保护研究院有限公司 | The flow tunnel testing device and method that simulated air fine particle concentration increases and subsides |
| CN113494988B (en) * | 2020-03-20 | 2023-06-23 | 上海汽轮机厂有限公司 | Ventilation system and application thereof |
| CN112556969A (en) * | 2020-12-07 | 2021-03-26 | 江苏中信博新能源科技股份有限公司 | Wind tunnel for testing photovoltaic solar system |
| CN112644741B (en) * | 2020-12-30 | 2022-09-27 | 哈尔滨工业大学 | Low-voltage low-density Mars dust storm environment simulation device and method thereof |
| CN113029496B (en) * | 2021-03-04 | 2022-06-21 | 浙江大学 | Miniature vertical wind tunnel test device for low-turbulence extremely-low-speed airflow |
| CN113959671B (en) * | 2021-10-22 | 2022-09-20 | 中国科学院新疆生态与地理研究所 | But two straight-through closed circulation wind-tunnel laboratories |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09329524A (en) * | 1996-06-06 | 1997-12-22 | Masaru Matsumoto | Wind tunnel experimenting apparatus |
| CN104912740A (en) * | 2015-05-18 | 2015-09-16 | 王茂成 | Barrel type wind power generator with multiple impeller units |
| KR101683056B1 (en) * | 2016-08-25 | 2016-12-08 | 주식회사 에이알티플러스 | Wind tunnel for testing filter with filter change module |
| CN107436220A (en) * | 2017-07-19 | 2017-12-05 | 国网福建省电力有限公司 | A kind of reverse-flow type frequency control multi-fan array wind-tunnel and its test method |
| CN209372359U (en) * | 2019-03-23 | 2019-09-10 | 国电环境保护研究院有限公司 | A kind of double test section direct current gust wind tunnels |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140230577A1 (en) * | 2013-02-21 | 2014-08-21 | The University Of Akron | Real-time measurement system for monitoring and/or controlling properties of a composition transitioning from liquid state to solid state |
-
2019
- 2019-03-23 CN CN201910224728.5A patent/CN109916587B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09329524A (en) * | 1996-06-06 | 1997-12-22 | Masaru Matsumoto | Wind tunnel experimenting apparatus |
| CN104912740A (en) * | 2015-05-18 | 2015-09-16 | 王茂成 | Barrel type wind power generator with multiple impeller units |
| KR101683056B1 (en) * | 2016-08-25 | 2016-12-08 | 주식회사 에이알티플러스 | Wind tunnel for testing filter with filter change module |
| CN107436220A (en) * | 2017-07-19 | 2017-12-05 | 国网福建省电力有限公司 | A kind of reverse-flow type frequency control multi-fan array wind-tunnel and its test method |
| CN209372359U (en) * | 2019-03-23 | 2019-09-10 | 国电环境保护研究院有限公司 | A kind of double test section direct current gust wind tunnels |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109916587A (en) | 2019-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109916587B (en) | Double-test-section direct-current gust wind tunnel | |
| Tominaga et al. | Wind tunnel analysis of flow and dispersion in cross-ventilated isolated buildings: Impact of opening positions | |
| Ohba et al. | Study on airflow characteristics inside and outside a cross-ventilation model, and ventilation flow rates using wind tunnel experiments | |
| Jischke et al. | Laboratory simulation of tornadic wind loads on a rectangular model structure | |
| CN109799057B (en) | Reflux dual-purpose array wind tunnel | |
| Kang et al. | Improvement of natural ventilation in a large factory building using a louver ventilator | |
| CN209485653U (en) | A kind of dual-purpose battle array wind-tunnel of reflux | |
| CN115468731B (en) | Non-stationary wind field simulation device based on air quantity adjustment | |
| CN109799059B (en) | DC backflow dual-purpose gust wind tunnel with bypass | |
| CN109028429A (en) | A kind of vortex ventilating system and method suitable for large-space clean factory building | |
| CN209372359U (en) | A kind of double test section direct current gust wind tunnels | |
| CN109799062B (en) | Blowing type wind-blowing wind tunnel with drainage section | |
| Halitsky | Diffusion of vented gas around buildings | |
| CN220084883U (en) | Wind tunnel for wind speed sensor detection | |
| CN109799058B (en) | Double-test-section direct-current wind-gusting wind tunnel with bypass | |
| CN209372355U (en) | A kind of band bypass revolving door direct current blows formula gust wind tunnel | |
| CN209485655U (en) | A kind of dual-purpose gust wind tunnel of direct current reflux with bypass | |
| CN209372358U (en) | A kind of double test section direct current gust wind tunnels of band bypass | |
| CN209485652U (en) | A kind of direct current suction gust wind tunnel with bypass | |
| CN109799061B (en) | Suction type gust wind tunnel with porous rotating device | |
| CN109632244B (en) | Direct-current blowing type wind-blowing wind tunnel with bypass | |
| CN209485654U (en) | A kind of direct current suction gust wind tunnel with tune stream section | |
| CN209198041U (en) | A kind of direct current of band bypass blows formula gust wind tunnel | |
| CN109799056B (en) | Direct current suction type gust wind tunnel with bypass | |
| CN109632245B (en) | Direct-current blowing type wind-blowing wind tunnel with bypass revolving door |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |