CN110542531B - Material model environment experiment bin based on improvement of coal power generation efficiency - Google Patents
Material model environment experiment bin based on improvement of coal power generation efficiency Download PDFInfo
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- CN110542531B CN110542531B CN201910873069.8A CN201910873069A CN110542531B CN 110542531 B CN110542531 B CN 110542531B CN 201910873069 A CN201910873069 A CN 201910873069A CN 110542531 B CN110542531 B CN 110542531B
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- 239000000463 material Substances 0.000 title claims abstract description 44
- 238000002474 experimental method Methods 0.000 title claims abstract description 20
- 239000003245 coal Substances 0.000 title claims abstract description 14
- 238000010248 power generation Methods 0.000 title abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 48
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims description 26
- 230000008602 contraction Effects 0.000 claims description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 11
- 238000009792 diffusion process Methods 0.000 claims description 10
- 230000007613 environmental effect Effects 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a material model environment experiment bin based on improving coal power generation efficiency. Comprising the following steps: the wind tunnel comprises a wind tunnel body which is provided with at least a power section and is in a shape like a Chinese character 'hui', wherein the wind tunnel body is at least provided with a group of corresponding nozzle sections, the nozzle sections are used for being connected with a material model to be tested, and a door sealing structure is arranged at the downstream position of the nozzle sections along the advancing direction of air flow. According to the embodiment of the invention, one device can realize different detection requirements of various tests, has strong functionality, reduces test cost, and greatly improves test accuracy and test efficiency.
Description
Technical Field
The invention relates to the technical field of hydrodynamics, in particular to a material model environment experiment bin based on improving coal power generation efficiency.
Background
The thermal power generation process comprises the following steps: the combustible material (such as coal) heats water to generate steam during combustion, chemical energy of the fuel is converted into heat energy, steam pressure pushes the steam turbine to rotate, the heat energy is converted into mechanical energy, and then the steam turbine drives the generator to rotate, so that the mechanical energy is converted into electric energy. In the energy conversion process, a series of pipeline connecting devices are involved, wherein the influence of external environmental wind is most obvious in the energy transmission process, in order to reduce energy loss and improve the power generation efficiency, people manufacture a material model related to a pipeline connecting structure of a power plant when designing a pipeline, and wind tunnel tests are carried out on the material model.
In the related art, the material model research device is single, and a plurality of test devices are often needed for the working simulation of the material model under different pressure environments or different working states, so that the cost of the test is increased, the installation is convenient, the parameter calibration between different devices is complex, and the test implementation difficulty is greatly increased.
Disclosure of Invention
In order to solve the problems in the related art, the invention discloses a material model environment experiment bin based on improving the coal power generation efficiency, which improves the functionality of a material model test device and reduces the experiment difficulty.
Material model environment experiment bin based on improve coal generating efficiency, its characterized in that includes: the wind tunnel comprises a wind tunnel body which is provided with at least a power section and is in a shape like a Chinese character 'hui', wherein the wind tunnel body is at least provided with a group of corresponding nozzle sections, the nozzle sections are used for being connected with a material model to be tested, and a door sealing structure is arranged at the downstream position of the nozzle sections along the advancing direction of air flow.
In one possible implementation manner, along the airflow advancing direction, the nozzle section comprises a first nozzle section and a second nozzle section, the first nozzle section and the second nozzle section are respectively located at two sides of the power section, and a gas-solid injector, a material model and a dust removing device are sequentially connected between the first nozzle section and the second nozzle section.
In one possible implementation manner, the door sealing structure is connected with the wind tunnel body through a flange, the door sealing structure comprises a door frame and a revolving door, the revolving door is connected with the rotating handle through a connecting shaft, and the revolving door is driven to rotate through rotating the rotating handle.
In one possible implementation manner, a step structure is arranged at the junction of the outer edge of the revolving door and the door frame, the step structure comprises a first sheet metal part and a second sheet metal part, the distance between the first sheet metal part and the inner wall of the wind tunnel body is smaller than that between the first sheet metal part and the second sheet metal part, and a fixed block is arranged on the inner wall of the wind tunnel body.
In one possible implementation manner, a rubber pad is arranged between the first sheet metal part and the second sheet metal part.
In one possible embodiment, a sealing cover is provided on the outside of the flange.
In one possible implementation manner, a plurality of test sections are continuously arranged on the wind tunnel body, and movable connection is adopted among the plurality of tests.
In one possible implementation manner, the wind tunnel body is further provided with a contraction section, the contraction section is connected with one end of the test section, and the inner diameter of the inlet of the contraction section is larger than the inner diameter of the outlet of the contraction section along the airflow advancing direction.
In one possible implementation, a stabilizing section is disposed at a position upstream of the contraction section along the airflow advancing direction, and a honeycomb device and at least one layer of damping net are sequentially disposed in the stabilizing section along the airflow direction.
In one possible implementation, the honeycomb is made of stainless steel material.
In one possible implementation, a first diffuser section and a second diffuser section are provided at a downstream position of the test section and a downstream position of the power section, respectively, along the direction of airflow advancement.
In one possible implementation manner, the power section, the first diffusion section and the second diffusion section of the stabilizing section are all provided with access holes.
In one possible implementation, four corner positions of the wind tunnel body are respectively provided with corner sections, and guide vanes are arranged in the corner sections.
The technical scheme provided by the embodiment of the invention can comprise the following beneficial effects: the invention discloses a wind tunnel body comprising a back-shaped wind tunnel test simulation, such as a test of a pitot tube and an anemometer, wherein a spout section is arranged on the back-shaped wind tunnel body and used for connecting materials to be tested, wherein a material model to be tested can be connected with a single spout section for performing open environment test and a group of corresponding spout sections can be simultaneously connected for performing closed environment test.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as disclosed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic structural diagram of an experimental bin based on a material model for improving the power generation efficiency of coal according to an exemplary embodiment.
Fig. 2 is a schematic structural diagram of an experimental bin based on a material model for improving the power generation efficiency of coal according to an exemplary embodiment.
Fig. 3 is a schematic structural diagram of an experimental bin based on a material model for improving the power generation efficiency of coal according to an exemplary embodiment.
Fig. 4 is a schematic structural view of a door seal structure according to an exemplary embodiment.
Fig. 5 is a cross-sectional view taken along the direction A-A in fig. 4.
Fig. 6 is an enlarged view at C in fig. 5.
Fig. 7 is an enlarged view at B in fig. 4.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
Fig. 1 to 3 are block diagrams showing an environment experimental bin based on a material model for improving the power generation efficiency of coal according to an exemplary embodiment. Referring to fig. 1, a material model environment experiment bin based on improving coal power generation efficiency includes: the wind tunnel is characterized in that the wind tunnel is provided with at least a wind tunnel body 1 in a shape like a Chinese character 'hui' with a power section 3, the wind tunnel body 1 is provided with at least one group of corresponding nozzle sections, the nozzle sections are used for being connected with a material model to be tested, and a door sealing structure 2 is arranged at the downstream position of the nozzle sections along the advancing direction of air flow.
In the embodiment of the invention, the zigzag wind tunnel body comprises a closed wind tunnel structure with connected ends, and the shape of the wind tunnel body is not limited to the zigzag shape, but also can be annular, elliptic and the like, and is not limited herein. The wind tunnel body at least comprises a power section 3, wherein the power section 3 is used for providing a power source for the whole wind tunnel equipment to form airflows with different wind speeds, such as 0-30m/s of wind or 0-60m/s of wind. After the airflow is generated by the power section, the airflow flows to a preset direction, and along the airflow advancing direction, the downstream position refers to the position where the airflow is experienced at the next moment by taking the current position as a reference in the process of one airflow circulation. The material model comprises: in order to reduce energy loss and improve power generation efficiency, people manufacture a material model related to a pipeline connection structure of a power plant when carrying out pipeline design.
In the disclosed embodiment of the application, at least one group of corresponding nozzle segments are arranged on the wind tunnel body 1, as shown in fig. 1, the group of corresponding nozzle segments in the disclosed embodiment of the application comprises a first nozzle segment 4 and a second nozzle segment 5, the nozzle segments are used for being connected with a material model to be tested, in one example, as shown in fig. 3, the material model is connected between the first nozzle segment 4 and the second nozzle segment 5 and is simultaneously connected with the first nozzle segment 4 and the second nozzle segment 5, and a door sealing structure 2 at the downstream position of the nozzle segments is closed, at the moment, airflow from the power segment 3 sequentially passes through the first nozzle segment 4, the material model and the second nozzle segment 5 and then returns to the power segment 3, so as to form a closed loop circulation wind tunnel test environment. In another example, referring to fig. 2, the material model is only connected to the first nozzle section 4, the door sealing structure 2 is closed, and the air flow from the power section 3 sequentially passes through the first nozzle section 4 and the material model to form an open wind tunnel test environment. In another example, the nozzle section is not connected to the material model, and the door sealing structure 2 is in an open state, that is, the air flow can pass through the door sealing structure 2, and at this time, a small object with measurement, such as a pitot tube, an anemometer, etc., can be placed in the test section of the zigzag wind tunnel body for testing. Therefore, the material model experiment bin disclosed by the application has multiple functional purposes. It should be noted that, the installation manner of the nozzle segment is not limited to the above example, for example, the nozzle segment is installed on the vertical pipeline of the wind tunnel body 1, and different nozzle segments are selected to be used in combination according to actual needs, and other modifications are possible by those skilled in the art in light of the technical spirit of the present application, but all the functions and effects that are achieved are the same or similar to those of the present application are included in the protection scope of the present application.
The invention discloses a wind tunnel body comprising a back-shaped wind tunnel body, which is used for simulating a closed material model experiment bin, such as the test of a pitot tube and an anemometer, wherein a spout section is arranged on the back-shaped wind tunnel body and used for connecting materials to be tested, the material model to be tested can be connected with a single spout section for performing open environment experiment test, and a group of corresponding spout sections can be simultaneously connected for performing closed environment experiment test.
In a possible implementation manner, along the airflow advancing direction, the nozzle section comprises a first nozzle section 4 and a second nozzle section 5, the first nozzle section 4 and the second nozzle section 5 are respectively located at two sides of the power section 3, and a gas-solid injector 6, a material model 7 and a dust removing device 8 are sequentially connected between the first nozzle section 4 and the second nozzle section 5.
In the embodiment of the invention, a gas-solid sprayer 6, a material model 7 and a dust collector 8 are sequentially connected between the first nozzle section 4 and the second nozzle section 5, so that a powder spraying experiment (coal carbon powder) of the material model can be studied, the gas-solid sprayer 6 is conventional technical equipment and can be purchased, the spraying amount of the gas-solid sprayer 6 can be adjusted, and the dust collector is added at the rear end of the material model, so that sprayed powder can be absorbed, and the test environment is protected. According to the embodiment of the invention, the gas-solid sprayer 6 and the dust removing device 8 are added, so that the function of a powder spraying test is added on the basis of the original test type, and the functionality of an environment experiment bin is further expanded.
Fig. 4 is a schematic structural view of a door seal structure according to an exemplary embodiment. Reference is made to fig. 4. The door sealing structure 2 is connected with the wind tunnel body 1 through a flange 18, the door sealing structure 2 comprises a door frame 20 and a rotary door 21, the rotary door 21 is connected with a rotary handle 16 through a connecting shaft 17, and the rotary door 21 is driven to rotate through the rotary handle 16. When the revolving door is perpendicular to the paper surface direction and the airflow advancing direction is the same as the revolving door and is also perpendicular to the paper surface direction, the door sealing structure 2 is in an open state, and the airflow can circulate through the channel at the position. The public unsealing door is simple in structure and reasonable in design.
In one possible implementation manner, referring to fig. 5 and 6, a step structure is disposed at the junction between the outer edge of the revolving door 21 and the door frame 20, the step structure includes a first sheet metal part 22 and a second sheet metal part 23, a distance between the first sheet metal part 22 and the inner wall of the wind tunnel body 1 is smaller than a distance between the second sheet metal part 23, and a fixed block 25 is disposed on the inner wall of the wind tunnel body 1. The distance between the second sheet metal part 23 and the tail end of the first sheet metal part 22 is larger than that between the first sheet metal part 22, the second sheet metal part 23 and the tail end of the first sheet metal part 22 form a ladder-shaped structure of the tail end 21 of the revolving door, the revolving door 21 is fixed by a fixing block 25 to rotate, so that the revolving door 21 can stay at a fixed position, in one example, the other end of the revolving door 21 is fixed more firmly by using the ladder-shaped structure, and the revolving door can be well fixed no matter the air flow flows from left to right or from right to left as shown in fig. 5, so that the function of blocking the air flow is achieved.
In one possible implementation manner, a rubber gasket 24 is disposed between the first sheet metal part 22 and the second sheet metal part 23, and the sealing effect is enhanced by disposing the rubber gasket between the first sheet metal part 22 and the second sheet metal part 23.
In one possible implementation, referring to fig. 7, a sealing cover (19) is disposed on the outer side of the flange (18), so as to prevent the air flow from being scattered out of the structural connection between the flange and the wind tunnel body 1, and further enhance the sealing effect.
In one possible implementation manner, the wind tunnel body 1 is continuously provided with a plurality of test sections, such as a first test section 91, a second test section 92 and a third test section 93, and the plurality of test sections are movably connected. The test sections are movably connected, so that the installation of the environment experiment bin is facilitated, and the test sections are arranged to be movably connected, so that the installation and the use of the device are facilitated under certain special installation environments, such as a roof, because the test sections are too large in size and are not beneficial to transportation.
In a possible implementation manner, the wind tunnel body 1 is further provided with a contraction section 12, the contraction section 12 is connected with one end of the test section 9, and the inner diameter of the inlet of the contraction section 12 is larger than the inner diameter of the outlet of the contraction section 12 along the airflow advancing direction. The inlet inside diameter of the constriction 12 may comprise 1.25m and the outlet inside diameter of the constriction 12 may comprise 0.7m, the constriction 12 being able to accelerate the air flow uniformly to meet the wind speed required by the test section.
In one possible implementation, a stabilizing section 13 is provided at a position upstream of the constriction section 12 in the direction of advance of the air flow, in which stabilizing section a honeycomb and at least one layer of damping net are provided in sequence in the direction of the air flow. The damping net is woven by stainless steel wires, and the aperture ratio can comprise 64%. The honeycomb unit is a regular hexagonal honeycomb unit, the unit opposite side distance can comprise 16mm, and the unit length can comprise 220mm. The stabilizing sections can both accelerate the airflow, and the required wind speed of the test section is met.
In one possible implementation, the honeycomb is made of stainless steel material. The honeycomb device is used as main equipment for rectifying a wind tunnel flow field, the performance of the honeycomb device has great influence on flow field indexes, the conventional wind tunnel honeycomb device mostly adopts a glass fiber reinforced plastic structure, the structure is low in cost and not environment-friendly, broken powder is generated, the wire is rough, the structure appearance is easy to deform, and the flow field of a test section is influenced by differences among a plurality of regular hexagon holes. According to the embodiment of the invention, the stainless steel thin-wall honeycomb device is adopted, so that the resistance is small, the environment is protected, each regular hexagon honeycomb tube is manufactured through the die, the structural strength is high, the deformation is avoided, the consistency of a plurality of honeycomb tubes is ensured, the air flow is not disturbed, and the rectifying effect is good.
In one possible implementation, a first diffuser 14 and a second diffuser 15 are provided at a position downstream of the test section and downstream of the power section 3, respectively, in the direction of advance of the air flow. According to the embodiment of the invention, the first diffusion section 14 and the second diffusion section 15 are arranged in the important power section 3 and the test section, the diffusion sections restore the kinetic energy of the air flow into pressure energy, and the energy loss of each section of the air flow downstream of the diffusion sections is reduced.
In one possible implementation, the power section 3, the first diffusion section 14 and the second diffusion section 15 of the stabilizing section 13 are provided with access holes. The invention discloses a few positions needing frequent maintenance, such as a stabilizing section 13, a diffusing section, a power section 3 and the like, which are provided with overhaul holes, so that the detection and the maintenance are convenient. And the manhole can be arranged at other positions as required, and the embodiment disclosed by the invention is not limited.
In one possible implementation, corner sections 10 are respectively arranged at four corner positions of the wind tunnel body 1, and guide vanes 11 are arranged in the corner sections 10. According to the embodiment disclosed by the invention, the flow deflectors with different numbers are arranged in the corner section 10 to guide the air flow, so that the energy loss can be reduced, and the flow field quality can be improved.
Other embodiments of the disclosed application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosed application. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (8)
1. Material model environment experiment bin based on improve coal generating efficiency, its characterized in that includes: the wind tunnel comprises a wind tunnel body (1) which is provided with at least a back-shaped power section (3), wherein the wind tunnel body (1) is provided with at least one group of corresponding nozzle sections, the nozzle sections are used for being connected with a material model to be tested, and a door sealing structure (2) is arranged at the downstream position of the nozzle sections along the airflow advancing direction;
The door sealing structure (2) is connected with the wind tunnel body (1) through a flange (18), the door sealing structure (2) comprises a door frame (20) and a rotary door (21), the rotary door (21) is connected with a rotary handle (16) through a connecting shaft (17), and the rotary door (21) is driven to rotate by rotating the rotary handle (16);
The junction of the outer side edge of the revolving door (21) and the door frame (20) is provided with a step structure, the step structure comprises a first sheet metal part (22) and a second sheet metal part (23), the distance between the first sheet metal part (22) and the inner wall of the wind tunnel body (1) is smaller than the distance between the second sheet metal part (23), and the inner wall of the wind tunnel body (1) is provided with a fixed block (25); a rubber pad (24) is arranged between the first sheet metal part (22) and the second sheet metal part (23); the outer side of the flange (18) is provided with a sealing cover (19).
2. The environmental experiment bin according to claim 1, characterized in that the nozzle section comprises a first nozzle section (4) and a second nozzle section (5) along the airflow advancing direction, the first nozzle section (4) and the second nozzle section (5) are respectively positioned at two sides of the power section (3), and a gas-solid injector (6), a material model (7) and a dust removing device (8) are sequentially connected between the first nozzle section (4) and the second nozzle section (5).
3. Environmental experiment bin according to claim 1, characterized in that the wind tunnel body (1) is continuously provided with a plurality of test sections (9), and the test sections are movably connected.
4. An environmental test chamber according to claim 3, wherein the wind tunnel body (1) is further provided with a contraction section (12), the contraction section (12) is connected with one end of the test section (9), and the inner diameter of the inlet of the contraction section (12) is larger than the inner diameter of the outlet of the contraction section (12) along the advancing direction of the air flow.
5. Environmental test chamber according to claim 4, characterized in that a stabilizing section (13) is arranged upstream of the constriction section (12) in the direction of advance of the air flow, in which stabilizing section a honeycomb device and at least one layer of damping net are arranged in sequence in the direction of the air flow.
6. Environmental test cartridge according to claim 5, characterized in that a first diffuser section (14) and a second diffuser section (15) are provided, respectively, in the direction of advance of the air flow, in a position downstream of the test section and in a position downstream of the power section (3).
7. The environmental experiment bin according to claim 6, wherein the power section (3), the stabilizing section (13), the first diffusion section (14) and the second diffusion section (15) are provided with access holes.
8. Environmental experiment warehouse according to any one of claims 1 to 7, characterized in that the four corner positions of the wind tunnel body (1) are respectively provided with corner sections (10), and that the corner sections (10) are internally provided with guide vanes (11).
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| CN111307394B (en) * | 2020-03-09 | 2021-08-24 | 西南交通大学 | Multistage power controllable backflow type wind tunnel |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102053003A (en) * | 2009-10-28 | 2011-05-11 | 北京航空航天大学 | Multifunctional sand dust environment simulation device with changeable test section |
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| US7237434B2 (en) * | 2004-04-30 | 2007-07-03 | Daimlerchrysler Corporation | Slotted damping section for aerodynamic wind tunnel |
| DE102010060929A1 (en) * | 2010-12-01 | 2012-06-06 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Aero-acoustic wind tunnel has fan that is arranged in closed current return tube in which free cross-sectional area is suddenly changed according to specific amount of change in outer periphery of free cross-sectional area |
| JP6112302B2 (en) * | 2013-08-29 | 2017-04-12 | 株式会社大気社 | Wind tunnel experiment equipment |
| CN104280204B (en) * | 2014-09-28 | 2017-05-03 | 中车青岛四方机车车辆股份有限公司 | Wind tunnel |
| RU2603234C1 (en) * | 2015-06-18 | 2016-11-27 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный университет" (СПбГУ) | Subsonic wind tunnel with flow rate pulsing component |
| 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 |
| CN110333043B (en) * | 2019-05-20 | 2021-03-30 | 广东工业大学 | Convenient and small near-ground atmospheric boundary layer wind tunnel and application thereof in crowd risk exposure assessment |
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| CN102053003A (en) * | 2009-10-28 | 2011-05-11 | 北京航空航天大学 | Multifunctional sand dust environment simulation device with changeable test section |
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