Wind tunnel test equipment

Abstract

The present invention belongs to the technical field of aerodynamic tests, and specifically provides a wind tunnel test device, including a wind tunnel body, a fan, a rectifier assembly and a plurality of test assemblies. The wind tunnel body is composed of a power section, a rectifier section and a test section. The fan is arranged inside the power section, and the rectifier assembly is arranged inside the rectifier section. During the test, a uniform airflow can be generated to blow toward the test section. The present invention is provided with a connecting port at the bottom of the test section, and a bracket matched with the connecting port is arranged. The bracket is driven to move up and down in the vertical direction by a lifting mechanism, so that the bracket can switch between an idle position and a test position. In this way, on the one hand, when the bracket is in the idle position, the support plate is located outside the wind tunnel body, which is convenient for removing and fixing the test object. On the other hand, when it is necessary to test a plurality of test objects in combination, different test objects can be controlled to rise or fall by controlling the corresponding test assemblies, eliminating the operation of manual removal and fixing, and the operation is more convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of wind tunnels, and in particular relates to a wind tunnel test device. Background Art

[0002] Wind tunnels are test equipment built based on aerodynamics and are one of the most commonly used and effective tools for aerodynamic testing. The working principle of a wind tunnel is to artificially generate airflow with controllable speed and direction to simulate and observe the changes in airflow around an object. By simulating the wind pressure, wind load and airflow characteristics around an object, testers can provide a basis for the shape and structural design of the object.

[0003] There are many kinds of tests that can be conducted in wind tunnels. During wind tunnel tests, objects such as windbreaks, low buildings, photovoltaic panels, building complexes, bridges or building components, wind turbines, cars, embankments, and cuttings can be placed inside the wind tunnel. When the volume of the wind tunnel is small, proportional miniature models of the above objects can be placed inside the wind tunnel. Using high-precision miniature models as objects can also achieve the expected test results.

[0004] When conducting a wind tunnel test, the test object (such as a house model, a car model, etc.) needs to be fixed inside the wind tunnel. In the prior art, the installation of the test object is all done manually, so when it is necessary to switch between multiple test objects, it is necessary to rely on manual replacement and fixation. The shortcomings of this method are: 1. In the prior art, the installation of the test object is all done inside the wind tunnel. For small wind tunnels in the laboratory, the operable space is small, and it is inconvenient for operators to remove and fix the test objects. 2. When it is necessary to conduct a combined test on multiple test objects (for example, to verify the airflow conditions when a windbreak is installed and not installed in front of a low building), one test requires test personnel to remove and fix multiple objects separately, which takes a long time and affects the test efficiency. Summary of the invention

[0005] The present invention provides a wind tunnel test device, aiming to solve the problems in the prior art that the installation of test objects is carried out inside the wind tunnel, which causes inconvenience for small wind tunnels due to the small operating space; and when conducting a combined test of multiple test objects, the multiple test objects rely on manual removal and fixation when switching, which takes a long time to operate.

[0006] To achieve the above object, the technical solution adopted by the present invention is: to provide a wind tunnel test device, comprising:

[0007] A wind tunnel body, the wind tunnel body comprising a power section, a rectifying section and a test section arranged in sequence along the airflow direction, a plurality of communication openings are opened at the bottom of the test section, and the plurality of communication openings are arranged at intervals along the airflow direction;

[0008] A fan, wherein the fan is arranged in the power section;

[0009] A rectifying assembly, the rectifying assembly comprising a damping net and a honeycomb plate, the damping net and the honeycomb plate being arranged at intervals in the rectifying section along the airflow direction; and

[0010] A plurality of test components, each of the test components corresponds to the communication port one by one, the test components include a bracket and a lifting mechanism, the bracket includes a sealing plate, a connecting rod and a support plate, the support plate is located below the sealing plate, the upper surface of the support plate is used for placing the test object, and the connecting rod is arranged between the sealing plate and the support plate; the bracket has an idle position and a test position, when in the idle position, the sealing plate is sealingly matched with the corresponding communication port, when in the test position, the support plate is sealingly matched with the corresponding communication port, the sealing plate abuts against the upper surface of the inner cavity of the test section, and the lifting mechanism is used to drive the bracket to move between the idle position and the test position.

[0011] In a possible implementation, the wind tunnel test device further includes a smoke generating section, which is arranged between the rectifying section and the test section; the wind tunnel test device further includes a smoke generator, which is used to provide smoke into the smoke generating section.

[0012] In a possible implementation, the smoke generator includes:

[0013] A smoke chamber, arranged on one side of the smoke generating section;

[0014] A smoke generating unit is arranged inside the smoke chamber and is used to generate smoke;

[0015] A plurality of smoke conveying pipes, one end of which is connected to the smoke bin and the other end of which extends horizontally to the inside of the smoke generating section, and the plurality of smoke conveying pipes located inside the smoke generating section are arranged in an upper and lower interval; and

[0016] The smoke delivery fan is arranged inside the smoke bin and is used for delivering smoke to the smoke delivery pipe.

[0017] In a possible implementation, the smoke generator further includes an adjusting mechanism, which is disposed on one side of the smoke generating section and is used to drive the smoke chamber to move in a vertical direction.

[0018] In a possible implementation, a trumpet-shaped expansion section is provided on the air inlet side of the power section, and an interception net is provided at the entrance of the expansion section.

[0019] In a possible implementation, in the airflow direction, at least one damping net is provided behind the honeycomb panel, and the damping net includes two net frames, the net frames are square frame structures, and the net frames have multiple damping wires covering their own inner holes. The multiple damping wires on the same net frame are parallel to each other, and the damping wires of the two net frames are vertically crossed.

[0020] In a possible implementation, the network frame includes:

[0021] The frame is square in shape, and the interior of the frame is hollow;

[0022] A plurality of first wheel bodies are arranged on one side wall of the frame body, the plurality of first wheel bodies are arranged at intervals along the length direction of the frame body, and the axial direction of the first wheel bodies is parallel to the opening direction of the frame body;

[0023] A plurality of second wheel bodies are arranged on the other side wall opposite to the frame body, the plurality of second wheel bodies are arranged at intervals along the length direction of the frame body, and the axial direction of the second wheel bodies is parallel to the opening direction of the frame body;

[0024] A wire body, one end of which is fixedly connected to the frame body, and the other end of which is a free end, and the free end of which is sequentially wound around the first wheel body and the second wheel body to form a plurality of damping wires covering the inner hole of the frame body; and

[0025] The tensioning mechanism comprises a guide sleeve, an adjusting ring, a spring and a locking plate. The guide sleeve is arranged on the frame and has a guide hole for the free end of the wire body to pass through. The outer periphery of the guide sleeve has an external thread. The adjusting ring cooperates with the outer peripheral thread of the guide sleeve. The locking plate is fixedly connected to the free end of the wire body. The spring is arranged between the locking plate and the adjusting ring and is configured with a pre-tightening force that keeps the locking plate and the adjusting ring away from each other.

[0026] In a possible implementation, the wind tunnel test device also includes a weather simulation mechanism, which includes a funnel. The funnel is arranged above the test section, the discharge end of the funnel is connected to the inner cavity of the test section, and the discharge end of the funnel is provided with a discharge control valve.

[0027] In a possible implementation, the wind tunnel test device further includes a terrain simulation mechanism, which is disposed on the support plate of one of the test assemblies, and a mounting groove is provided on the upper surface of the support plate, and the terrain simulation mechanism includes:

[0028] A flexible sleeve is disposed above the installation groove, and the flexible sleeve has a road bank shape protruding from the installation groove and a road cutting shape recessed inside the installation groove; and

[0029] A lifting rod is vertically upwardly arranged in the installation groove, the top end of the lifting rod is connected to the flexible sleeve, and the lifting rod is used to drive the flexible sleeve to switch between the embankment form and the cutting form.

[0030] In a possible implementation, the wind tunnel test device further includes a building complex simulation mechanism, which is disposed on the support plate of one of the test assemblies, and the building complex simulation mechanism includes:

[0031] A turntable, rotatably disposed on the corresponding support plate around an axis in a vertical direction; and

[0032] The building complex model is arranged on the upper surface of the turntable.

[0033] Compared with the prior art, the wind tunnel test device provided by the present invention has the following beneficial effects:

[0034] The wind tunnel test device provided by the present invention includes a wind tunnel body, a fan, a rectifier assembly and a plurality of test assemblies. The wind tunnel body is composed of a power section, a rectifier section and a test section. The fan is arranged inside the power section, and the rectifier assembly is arranged inside the rectifier section. During the test, a uniform airflow can be generated to blow toward the test section. A plurality of connecting ports are provided at the bottom of the test section. The connecting ports are slidably matched with a liftable bracket. The bracket includes a sealing plate located at the top, a support plate located at the bottom, and a connecting rod connected between the sealing plate and the support plate. Before the test, the bracket is in an idle position, and the support plate is located below the test section. The operator can fix the object to be tested on the support plate, and then the lifting mechanism drives the bracket to rise until the sealing plate abuts against the top wall of the test section. At this time, the support plate is flush with the bottom wall of the test section, and the test object (such as a house model) is located inside the test section of the wind tunnel body.

[0035] The present invention provides a connecting port at the bottom of the test section, and sets a bracket matched with the connecting port. The bracket is driven to move up and down in the vertical direction by a lifting mechanism, so that the bracket can switch between the idle position and the test position. In this way, on the one hand, when the bracket is in the idle position, the support plate is located outside the wind tunnel body, which is more convenient for operators to remove and fix the test objects, providing convenience for operators. On the other hand, multiple test components can be independently controlled to rise or fall. When multiple test objects need to be tested in combination, different test objects can be controlled to rise or fall by controlling the corresponding test components, eliminating the manual removal and fixing operations, making the operation more convenient and helping to improve the test efficiency. When the bracket is in the idle position, the sealing plate at the top can seal the connecting port without causing airflow leakage. When the bracket is in the test position, the support plate at the bottom can seal the connecting port, and the sealing plate at the top abuts against the top wall of the test section, which will not interfere with the airflow inside the test section, helping to ensure the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A three-dimensional diagram of a wind tunnel test device provided by an embodiment of the present invention when the bracket is in a test position;

[0037] Figure 2 for Figure 1 A three-dimensional cross-sectional view of

[0038] Figure 3 A three-dimensional diagram of a wind tunnel test device provided by an embodiment of the present invention when the bracket is in an idle position;

[0039] Figure 4 It is a three-dimensional diagram of a support plate, a windbreak net simulation mechanism, a low building simulation mechanism, a building group simulation mechanism, a building bridge component simulation mechanism, a car simulation mechanism and a terrain simulation mechanism;

[0040] Figure 5 It is a structural schematic diagram of the flexible sleeve of the terrain simulation mechanism in the form of an embankment;

[0041] Figure 6 It is a structural schematic diagram of the flexible sleeve of the terrain simulation mechanism in the form of a road cutting;

[0042] Figure 7 It is a structural schematic diagram of the damping net in an embodiment of the present invention;

[0043] Figure 8 It is a schematic diagram of the structure of the screen frame in an embodiment of the present invention;

[0044] Fig. 9 for Figure 8 A partial enlarged view of part A in the middle.

[0045] Description of reference numerals:

[0046] 10. Wind tunnel body; 11. Power section; 111. Expanding section; 12. Rectification section; 13. Test section; 131. Connecting port; 14. Smoke generating section; 15. Wind tunnel bracket;

[0047] 20. Fan;

[0048] 30. Rectification assembly; 31. Damping net; 311. Frame; 312. First wheel body; 313. Second wheel body; 314. Line body; 315. Tensioning mechanism; 3151. Guide sleeve; 3152. Adjusting ring; 3153. Spring; 3154. Locking piece; 32. Honeycomb panel;

[0049] 40. Test assembly; 41. Bracket; 411. Closing plate; 412. Connecting rod; 413. Support plate; 42. Lifting mechanism;

[0050] 50. Smoke generator; 51. Smoke chamber; 52. Smoke delivery pipe;

[0051] 60. Funnel;

[0052] 70. Terrain simulation mechanism; 71. Flexible sleeve; 72. Lifting rod;

[0053] 80. Building complex simulation mechanism; 81. Windbreak net simulation mechanism; 82. Low-rise building simulation mechanism; 821. Photovoltaic panel model; 83. Building bridge component simulation mechanism; 84. Automobile simulation mechanism; DETAILED DESCRIPTION

[0054] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0055] It should be noted that when an element is referred to as being "fixed to", "fixed" or "fixedly disposed" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" or "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When an element is referred to as being "set to" or "disposed on" another element, it may be directly on the other element or there may be a central element. "Multiple" refers to two or more quantities. "At least one" refers to one or more quantities. "Several" refers to one or more quantities.

[0056] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0057] Please also read Figures 1 to 9 , the wind tunnel test device provided in an embodiment of the present invention is described below.

[0058] See also Figures 1 to 3The wind tunnel test device provided by the embodiment of the present invention includes a wind tunnel body 10, a fan 20, a rectifying assembly 30 and a test assembly 40. The wind tunnel body 10 includes a power section 11, a rectifying section 12 and a test section 13 which are sequentially arranged along the airflow direction. A plurality of connecting ports 131 are provided at the bottom of the test section 13, and the plurality of connecting ports 131 are arranged at intervals along the airflow direction; the fan 20 is arranged at the power section 11; the rectifying assembly 30 includes a damping net 31 and a honeycomb panel 32, and the damping net 31 and the honeycomb panel 32 are arranged at intervals along the airflow direction at the rectifying section 12; a plurality of test assemblies 40 correspond to the connecting ports 131 one by one, and the test assembly 40 includes a bracket 41 and a lifting mechanism 42, and the bracket 41 includes a sealing plate 411, a connecting plate 412 and a connecting plate 413; The connecting rod 412 and the support plate 413, the support plate 413 is located below the sealing plate 411, the upper surface of the support plate 413 is used to place the test object, and the connecting rod 412 is arranged between the sealing plate 411 and the support plate 413; the bracket 41 has an idle position and a test position, when in the idle position, the sealing plate 411 is sealed and matched with the corresponding connecting port 131, when in the test position, the support plate 413 is sealed and matched with the corresponding connecting port 131, the sealing plate 411 abuts against the upper surface of the inner cavity of the test section 13, and the lifting mechanism 42 is used to drive the bracket 41 to move between the idle position and the test position.

[0059] Compared with the prior art, the wind tunnel test device provided by the embodiment of the present invention has the following beneficial effects:

[0060] The wind tunnel test device provided by the embodiment of the present invention comprises a wind tunnel body 10, a fan 20, a rectifier assembly 30 and a plurality of test assemblies 40. The wind tunnel body 10 is composed of a power section 11, a rectifier section 12 and a test section 13. The fan 20 is arranged inside the power section 11, and the rectifier assembly 30 is arranged inside the rectifier section 12. During the test, a uniform airflow can be generated to blow toward the test section 13. A plurality of communication ports 131 are provided at the bottom of the test section 13. The communication ports 131 are slidably matched with a liftable bracket 41. The bracket 41 comprises a sealing plate 411 located at the top, a supporting plate 413 located at the bottom, and a connecting rod 412 connected between the sealing plate 411 and the supporting plate 413. Before the test, the bracket 41 is in an idle position and the support plate 413 is located below the test section 13. The operator can fix the object to be tested on the support plate 413, and then the lifting mechanism 42 drives the bracket 41 to rise until the sealing plate 411 abuts against the top wall of the test section 13. At this time, the support plate 413 is flush with the bottom wall of the test section 13, and the test object (such as a house model) is located inside the test section 13 of the wind tunnel body 10.

[0061] In the embodiment of the present invention, a connecting port 131 is provided at the bottom of the test section 13, and a bracket 41 is provided to cooperate with the connecting port 131. The bracket 41 is driven to move up and down in the vertical direction by the lifting mechanism 42, so that the bracket 41 can switch between the idle position and the test position. In this way, on the one hand, when the bracket 41 is in the idle position, the support plate 413 is located outside the wind tunnel body 10, which makes it more convenient for operators to remove and fix the test objects, providing convenience for operators. On the other hand, multiple test assemblies 40 can be independently controlled to rise and fall. When multiple test objects need to be tested in combination, different test objects can be controlled to rise or fall by controlling the corresponding test assemblies 40, eliminating the need for manual removal and fixing operations (for example, the windproof net simulation mechanism 81 located in front of the low building simulation mechanism 82 can be controlled to rise and fall to test the windproof effect of the windproof net), making the operation more convenient and also helping to improve the test efficiency. When the bracket 41 is in the idle position, the sealing plate 411 at the top can seal the connecting port 131 without causing airflow leakage. When the bracket 41 is in the test position, the bottom support plate 413 can seal the connecting port 131, and the top sealing plate 411 abuts against the top wall of the test section 13 without interfering with the airflow inside the test section 13, which helps to ensure the accuracy of the test.

[0062] The shape of the wind tunnel body 10 in the embodiment of the present invention is a common wind tunnel shape such as a straight cylinder, annular or semi-annular shape. The wind tunnel body 10 is formed by the power section 11, the rectification section 12 and the test section 13 connected in sequence. The power section 11, the rectification section 12 and the test section 13 are all supported by the wind tunnel bracket 15. The power section 11, the rectification section 12 and the test section 13 are all made of thin steel plates and connected to each other by fasteners such as bolts. The cross-sectional shapes of the power section 11, the rectification section 12 and the test section 13 can be circular, square, etc. In order to reduce the airflow resistance and prevent the generation of vortices, the inner walls of the power section 11, the rectification section 12 and the test section 13 should be as smooth as possible.

[0063] The fan 20 is installed inside the power section 11. The fan 20 can be directly selected from existing products on the market, and there is no restriction on its specific specifications and models.

[0064] The rectifier assembly 30 includes a damping net 31 and a honeycomb panel 32. The damping net 31 and the honeycomb panel 32 can be directly selected from products with suitable specifications and models available on the market. One or more damping nets 31 and honeycomb panels 32 can be provided as required. Specifically, Figure 2 As shown, two layers of damping nets 31 and one layer of honeycomb panels 32 are provided in the rectifying section 12 . The damping nets 31 and the honeycomb panels 32 rectify the air with vortices of different sizes provided by the power section 11 , align the airflow into a straight and smooth one, and then flow to the test section 13 .

[0065] In order to facilitate cleaning of the damping net 31 and the honeycomb panel 32 , the damping net 31 and the honeycomb panel 32 may be designed to be removable, so as to facilitate removal and installation.

[0066] The structures of the multiple test assemblies 40 are the same, and the difference lies in the installation position and the test objects installed therein. Figure 4 As shown, the user can install different types of object models on different test assemblies 40 as needed, such as a windbreak net simulation mechanism 81, a low-rise building simulation mechanism 82, a building group simulation mechanism 80, a building bridge component simulation mechanism 83, a car simulation mechanism 84, and a terrain simulation mechanism 70. A photovoltaic panel model 821 can be set on the roof of the low-rise building simulation mechanism 82, and the installation inclination angle of the photovoltaic panel model 821 can be adjusted to test the wind load of the photovoltaic panel.

[0067] The test assembly 40 includes a bracket 41 and a lifting mechanism 42. The bracket 41 includes a sealing plate 411, a connecting rod 412 and a support plate 413. The sealing plate 411 and the support plate 413 are both parallel plates. The connecting rod 412 is vertically connected between the sealing plate 411 and the support plate 413. The connecting rod 412 can be a round rod and is set at the edge position as much as possible to minimize disturbance to the airflow, which helps to ensure the test accuracy.

[0068] When the bracket 41 is in the idle position, the sealing plate 411 is as shown in FIG. Figure 3 As shown in the figure, the support plate 413 is located at the position of the connecting port 131 and is used to close the connecting port 131. The support plate 413 is located outside the wind tunnel body 10, which is more convenient for operators to install or remove the test model. Figure 2 The position of the connecting port 131 shown can close the connecting port 131, and at the same time, the test object supported by it is inside the test section 13, which is used for airflow testing. The sealing plate 411 abuts against the top wall of the test section 13, and will not interfere with the airflow, thereby ensuring the accuracy of the test. In order to improve the airtightness of the test section 13, the side walls of the supporting plate 413 and the sealing plate 411 that cooperate with the connecting port 131 can be provided with one or more sealing elements such as sealing rubber rings, and the sealing elements such as sealing rubber rings are used to seal with the connecting port 131.

[0069] The lifting mechanism 42 is used to drive the bracket 41 to move in the vertical direction. The lifting mechanism 42 can specifically adopt a mechanical device capable of realizing vertical reciprocating motion, such as a screw lift, an electric telescopic rod, a hydraulic lifting cylinder, a gear rack mechanism, etc.

[0070] See also Figure 2 and Figure 3In some possible embodiments, the wind tunnel test device also includes a smoke generating section 14, which is arranged between the rectifying section 12 and the test section 13; the wind tunnel test device also includes a smoke generator 50, which is used to provide smoke to the inside of the smoke generating section 14.

[0071] In this embodiment, the smoke generator 50 is used to provide a smoke flow beam to the smoke generating section 14. The smoke has a color (such as white, green, etc.), so that the test personnel can intuitively understand the flow of the airflow.

[0072] See also Figure 2 and Figure 3 In some possible embodiments, the smoke generator 50 includes a smoke chamber 51, a smoke generating unit, a plurality of smoke conveying pipes 52, and a smoke conveying fan. The smoke chamber 51 is disposed on one side of the smoke generating section 14; the smoke generating unit is disposed inside the smoke chamber 51 for generating smoke; one end of the smoke conveying pipe 52 is connected to the smoke chamber 51, and the other end extends horizontally to the inside of the smoke generating section 14; the plurality of smoke conveying pipes 52 inside the smoke generating section 14 are arranged at intervals up and down; the smoke conveying fan is disposed inside the smoke chamber 51 for conveying smoke to the smoke conveying pipe 52.

[0073] In this embodiment, a smoke generating unit is provided inside the smoke chamber 51, and the smoke generating unit can generate smoke by heating the smoke oil with an electric heating wire. The side wall of the smoke chamber 51 is provided with a plurality of mounting holes for installing the smoke delivery pipe 52. The smoke is driven by an adjustable speed smoke delivery fan to allow smoke to flow into the smoke delivery pipe 52. Each smoke delivery pipe 52 is provided with an independent control switch for controlling the opening and closing of the pipe, thereby controlling the number of smoke roots entering the wind tunnel body 10. A smoke concentration detection probe can be installed in the smoke chamber 51, and the smoke generating unit automatically sprays smoke after the smoke concentration reaches the set lower limit. A heating wire can be wound around the outside of the smoke delivery pipe 52, and a temperature monitor can be installed to prevent condensation of droplets.

[0074] In some possible embodiments, in order to adjust the height of the smoke to adapt to different wind tunnel sizes and model heights, the smoke generator 50 further includes an adjustment mechanism, which is disposed on one side of the smoke generating section 14 and is used to drive the smoke chamber 51 to move in the vertical direction. The adjustment mechanism may specifically be a lifting cylinder, a scissor lift, or the like.

[0075] See also Figure 1 and Figure 2 In order to allow the airflow to enter the wind tunnel smoothly, a trumpet-shaped expansion section 111 is provided on the air inlet side of the power section 11. In order to prevent foreign matter from entering the wind tunnel and causing damage to the equipment, an interception net is provided at the entrance of the expansion section 111. The interception net can be made of metal wire mesh or nylon wire mesh, and one or more layers can be provided as needed.

[0076] See also Figure 2 In some possible embodiments, at least one damping net 31 is provided in front of the honeycomb panel 32, and at least one damping net 31 is provided behind the honeycomb panel 32. The damping net 31 includes two net frames. The net frames are square frame bodies 311 structures. The net frames have multiple damping wires covering their own inner holes. The multiple damping wires on the same net frame are parallel to each other, and the damping wires of the two net frames are vertically crossed.

[0077] In this embodiment, the damping net 31 is formed by overlapping two net frames, each of which has a plurality of damping wires arranged in parallel. The damping wires of the two net frames are arranged vertically and crosswise to form square mesh holes to rectify the passing airflow.

[0078] The damping net 31 is a main rectifying device in the rectifying section 12. In order to ensure the uniformity and turbulence of the airflow entering the test section 13, a multi-layer damping net 31 is usually set in the rectifying section 12 to divide the larger vortices of the airflow, thereby reducing the turbulence of the airflow. Since the damping net 31 will continue to bear the load along the airflow direction during use, it is easy to loosen after long-term use. Loosening will cause problems such as changes in mesh size and deterioration of the flatness of the damping net 31, thereby affecting the uniformity of the wind tunnel flow field. Therefore, it is necessary to set a tensioning device to adjust the tension of the damping wire of the damping net 31.

[0079] See also Figure 7 , Figure 8 and Fig. 9In some possible embodiments, the net frame includes a frame body 311, a plurality of first wheel bodies 312, a plurality of second wheel bodies 313, a wire body 314 and a tensioning mechanism 315. The frame body 311 is square, and the interior of the frame body 311 is hollow; a plurality of first wheel bodies 312 are arranged on one side wall of the frame body 311, and the plurality of first wheel bodies 312 are arranged at intervals along the length direction of the frame body 311, and the axial direction of the first wheel body 312 is parallel to the opening direction of the frame body 311; a plurality of second wheel bodies 313 are arranged on the other side wall opposite to the frame body 311, and the plurality of second wheel bodies 313 are arranged at intervals along the length direction of the frame body 311, and the axial direction of the second wheel body 313 is parallel to the opening direction of the frame body 311; one end of the wire body 314 is fixedly connected to the frame body 311, and the other end is a free end, and the free end of the wire body 314 is sequentially wound around the first wheel body 312 and the second wheel body 313. The second wheel body 313 is used to form a plurality of damping wires covering the inner hole of the frame body 311; the tensioning mechanism 315 includes a guide sleeve 3151, an adjusting ring 3152, a spring 3153 and a locking plate 3154. The guide sleeve 3151 is arranged on the frame body 311 and has a guide hole for the free end of the wire body 314 to pass through. The outer periphery of the guide sleeve 3151 has an external thread. The adjusting ring 3152 cooperates with the outer peripheral thread of the guide sleeve 3151. The locking plate 3154 is fixedly connected to the free end of the wire body 314. The spring 3153 is arranged between the locking plate 3154 and the adjusting ring 3152 and is configured with a preload force that keeps the locking plate 3154 and the adjusting ring 3152 away from each other.

[0080] In this embodiment, the wire 314 can be a metal wire. Figure 8 The manner shown is wound around the first and second wheels 312 and 313 to form multiple parallel damping wires. The free end of the wire 314 is connected to a tensioning mechanism 315. By rotating the adjusting ring 3152, the preload of the spring 3153 can be adjusted, thereby changing the tension of the wire 314.

[0081] As required, when the length of a single wire 314 is not enough to cover the entire frame 311 , multiple wires 314 may be provided, and a tensioning mechanism 315 is required to be provided at the free end of each wire 314 .

[0082] See also Figure 1 and Figure 3 In some possible embodiments, the wind tunnel test device also includes a weather simulation mechanism, which includes a funnel 60. The funnel 60 is arranged above the test section 13. The discharge end of the funnel 60 is connected to the inner cavity of the test section 13. The discharge end of the funnel 60 is provided with a discharge control valve.

[0083] The funnel 60 can be filled with water, fine sand, snow, etc. to simulate rain, snow, and sandstorm weather. The discharge control valve can be a common valve body such as a plug valve and an ash discharge valve.

[0084] See also Figure 4 , Figure 5 and Figure 6 In some possible embodiments, the wind tunnel test device further includes a terrain simulation mechanism 70, which is arranged on a support plate 413 of one of the test assemblies 40, and a mounting groove is provided on the upper surface of the support plate 413. The terrain simulation mechanism 70 includes a flexible sleeve 71 and a lifting rod 72. The flexible sleeve 71 is covered on the top of the mounting groove, and the flexible sleeve 71 is made of a deformable material such as rubber. The flexible sleeve 71 has a road bank shape protruding from the mounting groove, and a road cut shape recessed inside the mounting groove; the lifting rod 72 is vertically upwardly arranged in the mounting groove, and can be driven by an electric or pneumatic drive. The top end of the lifting rod 72 is connected to the flexible sleeve 71, and the lifting rod 72 is used to drive the flexible sleeve 71 to switch between the road bank shape and the road cut shape to simulate different terrain conditions.

[0085] A sand-proof tent, a snow-proof tent, etc. may be provided in front of the terrain simulation mechanism 70 to test the protective effect of the sand-proof tent and the snow-proof tent.

[0086] See also Figure 4 In some possible embodiments, the wind tunnel test device further includes a building complex simulation mechanism 80, which is disposed on a support plate 413 of one of the test assemblies 40. The building complex simulation mechanism 80 includes a turntable and a building complex model. The turntable is rotatably disposed on the corresponding support plate 413 around a vertical axis. The building complex model is disposed on the upper surface of the turntable and can rotate with the turntable to change the orientation of the building complex model and simulate the impact of wind from different directions on the building complex. The building complex model is used to simulate a real building complex, and an Irwin probe can be arranged around the building complex model to perform pedestrian wind environment testing.

[0087] It can be understood that the various parts in the above-mentioned embodiments can be freely combined or deleted to form different combination embodiments. The specific contents of each combination embodiment will not be repeated here. After this description, it can be considered that the specification of the present invention has recorded various combination embodiments and can support different combination embodiments.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wind tunnel test device, characterized in that: include: A wind tunnel body (10), the wind tunnel body (10) comprising a power section (11), a rectifying section (12) and a test section (13) arranged in sequence along an airflow direction, a plurality of communication openings (131) being provided at a bottom of the test section (13), the plurality of communication openings (131) being arranged at intervals along the airflow direction; a fan (20), the fan (20) being arranged in the power section (11); A rectifying assembly (30), the rectifying assembly (30) comprising a damping net (31) and a honeycomb plate (32), the damping net (31) and the honeycomb plate (32) being arranged at intervals on the rectifying section (12) along an airflow direction; and A plurality of test assemblies (40), wherein the test assemblies (40) correspond one to one with the communication ports (131), the test assemblies (40) comprising a bracket (41) and a lifting mechanism (42), the bracket (41) comprising a sealing plate (411), a connecting rod (412) and a supporting plate (413), the supporting plate (413) being located below the sealing plate (411), the upper surface of the supporting plate (413) being used for placing a test object, the connecting rod (412) being provided between the sealing plate (411) and the connecting rod (412). The support plate (413) is between the support plate (413); the support plate (41) has an idle position and a test position. When in the idle position, the sealing plate (411) is sealed and matched with the corresponding communication port (131). When in the test position, the support plate (413) is sealed and matched with the corresponding communication port (131). The sealing plate (411) abuts against the upper surface of the inner cavity of the test section (13). The lifting mechanism (42) is used to drive the support plate (41) to move between the idle position and the test position.

2. The wind tunnel test device according to claim 1, characterized in that: The wind tunnel test device further comprises a smoke generating section (14), wherein the smoke generating section (14) is arranged between the rectifying section (12) and the test section (13); the wind tunnel test device further comprises a smoke generator (50), wherein the smoke generator (50) is used to provide smoke into the interior of the smoke generating section (14).

3. The wind tunnel test device according to claim 2, characterized in that: The smoke generator (50) comprises: A smoke chamber (51) is arranged on one side of the smoke generating section (14); A smoke generating unit, disposed inside the smoke chamber (51) and used for generating smoke; a plurality of smoke conveying pipes (52), one end of the smoke conveying pipe (52) being connected to the smoke bin (51), and the other end of the smoke conveying pipe (52) extending horizontally to the interior of the smoke generating section (14), the plurality of smoke conveying pipes (52) located inside the smoke generating section (14) being arranged at intervals in the upper and lower parts; and A smoke delivery fan is arranged inside the smoke bin (51) and is used to deliver smoke to the smoke delivery pipe (52).

4. The wind tunnel test device according to claim 3, characterized in that: The smoke generator (50) further comprises an adjusting mechanism, which is arranged on one side of the smoke generating section (14) and is used to drive the smoke chamber (51) to move in a vertical direction.

5. The wind tunnel test device according to claim 1, characterized in that: A trumpet-shaped expansion section (111) is provided on the air inlet side of the power section (11), and an interception net is provided at the entrance of the expansion section (111).

6. The wind tunnel test device according to claim 1, characterized in that: In the airflow direction, at least one damping net (31) is provided behind the honeycomb panel (32), the damping net (31) comprising two net frames, the net frames being square frame bodies (311) in structure, the net frames having a plurality of damping wires covering their own inner holes, the plurality of damping wires on the same net frame being parallel to each other, and the damping wires of the two net frames being arranged vertically and crosswise.

7. The wind tunnel test device according to claim 6, characterized in that: The network frame comprises: The frame (311) is square in shape, and the interior of the frame (311) is hollow; A plurality of first wheel bodies (312) are arranged on one side wall of the frame body (311), the plurality of first wheel bodies (312) are arranged at intervals along the length direction of the frame body (311), and the axial direction of the first wheel bodies (312) is parallel to the opening direction of the frame body (311); A plurality of second wheel bodies (313) are arranged on the other side wall opposite to the frame body (311), the plurality of second wheel bodies (313) are arranged at intervals along the length direction of the frame body (311), and the axial direction of the second wheel bodies (313) is parallel to the opening direction of the frame body (311); a wire body (314), one end of the wire body (314) being fixedly connected to the frame body (311), and the other end being a free end, the free end of the wire body (314) being sequentially wound around the first wheel body (312) and the second wheel body (313) to form a plurality of damping wires covering the inner hole of the frame body (311); and A tensioning mechanism (315), the tensioning mechanism (315) comprising a guide sleeve (3151), an adjusting ring (3152), a spring (3153) and a locking plate (3154); the guide sleeve (3151) is arranged on the frame (311) and has a guide hole for the free end of the wire body (314) to pass through; the outer periphery of the guide sleeve (3151) has an external thread; the adjusting ring (3152) cooperates with the outer periphery of the guide sleeve (3151) thread; the locking plate (3154) is fixedly connected to the free end of the wire body (314); the spring (3153) is arranged between the locking plate (3154) and the adjusting ring (3152) and is provided with a pre-tightening force for keeping the locking plate (3154) and the adjusting ring (3152) away from each other.

8. The wind tunnel test device according to claim 1, characterized in that: The wind tunnel test device further comprises a weather simulation mechanism, wherein the weather simulation mechanism comprises a funnel (60), wherein the funnel (60) is arranged above the test section (13), wherein a discharge end of the funnel (60) is connected to an inner cavity of the test section (13), and a discharge control valve is arranged at the discharge end of the funnel (60).

9. The wind tunnel test device according to claim 1, characterized in that: The wind tunnel test device further comprises a terrain simulation mechanism (70), wherein the terrain simulation mechanism (70) is arranged on the support plate (413) of one of the test assemblies (40), and a mounting groove is provided on the upper surface of the support plate (413). The terrain simulation mechanism (70) comprises: A flexible sleeve (71) is disposed above the installation groove, the flexible sleeve (71) having a road bank shape protruding from the installation groove, and a road cutting shape recessed inside the installation groove; and A lifting rod (72) is vertically upwardly arranged in the installation groove, the top end of the lifting rod (72) is connected to the flexible sleeve (71), and the lifting rod (72) is used to drive the flexible sleeve (71) to switch between the embankment form and the cutting form.

10. The wind tunnel test device according to claim 1, characterized in that: The wind tunnel test device further comprises a building complex simulation mechanism (80), wherein the building complex simulation mechanism (80) is arranged on the support plate (413) of one of the test assemblies (40), and the building complex simulation mechanism (80) comprises: A turntable, rotatably arranged on the corresponding support plate (413) around an axis in a vertical direction; and The building complex model is arranged on the upper surface of the turntable.

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