A wind tunnel laboratory circulating wind direction changing device

Abstract

This invention relates to the field of wind tunnel laboratory technology and discloses a circulating wind direction-changing device for a wind tunnel laboratory, comprising an air inlet pressurization section and a wind direction adjustment section. The air inlet pressurization section further includes: an air inlet duct, a pressurization pipe, a fixed frame, an impeller, and a support frame; the wind direction adjustment section further includes: a direction-changing shell, a stabilizing plate, a limiting plate, a direction-changing plate, a baffle, a guide component, a fixed block, a guide rod, a gear, a fixed shell, a straight plate, a mesh frame, and a geared motor. The air inlet pressurization section pressurizes the circulating air through the pressurization pipe, and the wind force can be increased or decreased by adjusting the impeller; the wind direction adjustment section uses a geared motor to drive the movement of other components, thereby changing the wind direction. This circulating wind direction-changing device for a wind tunnel laboratory combines natural wind with the airflow generated by physical movement in experiments, effectively avoiding the uniformity of experimental results and making the experimental data more accurate and effective.

Description

Technical Field

[0001] This invention relates to the field of wind tunnel laboratory technology, specifically a circulating wind reversal device for a wind tunnel laboratory. Background Technology

[0002] A wind tunnel, or wind tunnel laboratory, is a tubular experimental device that artificially generates and controls airflow to simulate the flow of gas around an aircraft or physical object. It measures the effects of airflow on the object and observes physical phenomena. It is one of the most commonly used and effective tools for conducting aerodynamic experiments. Wind tunnel experiments are an indispensable part of aircraft development. It plays an important role not only in the research and development of aviation and aerospace engineering, but also, with the development of industrial aerodynamics, in fields such as transportation, building construction, and wind energy utilization. This experimental method allows for easy control of flow conditions. During the experiment, models or physical objects are often fixed in the wind tunnel and repeatedly exposed to airflow. Experimental data is obtained through measuring and control instruments and equipment.

[0003] Wind tunnel laboratories can only propel air in one direction during experiments, making it impossible to change the wind direction and simulate natural wind. This results in limited and predictable test results for parameters such as wind resistance. Therefore, Chinese utility model patent CN215910089U proposes a wind tunnel testing auxiliary device with height adjustment to address these issues. The technical solution is as follows: This utility model discloses a wind tunnel testing auxiliary device with height adjustment, comprising a chassis and a detection component. The chassis is positioned above... An air outlet assembly for blowing air is provided, and a testing component for conducting tests is located to the right of the air outlet assembly. The testing component includes a lifting rod, a lifting column, a slider, a protective cover, a groove, a base frame, an air inlet, a filter, an integrated plate, an anemometer, a thermometer, a hygrometer, a mounting bracket, and an air outlet. A lifting column is fixedly connected to the top of the lifting rod, and a slider is fixedly connected to the outside of the lifting column. A protective cover is provided outside the slider, and a groove is formed on the inner wall of the protective cover. The base frame is rotatably connected to the top of the lifting column, and an air inlet is located at the left end of the base frame. A filter is located to the right of the air inlet. This invention, through the setting of the lifting rod, allows the lifting rod to drive the base frame to rise and fall, enabling the model inside the base frame to undergo airflow testing in different areas. Simultaneously, the four lifting rods can be raised and lowered to different heights, thereby changing the inclination between the base frame and the base plate, and thus changing the wind angle of the model inside the base frame, making the wind tunnel testing of the model more comprehensive.

[0004] However, changing the position and angle of the bottom frame to alter the wind angle of the model inside the frame may change the relative position of the air inlet to the original wind direction, creating new variables and resulting in inaccurate wind tunnel test data. Summary of the Invention

[0005] The purpose of this invention is to provide a circulating wind reversal device for a wind tunnel laboratory, which simulates natural wind by changing the angle of the air outlet. At the same time, changing only the angle of the air outlet produces relatively simple variables compared to the original state, which can ensure more accurate and effective experimental data.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A circulating air reversing device for a wind tunnel laboratory includes an air inlet pressurization section and an air direction adjustment section. The air inlet pressurization section further includes: an air inlet duct, a pressurization pipe, a fixed frame, an impeller, and a support frame. The air direction adjustment section further includes: a reversing shell, a stabilizing plate, a limiting plate, a reversing plate, a baffle, a guide component, a fixing block, a guide rod, a gear, a fixed shell, a straight plate, a mesh frame, and a geared motor. The reversing shell contains several stabilizing plates, and a limiting plate that cooperates with the stabilizing plates is also located inside the reversing shell. One end of the limiting plate is connected to the reversing plate. A curved baffle is located on the right side of the reversing shell, and the baffle has a guide component extending to the outside of the reversing shell. One end of the guide rod is connected to a fixing block for limiting the direction. The fixed shell has a gear that contacts one side of the baffle. The contact portion between the baffle and the gear has corresponding mating teeth. The gear meshes with the geared motor. The geared motor is located above the fixed shell. The baffle and the reversing plate are connected by a straight plate and a mesh frame at the bottom of the straight plate.

[0008] As a further embodiment of the present invention: the stabilizing plate further includes: a frame plate, a drag-reducing plate, a fixing plate, a noise-reducing plate, and a wire mesh. The drag-reducing plate is fixedly installed on the left side of the frame plate, the fixing plate is fixedly installed inside the frame plate, two noise-reducing plates are fixedly installed inside the frame plate and located on the upper and lower sides of the fixing plate, respectively, and two wire meshes are fixedly installed inside the frame plate and located on opposite sides of the two noise-reducing plates. The drag-reducing plate is triangular in shape.

[0009] As a further embodiment of the present invention: the stabilizing plates are vertically distributed, the deflecting plates cooperate with the limiting plates, the limiting plates are arc-shaped, the curvature of the deflecting plates and the limiting plates are matched, and the centers of all the limiting plates coincide.

[0010] As a further embodiment of the present invention, the guide member and the guide rod are slidably connected.

[0011] As a further embodiment of the present invention: the deflector shell is arc-shaped, and both the guide rod and the baffle are arc-shaped.

[0012] As a further embodiment of the present invention: the right side and bottom of the deflector housing are both open, and a fixing housing is fixedly installed on the right side of the deflector housing.

[0013] As a further embodiment of the present invention: a reduction motor that cooperates with the gear is fixedly installed on the back of the fixed shell, and a support frame is fixedly installed on the back of the air inlet and the reversing shell.

[0014] As a further embodiment of the present invention: the booster pipe is arranged in the shape of a quadrangular frustum, and the width of the air inlet of the booster pipe is greater than that of the air outlet.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The present invention provides a circulating air reversing device for a wind tunnel laboratory, which is installed inside the wind tunnel test section and the test object is located on the side of the device. In use, the circulating air enters the interior of the air inlet duct, is compressed and pressurized through the pressurization pipe, and then enters the reversing shell. The drag-reducing plate on the stabilizing plate splits the air, causing it to flow to the outside of the wire mesh on both sides. The noise reduction plate absorbs the noise energy carried in the air, making it flow smoothly and reducing experimental interference.

[0017] 2. The circulating wind reversal device provided by this invention, when it is necessary to change the lateral wind angle, the rotation of the electric gear of the reduction motor drives the baffle to slide into the reversal shell under the cooperation of the guide rod and guide component, and drives the mesh frame, straight plate and reversal plate to move, so that the reversal plate moves into the interior of the limiting plate, thereby changing the reversal angle of the airflow. The device has a stable and reasonable structure, and can reverse the circulating wind in the wind tunnel test section to simulate natural wind, so as to combine the natural wind with the airflow generated by the movement of the object in the experiment, effectively avoiding the uniformity of the experimental results. At the same time, only the wind direction is changed without changing other experimental parameters, making the experimental data more accurate and effective.

[0018] 3. The wind tunnel laboratory circulating wind direction changing device provided by the present invention can drive the impeller to rotate by the drive motor when it is necessary to increase or decrease the lateral wind force, thereby increasing the air flow resistance or increasing the air flow speed to obtain the required different wind speeds, making the data of the entire wind tunnel experiment more comprehensive. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a circulating wind reversal device for a wind tunnel laboratory.

[0020] Figure 2 This is an enlarged schematic diagram of the structure at point A in a circulating wind reversal device for a wind tunnel laboratory;

[0021] Figure 3 This is a schematic diagram of the stabilizing plate in a circulating wind reversal device for a wind tunnel laboratory.

[0022] Figure 4This is a bottom view of a circulating wind reversal device in a wind tunnel laboratory.

[0023] In the diagram: 1. Air inlet duct; 2. Pressure booster pipe; 3. Directional deflector shell; 4. Fixing frame; 5. Impeller; 6. Drive motor; 7. Stabilizing plate; 701. Frame plate; 702. Drag reduction plate; 703. Fixing plate; 704. Noise reduction plate; 705. Wire mesh; 8. Limiting plate; 9. Directional deflector plate; 10. Baffle; 11. Guide component; 12. Fixing block; 13. Guide rod; 14. Gear; 15. Fixing shell; 16. Straight plate; 17. Frame; 18. Gear motor; 19. Support frame. Detailed Implementation

[0024] Please see Figures 1-4In this embodiment of the invention, a circulating air reversing device for a wind tunnel laboratory includes an air inlet duct 1. A booster pipe 2, communicating with the air inlet duct 1, is fixedly installed on the right side of the air inlet duct 1. The booster pipe 2 is arranged in a frustum shape, with the width on the left side of the booster pipe 2 being greater than the width on the right side. A reversing shell 3, communicating with the booster pipe 2, is fixedly installed on the right side of the booster pipe 2. A fixing frame 4 is fixedly installed inside the air inlet duct 1. An impeller 5 is movably installed on the left side of the fixing frame 4. A drive motor 6, whose output end is connected to the impeller 5, is fixedly installed on the right side of the fixing frame 4. Four stabilizing plates 7 are fixedly installed inside the reversing shell 3. Four limiting plates 8, each fixedly connected to the right side of one of the four stabilizing plates 7, are fixedly installed inside the reversing shell 3. Each of the four limiting plates 8 has a [missing information - likely a device or component] inserted into its right side. The deflector plate 9 and the limiting plate 8 are arranged in an arc shape, with the deflector plate 9 and the limiting plate 8 having the same curvature. Four stabilizing plates 7 are vertically and equally spaced. The interiors of the deflector plate 9 and the limiting plate 8 are adapted to each other. A baffle 10 located to the right of the right deflector plate 9 is movably installed inside the deflector housing 3. Two guide members 11 extending to the outside of the deflector housing 3 are fixedly installed on the right side of the baffle 10. A fixed housing 15 is fixedly installed on the right side of the deflector housing 3. Two fixing blocks 12 are fixedly installed on the right side of the deflector housing 3. Guide rods 13, each penetrating the two guide members 11, are fixedly installed on the right side of each of the two fixing blocks 12. The guide members 11 and guide rods 13 are slidably connected. The centers of the four limiting plates 8 are located at the same position. A device movably installed inside the fixed housing 15 is connected to the baffle 10. The gear 14 is in contact with the right side. The right side and bottom of the deflector housing 3 are both open. The right side of the baffle 10 has meshing teeth that mesh with the gear 14. Straight plates 16 are fixedly installed on the bottom of the baffle 10 and the four deflector plates 9. A mesh frame 17 located inside the deflector housing 3 is fixedly installed on the bottom of the five straight plates 16. The five straight plates 16 are all vertically arranged and welded to the mesh frame 17. The exterior of the deflector housing 3 is arc-shaped. The guide rod 13 and the baffle 10 are both arc-shaped. A geared motor 18 that is connected to the gear 14 is fixedly installed on the back of the fixed housing 15. A support frame 19 is fixedly installed on the back of the air inlet duct 1 and the deflector housing 3. The stabilizing plate 7 includes a frame plate 701, a drag-reducing plate 702, a fixing plate 703, a noise-reducing plate 704, and steel wire. A drag-reducing plate 702 is fixedly installed on the left side of the frame plate 701. A fixing plate 703 is fixedly installed inside the frame plate 701. Two noise-reducing plates 704 are fixedly installed inside the frame plate 701, located on the upper and lower sides of the fixing plate 703 respectively. Two wire meshes 705 are fixedly installed inside the frame plate 701, located on opposite sides of the two noise-reducing plates 704 respectively. The drag-reducing plate 702 is arranged in a triangle. Guide columns are fixedly installed on the front and back of the five straight plates 16. They are installed inside the wind tunnel test section, with the test object located on the side of the device. In use, the circulating air enters the air inlet duct 1, is compressed and pressurized through the pressurization pipe 2, and then enters the deflector shell 3. The drag-reducing plate 702 on the stabilizing plate 7 splits the airflow.The airflow is directed to the outside of the wire mesh 705 on both sides, where it absorbs noise energy carried in the air through the noise reduction plate 704. Simultaneously, it is stabilized and directed to the right, then redirected by the limiting plate 8 and the deflector plate 9. The straight plate 16 stabilizes the airflow direction after the redirection. When it is necessary to increase or decrease the lateral wind force, the drive motor 6 rotates the impeller 5 to increase airflow resistance or increase airflow velocity. When it is necessary to change the lateral wind angle, the reduction motor 18 rotates the electric gear 14, which drives the baffle 10 to slide into the deflector shell 3 under the cooperation of the guide rod 13 and the guide member 11. This, in turn, moves the mesh frame 17, the straight plate 16, and the deflector plate 9, causing the deflector plate 9 to move into the limiting plate 8, thereby changing the deflection angle of the airflow. This device has a stable and reasonable structure, allowing for the redirection of circulating air in the wind tunnel experimental section, simulating natural wind. It combines natural wind with the airflow generated during physical movement, effectively avoiding the uniformity of experimental results and making the experimental data more accurate and effective.

[0025] The working principle of this invention is as follows: Installed inside the wind tunnel test section, with the test object positioned to the side of the device, during use, circulating air enters the air inlet duct 1 and is compressed and pressurized through the booster pipe 2 before entering the deflector housing 3. The drag-reducing plate 702 on the stabilizing plate 7 diverts the airflow to the outside of the wire mesh 705 on both sides. The noise-reducing plate 704 absorbs the noise energy carried in the air and stabilizes its flow to the right. The airflow is then redirected by the limiting plate 8 and the deflector plate 9. The straight plate 16 stabilizes the airflow direction after the redirection. When it is necessary to increase or decrease the lateral wind force, the drive motor 6 can rotate the impeller 5. By increasing airflow resistance or raising airflow velocity, when it is necessary to change the lateral wind angle, the geared motor 18 rotates the electric gear 14, which drives the baffle 10 to slide into the direction-changing shell 3 under the cooperation of the guide rod 13 and the guide member 11. This causes the mesh frame 17, the straight plate 16 and the direction-changing plate 9 to move, so that the direction-changing plate 9 moves into the limiting plate 8, thereby changing the direction of airflow. This device has a stable and reasonable structure and can change the direction of circulating wind in the wind tunnel test section to simulate natural wind. It combines natural wind with the airflow generated by the movement of the object to conduct experiments, effectively avoiding the singleness of experimental results and making the experimental data more accurate and effective.

[0026] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A circulating air reversing device for a wind tunnel laboratory, comprising an air inlet pressurization section and an air direction adjustment section, characterized in that, The air intake pressurization section further includes: an air intake duct (1), a pressurization pipe (2), a fixed frame (4), an impeller (5), and a support frame (19); the air direction adjustment section further includes: a deflector housing (3), a stabilizing plate (7), a limiting plate (8), a deflector plate (9), a baffle (10), a guide (11), a fixing block (12), a guide rod (13), a gear (14), a fixed housing (15), a straight plate (16), a mesh frame (17), and a geared motor (18); the deflector housing (3) is provided with several stabilizing plates (7) inside, and the deflector housing (3) is provided with a limiting plate (8) that works with the stabilizing plates (7) inside, and one end of the limiting plate (8) is connected to a deflector. The deflector plate (9) has a curved baffle (10) on the right side of the deflector housing (3). The baffle (10) has a guide (11) extending to the outside of the deflector housing (3). One end of the guide rod (13) is connected to a fixing block (12) for limiting the position. The fixing housing (15) has a gear (14) that contacts one side of the baffle (10). The baffle (10) and the gear (14) have corresponding meshing teeth. The gear (14) meshes with the gear reduction motor (18). The gear reduction motor (18) is located above the fixing housing (15). The baffle (10) and the deflector plate (9) are connected by a straight plate (16) and a mesh frame (17) at the bottom of the straight plate (16). The stabilizing plate (7) further includes: a frame plate (701), a drag-reducing plate (702), a fixing plate (703), a noise-reducing plate (704), and a wire mesh (705). The drag-reducing plate (702) is provided on the left side of the frame plate (701). The fixing plate (703) is provided inside the frame plate (701). The noise-reducing plates (704) located on the upper and lower sides of the fixing plate (703) are provided inside the frame plate (701). The wire mesh (705) located on the opposite side of the two noise-reducing plates (704) is provided inside the frame plate (701). The drag-reducing plate (702) is triangular. The stabilizing plate (7) is vertically distributed, the deflecting plate (9) cooperates with the limiting plate (8), the limiting plate (8) is arc-shaped, the curvature of the deflecting plate (9) matches that of the limiting plate (8), and the centers of all the limiting plates (8) coincide.

2. The circulating wind reversal device for a wind tunnel laboratory according to claim 1, characterized in that, The guide member (11) and the guide rod (13) are slidably connected.

3. The circulating wind reversal device for a wind tunnel laboratory according to claim 1, characterized in that, The deflector shell (3) is arc-shaped, and both the guide rod (13) and the baffle (10) are arc-shaped.

4. The circulating wind reversal device for a wind tunnel laboratory according to claim 1, characterized in that, The right side and bottom of the deflector housing (3) are both open, and a fixed housing (15) is fixedly installed on the right side of the deflector housing (3).

5. The circulating wind reversal device for a wind tunnel laboratory according to claim 1, characterized in that, The back of the air inlet duct (1) and the reversing shell (3) are provided with a support frame (19).

6. The circulating wind reversal device for a wind tunnel laboratory according to claim 1, characterized in that, The booster pipe (2) is arranged in the shape of a quadrangular frustum, and the width of the air inlet of the booster pipe (2) is greater than that of the air outlet.

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