A tornado wind tunnel with adjustable ascending channel height

Abstract

The present invention discloses a tornado wind tunnel with an adjustable ascending channel height, comprising a movable platform and a deflector assembly, an airflow ascending section, and a fan section mounted on the movable platform. The rotatable and adjustable deflectors of the deflector assembly are arranged circumferentially along the airflow ascending section. The output port of the deflector assembly is connected to the input port of the airflow ascending section, and the input port of the fan section is connected to the output port of the airflow ascending section. An air inlet control assembly for blocking the radial air inlet area is installed at the input port or the output port of the deflector assembly. The present invention simulates the horizontal movement of a tornado on the ground by mounting the deflector assembly, the airflow ascending section, and the fan section on a movable platform. By adjusting the rotation angle of the deflector and the radial air inlet area of ​​the input port or the output port of the deflector assembly, tornado wind fields with different swirl ratios can be simulated.

Description

Technical Field

[0001] The invention relates to the technical field of wind tunnels, and in particular to a tornado wind tunnel with an adjustable ascending channel height. Background Art

[0002] Tornadoes are violent, regional, small-scale atmospheric vortices that rotate suddenly, develop and dissipate rapidly, strike with great force, and are extremely destructive. They are often accompanied by thunderstorms, hail, and heavy rainfall, making them a particularly lethal weather disaster. Ward uses honeycomb panels to remove the vertical vorticity generated within a tornado vortex, resulting in the famous Ward-type tornado simulation system. This simulation system is divided into three parts: the convergence zone, the developing convection zone, and the accumulation zone.

[0003] Among them, Church of Purdue University and Leslie, Jischke, and Diamond of the University of Oklahoma have improved the Ward tornado simulation system through various methods and compared and analyzed data from full-scale field measurements with data from laboratory simulations. However, most existing tornado wind tunnels are static and do not account for tornado motion or changes in swirl ratio, which are the most important variables in actual tornadoes. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a tornado wind tunnel with an adjustable ascending channel height.

[0005] In order to solve the above technical problems, the present invention discloses a tornado wind tunnel with an adjustable height of an ascending channel, comprising a movable platform and a guide vane assembly, an airflow ascending section and a fan section installed on the movable platform. The rotatable and adjustable guide vanes of the guide vane assembly are arranged circumferentially along the airflow ascending section, the output port of the guide vane assembly is connected to the input port of the airflow ascending section, the input port of the fan section is connected to the output port of the airflow ascending section, and the input port or the output port of the guide vane assembly is installed with an air inlet control assembly for blocking the radial air inlet area.

[0006] Furthermore, the movable platform includes a track, a running wheel group and a support platform, the running wheel group is installed below the support column of the support platform, and the running wheel group is movably installed on the track.

[0007] Furthermore, the fan section includes a wind tube with a sealed top, and a plurality of axial flow fans are arranged circumferentially of the wind tube. The axial flow fans rotate and ascend the wind from the input port of the guide vane assembly to the output port of the air flow rising section.

[0008] Furthermore, a honeycomb device for removing vertical vorticity generated in the tornado vortex is installed between the airflow rising section and the fan section.

[0009] Furthermore, the air inlet control assembly includes at least one outer shielding tube sleeved on the outside of the guide vane assembly and a telescopic driving member for driving the outer shielding tube to move up and down relative to the guide vane assembly.

[0010] Furthermore, the air intake control assembly includes an inner shielding cylinder and an airflow rising section sleeve, the upper ends of the inner shielding cylinder and the outer shielding cylinder are sealed to form a shielding annular groove structure, the guide plate assembly is inserted into the shielding annular groove structure, the lower ends of the inner shielding cylinder and the airflow rising section sleeve are sealed to form a transition annular groove structure, and the airflow rising section sleeve and the airflow rising section are vertically sealed and slidably connected.

[0011] Furthermore, a lifting platform for placing the device to be tested is provided at the bottom of the guide plate assembly.

[0012] Furthermore, the guide vane assembly includes a guide vane mounting frame, a connecting rod mounted on the guide vane mounting frame, and a guide vane rotation drive member, wherein the guide vane rotation drive member drives the guide vane to rotate synchronously, the bottom of the connecting rod is connected to the top of the guide vane, and the bottom of the guide vane is pivotally connected to the support platform.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] The present invention simulates the horizontal motion of a tornado on the ground by mounting the deflector assembly, airflow riser, and fan section on a movable platform. By adjusting the deflector rotation angle and the radial air inlet area of ​​the deflector assembly's inlet or outlet, tornado wind fields with varying swirl ratios can be simulated. This makes tornado simulation more closely aligned with actual operating conditions, resulting in more accurate test data for the equipment under test and expanding the application scope of tornado wind tunnels. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is an axonometric diagram of a tornado wind tunnel with an adjustable ascending channel height according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic cross-sectional view of the structure of the air inlet control assembly disclosed in an embodiment of the present invention located at the lowest limit position;

[0018] Figure 3This is a schematic cross-sectional view of the structure of the air inlet control assembly disclosed in an embodiment of the present invention, located at the highest limit position.

[0019] Legend:

[0020] 1. Movable platform; 11. Track; 12. Travel wheel assembly; 13. Support platform; 14. Support column; 2. Guide vane assembly; 21. Guide vane; 22. Guide vane mounting frame; 23. Connecting rod; 3. Air flow rising section; 4. Fan section; 41. Air duct; 42. Axial flow fan; 5. Air inlet control assembly; 51. Outer shielding cylinder; 52. Inner shielding cylinder; 53. Air flow rising section sleeve; 54. Shielding annular groove structure; 55. Transition annular groove structure; 56. Telescopic drive component; 6. Lifting platform; 7. Base; 8. Honeycomb. DETAILED DESCRIPTION

[0021] To facilitate understanding of the present invention, the present invention will be described in more comprehensive and detailed form below in conjunction with the accompanying drawings and preferred embodiments. However, the protection scope of the present invention is not limited to the following specific embodiments.

[0022] like Figure 1-3 As shown, the present invention discloses a tornado wind tunnel with an adjustable ascending channel height, comprising a movable platform 1 and a deflector assembly 2, an ascending airflow section 3, and a fan section 4 mounted on the movable platform 1. The movable platform 1 is mounted on a base 7. The deflector assembly 2 has rotatably adjustable deflectors 21 arranged circumferentially along the ascending airflow section 3. The deflector directions of the multiple deflectors 21 are all offset from the center of rotation and arranged circumferentially, thereby forming the spiral base of the tornado. The output port of the deflector assembly 2 is connected to the input port of the ascending airflow section 3, and the input port of the fan section 4 is connected to the output port of the ascending airflow section 3. An air inlet control assembly 5 for blocking the radial air inlet area is installed at either the input port or the output port of the deflector assembly 2. Thus, by mounting the deflector assembly 2, the ascending airflow section 3, and the fan section 4 on a movable platform 1, the horizontal movement of a tornado on the ground can be simulated. By adjusting the rotation angle of the guide vanes 21 and the radial inlet area of ​​the inlet or outlet of the guide vane assembly 2, tornado wind fields with different swirl ratios can be simulated. This makes the tornado simulation more consistent with actual working conditions, provides more accurate test data for the equipment under test, and expands the application range of tornado wind tunnels.

[0023] In this embodiment, in order to achieve the movement of the tornado, the movable platform 1 includes a track 11, a running wheel group 12 and a support platform 13. The track 11 can adopt an I-shaped train track, and the running wheel group 12 is installed below the support column 14 of the support platform 13. The running wheel group 12 is movably installed on the track 11, and at least one running wheel group 12 is provided with a wheel-side motor with a reducer, which is directly driven to move by the wheel-side motor.

[0024] In this embodiment, to achieve the tornado's upward rotation, the fan section 4 includes a top-sealed air duct 41. Multiple axial fans 42 are evenly distributed around the circumference of the air duct 41. These fans 42 rotate and guide air upward from the inlet of the guide vane assembly 2 to the outlet of the airflow riser section 3. Furthermore, a honeycomb device 8 is installed between the airflow riser section 3 and the fan section 4 to remove vertical vorticity generated in the tornado's vortex.

[0025] In this embodiment, the air inlet control assembly 5 includes an outer shielding tube 51 that is sleeved on the outside of the guide vane assembly 2 and a telescopic drive component 56 for driving the outer shielding tube 51 to move up and down relative to the guide vane assembly 2, such as a cylinder or an electric cylinder, wherein the telescopic drive component 56 is installed on the support platform 13 and can use a telescopic cylinder or an electric push rod.

[0026] In this embodiment, the air inlet control assembly 5 also includes an inner shielding tube 52 and an airflow rising section sleeve 53. The upper ends of the inner shielding tube 52 and the outer shielding tube 51 are sealed to form a shielding annular groove structure 54. The guide vane assembly 2 is inserted into the shielding annular groove structure 54. The lower ends of the inner shielding tube 52 and the airflow rising section sleeve 53 are sealed to form a transition annular groove structure 55. The shielding annular groove structure 54 and the transition annular groove structure 55 form a bending structure with a "J" shaped cross-section. Both are frame structures with surface skins to ensure strength, thereby avoiding turbulence after wind enters from the guide vane assembly 2. At the same time, through the structure of the transition annular groove structure 55, it is possible to ensure matching with the airflow rising section 3 when expanding the bottom volume of the tornado. The airflow rising section sleeve 53 and the airflow rising section 3 are vertically sealed and slidably connected and inserted into the outside of the airflow rising section 3.

[0027] In this embodiment, a lifting platform 6 for placing the equipment to be tested is provided at the bottom of the guide vane assembly 2. When the test equipment needs to enter, the lifting platform 6 is lowered to facilitate the train set or car to enter. The lifting platform 6 is a hydraulically driven scissor lift.

[0028] In this embodiment, to enable the deflector assembly 2 to follow the movement of the movable platform 1, the deflector assembly 2 includes a deflector mounting frame 22, a connecting rod 23 mounted on the deflector mounting frame 22, and a deflector rotation driver. The deflector rotation driver drives the deflector 21 to rotate synchronously, thereby adjusting the deflection angle of the deflector 21. The bottom of the connecting rod 23 is connected to the deflector 21, and a gap is provided between the bottom of the deflector mounting frame 22 and the base 7. The shielding annular groove structure 54 can slide up and down along the connecting rod 23 in a sealed manner, thereby ensuring control of the radial air inlet area while also taking into account the installation and fixation of the deflector mounting frame 22.

[0029] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A tornado wind tunnel with an adjustable ascending channel height, characterized in that: The invention comprises a movable platform (1) and a guide vane assembly (2), an air flow rising section (3) and a fan section (4) mounted on the movable platform (1); the rotatably adjustable guide vanes (21) of the guide vane assembly (2) are arranged circumferentially along the air flow rising section (3); the output port of the guide vane assembly (2) is connected to the input port of the air flow rising section (3); the input port of the fan section (4) is connected to the output port of the air flow rising section (3); and an air inlet control assembly (5) for shielding a radial air inlet area is installed at the input port or the output port of the guide vane assembly (2); The movable platform (1) includes a track (11), a running wheel group (12) and a support platform (13), wherein the running wheel group (12) is installed below the support column (14) of the support platform (13), and the running wheel group (12) is movably installed on the track (11); the air inlet control component (5) includes an outer shielding cylinder (51) sleeved on the outside of the guide vane component (2) and a telescopic driving member (56) for driving the outer shielding cylinder (51) to move up and down relative to the guide vane component (2); the air inlet control component (5) also includes an inner shielding cylinder (52) and an airflow rising section sleeve (53), and the upper ends of the inner shielding cylinder (52) and the outer shielding cylinder (51) are sealed to form a shielding annular groove structure. The guide vane assembly (2) is inserted into the shielding annular groove structure (54), the lower ends of the inner shielding cylinder (52) and the airflow rising section sleeve (53) are sealed to form a transition annular groove structure (55), and the airflow rising section sleeve (53) and the airflow rising section (3) are vertically sealed and slidably connected; the guide vane assembly (2) includes a guide vane mounting frame (22) and a connecting rod (23) mounted on the guide vane mounting frame (22) and a guide vane rotation drive member, the guide vane rotation drive member drives the guide vane (21) to rotate, the bottom of the connecting rod (23) is connected to the top of the guide vane (21), and the bottom of the guide vane (21) is pivotally connected to the support platform (13).

2. The tornado wind tunnel with adjustable ascending channel height according to claim 1, characterized in that: The fan section (4) comprises a top-sealed air duct (41), wherein a plurality of axial flow fans (42) are arranged circumferentially around the air duct (41), and wherein the axial flow fans (42) rotate and ascend the air from the input port of the guide vane assembly (2) to the output port of the air flow ascending section (3).

3. The tornado wind tunnel with adjustable ascending channel height according to claim 1, characterized in that: A honeycomb device (8) for removing vertical vorticity generated in the tornado vortex is installed between the airflow ascending section (3) and the fan section (4).

4. The tornado wind tunnel with adjustable ascending channel height according to any one of claims 1 to 3, characterized in that: A lifting platform (6) for placing the equipment to be tested is provided at the bottom of the guide plate assembly (2).

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