Variable-section diffusion section device

Abstract

The invention provides a variable-section diffusion section device which is installed behind a wind tunnel test section and comprises a reentry section and a diffusion section. The inlet end of the reentry section is in butt joint with the outlet of the test section, the reentry section is defined by a plurality of reentry section wall plate assemblies, and the positions of the reentry section wall plate assemblies can be adjusted; the diffusion section is connected with the outlet end of the reentry section, the diffusion section is defined by a plurality of diffusion section wall plate assemblies, and the positions of the diffusion section wall plate assemblies can be adjusted; by changing the positions of the reentry section wall plate assembly and the diffusion section wall plate assembly, the change of the section size of the diffusion section device is realized. The wind tunnel construction cost is reduced, the occupied area is saved, the test efficiency is improved, and the wind tunnel test capability is expanded.

Description

Technical Field

[0001] The invention relates to the technical field of wind tunnel design, and in particular to a diffuser device with a variable cross-section. Background Art

[0002] A wind tunnel is a wind tunnel laboratory. It is a pipe-shaped experimental equipment that artificially generates and controls airflow to simulate the flow of gas around an aircraft or entity. It can also measure the effect of airflow on the entity and observe physical phenomena. It is one of the most commonly used and effective tools for conducting aerodynamic experiments.

[0003] Wind tunnel experiments are an indispensable part of aircraft development. They not only play an important role in the research and development of aviation and aerospace engineering, but also become indispensable in the fields of transportation, housing construction, wind energy utilization, etc. with the development of industrial aerodynamics. In this experimental method, the flow conditions are easy to control. During the experiment, the model or object is often fixed in the wind tunnel for repeated blowing, and the experimental data is obtained through measurement and control instruments and equipment.

[0004] The test section is the part of the wind tunnel where the model test is carried out and is the center of the entire wind tunnel. The diffuser section is the expansion pipe in the wind tunnel, which converts the kinetic energy of the airflow into pressure energy to reduce the loss of the wind tunnel.

[0005] When designing a wind tunnel, in the face of different test objects and test requirements, it is necessary to design dedicated test sections with multiple cross-sectional sizes, and in order to reduce energy loss, a diffuser section needs to be designed behind the test section. In traditional wind tunnel design, different test sections also need to have different corresponding diffusers, resulting in high wind tunnel construction costs, occupied site area, and cumbersome replacement of diffusers.

[0006] In view of this, the inventor of the present application designed a diffuser device with a variable cross-section in order to overcome the above technical problems. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the defects in the prior art that different test sections require different diffusers, resulting in high wind tunnel construction costs, occupied site area, and cumbersome replacement of diffusers, and to provide a diffuser device with a variable cross-section.

[0008] The present invention solves the above technical problems through the following technical solutions:

[0009] The present invention provides a diffuser section device with a variable cross-section, which is characterized in that the diffuser section device is installed behind a wind tunnel test section, and comprises a reentry section and a diffuser section; the inlet end of the reentry section is butted against the outlet of the test section, the reentry section is surrounded by a plurality of reentry section wall panel assemblies, and the position of the reentry section wall panel assemblies can be adjusted; the diffuser section is connected to the outlet end of the reentry section, the diffuser section is surrounded by a plurality of diffuser section wall panel assemblies, and the position of the diffuser section wall panel assemblies can be adjusted; the change of the cross-sectional size of the diffuser section device is achieved by changing the positions of the reentry section wall panel assemblies and the diffuser section wall panel assemblies.

[0010] According to one embodiment of the present invention, the reentry section wall panel assembly includes reentry section wall panels arranged up and down and reentry section side wall panels arranged on both sides, and the positions of the reentry section wall panels and the reentry section side wall panels can be adjusted; the diffusion section wall panel assembly includes diffusion section wall panels arranged up and down and diffusion section side wall panels arranged on both sides, and the positions of the diffusion section side wall panels can be adjusted; by changing the positions of the reentry section wall panels, the reentry section side wall panels and the diffusion section side wall panels, the cross-sectional dimensions of the diffusion section device can be changed.

[0011] According to one embodiment of the present invention, the reentry section wall panel includes a reentry section front wall panel, a reentry section rear wall panel and a supplementary wall panel, the reentry section front wall panel is movably connected to the reentry section rear wall panel, the reentry section front wall panel and the reentry section rear wall panel are arranged in the middle of the reentry section wall panel, and the supplementary wall panel is arranged on both sides of the reentry section wall panel for supplementing the contour after the cross-section changes; the reentry section rear wall panel is movably connected to the diffusion section wall panel.

[0012] According to one embodiment of the present invention, the re-entry section front wall panel and the re-entry section rear wall panel are connected via a first hinge seat, and the re-entry section front wall panel and the re-entry section rear wall panel can rotate relative to each other via the first hinge seat; the re-entry section rear wall panel and the diffusion section wall panel are connected via a second hinge seat, and the re-entry section rear wall panel and the diffusion section wall panel can rotate relative to each other via the second hinge seat.

[0013] According to one embodiment of the present invention, the front wall plate of the reentry section is connected to the first spiral elevator, and the first spiral elevator is connected to the first fixed support through a third hinge seat; the rear wall plate of the reentry section is connected to the second spiral elevator, and the second spiral elevator is connected to the first fixed support through a fourth hinge seat; the first spiral elevator and the second spiral elevator can drive the front wall plate of the reentry section and the rear wall plate of the reentry section to rotate, and the first spiral elevator and the second spiral elevator can rotate through the third hinge seat and the fourth hinge seat.

[0014] According to one embodiment of the present invention, the reentry section side wall panel and the diffusion section side wall panel are connected via a fifth hinged seat.

[0015] According to one embodiment of the present invention, the reentry section side wall plate is connected to a third spiral elevator, the third spiral elevator is connected to a second fixed support, and the third spiral elevator can drive the reentry section side wall plate to rotate.

[0016] According to one embodiment of the present invention, running wheels are provided below the reentry section side wall plate.

[0017] According to one embodiment of the present invention, the diffuser section wall panel is fixedly arranged, and the diffuser section side wall panel is provided with a sixth hinge seat at the outlet of the diffuser section, so that the diffuser section side wall panel can rotate around the sixth hinge seat.

[0018] According to one embodiment of the present invention, the diffuser section side wall plate is connected to a fourth spiral elevator, the fourth spiral elevator is connected to a third fixed support, and the fourth spiral elevator can drive the diffuser section side wall plate to rotate around the sixth hinged seat.

[0019] According to one embodiment of the present invention, walking wheels are provided below the side wall plate of the diffusion section.

[0020] The positive and progressive effects of the present invention are:

[0021] The variable cross-section diffuser device of the present invention has at least the following advantages:

[0022] Since the reentry section front wall plate, the reentry section rear wall plate and the reentry section side wall plate above and below the reentry section can be driven to rotate by the screw elevator, the cross-sectional size of the reentry section can be changed. At the same time, the diffuser section side wall plate can also be driven to rotate by the screw elevator, so that the diffusion angle of the entire variable cross-section diffuser device is small, ensuring that the airflow is not dispersed during the wind tunnel test. The present invention reduces the cost of wind tunnel construction, saves floor space, improves test efficiency, and expands the wind tunnel test capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the variable cross-section diffusion section device of the present invention.

[0025] Figure 2 It is a front schematic diagram of a variable cross-section diffuser device of the present invention.

[0026] Figure 3 It is a side view schematic diagram of the variable cross-section diffusion section device of the present invention.

[0027] Figure 4 It is a top view schematic diagram of a variable cross-section diffusion section device of the present invention.

[0028] [Reference Signs]

[0029] Reentry Segment 11

[0030] Reentry wall assembly 100

[0031] Reentry wall 110

[0032] Reentry front wall panel 111

[0033] Reentry rear wall 112

[0034] Supplementary wall panels 113

[0035] The first hinge seat 114

[0036] The second hinge seat 115

[0037] First screw elevator 116a

[0038] The first fixed support 117

[0039] The third hinge seat 118

[0040] Second spiral elevator 116b

[0041] Fourth articulated seat 119

[0042] Reentry side wall panel 120

[0043] Fifth articulated seat 121

[0044] The third screw elevator 122

[0045] The second fixed support 123

[0046] Travel wheel 124

[0047] Diffuser 21

[0048] Diffuser wall assembly 200

[0049] Diffuser wall panel 210

[0050] Sixth hinge seat 211

[0051] Diffusion section side wall plate 220

[0052] Fourth spiral elevator 221

[0053] The third fixed support 222 DETAILED DESCRIPTION

[0054] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0055] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the present invention, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used in all drawings to represent the same or similar parts. In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present invention may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description herein. In addition, it is required to understand the present invention not only by the actual terms used, but also by the meaning implied by each term.

[0056] like Figure 1 As shown, the present invention provides a diffuser section device with a variable cross-section, which is installed behind a wind tunnel test section and includes a reentry section 11 and a diffuser section 21.

[0057] The inlet end of the reentry section 11 is butted against the outlet of the test section. The reentry section 11 is surrounded by a plurality of reentry section wall panel assemblies 100 , and the position of the reentry section wall panel assemblies 100 can be adjusted.

[0058] The diffuser section 21 is connected to the exit end of the reentry section 11 . The diffuser section 21 is surrounded by a plurality of diffuser section wall panel assemblies 200 . The positions of the diffuser section wall panel assemblies 200 can be adjusted.

[0059] By changing the positions of the reentry section wall panel assembly 100 and the diffusion section wall panel assembly 200, the cross-sectional dimensions of the diffusion section device can be changed.

[0060] By changing the positions of the reentry section wall panel assembly 100 and the diffusion section wall panel assembly 200, the cross-sectional dimensions of the diffusion section device can be changed to adapt to docking test sections with different cross-sectional dimensions.

[0061] like Figure 2 to Figure 4 As shown, as a preferred embodiment of the variable-cross-section diffusion section device of the present invention, the reentry section wall panel assembly 100 includes reentry section wall panels 110 arranged up and down and reentry section side wall panels 120 arranged on both sides, and the positions of the reentry section wall panels 110 and the reentry section side wall panels 120 can be adjusted.

[0062] The diffuser section wall panel assembly 200 includes diffuser section wall panels 210 arranged up and down and diffuser section side wall panels 220 arranged on both sides. The positions of the diffuser section side wall panels 220 can be adjusted.

[0063] By changing the positions of the reentry section wall plate 110, the reentry section side wall plate 120 and the diffusion section side wall plate 220, the cross-sectional dimensions of the diffusion section device can be changed.

[0064] The reentry section 11 is composed of reentry section side wall panels 120 on the left and right sides and upper and lower reentry section wall panels 110 to form the outline of the reentry section 11.

[0065] The diffuser section 21 is mainly composed of two upper and lower diffuser section wall panels 210 and two left and right diffuser section side wall panels 220 .

[0066] By changing the positions of the reentry section wall panel 110, the reentry section side wall panel 120 and the diffusion section side wall panel 220, the cross-sectional dimensions of the diffusion section device can be changed to adapt to docking test sections with different cross-sectional dimensions.

[0067] like Figure 2 to Figure 4 As shown, as a preferred embodiment of the variable cross-section diffusion section device of the present invention, the reentry section wall panel 110 includes a reentry section front wall panel 111, a reentry section rear wall panel 112 and a supplementary wall panel 113.

[0068] The re-entry section front wall panel 111 is movably connected to the re-entry section rear wall panel 112. The re-entry section front wall panel 111 and the re-entry section rear wall panel 112 are arranged in the middle of the re-entry section wall panel 110. The supplementary wall panels 113 are arranged on both sides of the re-entry section wall panel 110 for supplementing the contour after the cross-section is changed.

[0069] The reentry section rear wall panel 112 is movably connected to the diffusion section wall panel 210 .

[0070] The reentry section 11 is composed of the reentry section side wall panels 120 on the left and right sides, the upper and lower reentry section front wall panels 111, the reentry section rear wall panels 112 and the supplementary wall panels 113. The supplementary wall panels 113 are used to supplement the profile after changing the cross section to ensure that the airflow does not flow out during the test.

[0071] The movable connection between the reentry section front wall panel 111 and the reentry section rear wall panel 112 is preferably connected through a hinge seat.

[0072] The reentry section rear wall panel 112 and the diffusion section wall panel 210 are preferably connected by a hinge seat.

[0073] like Figure 2 to Figure 4 As shown, as a preferred embodiment of the variable-cross-section diffusion section device of the present invention, the re-entry section front wall plate 111 and the re-entry section rear wall plate 112 are connected by a first hinge seat 114, and the re-entry section front wall plate 111 and the re-entry section rear wall plate 112 can rotate relative to each other through the first hinge seat 114.

[0074] The reentry section rear wall panel 112 and the diffusion section wall panel 210 are connected via a second hinge seat 115 , and the reentry section rear wall panel 112 and the diffusion section wall panel 210 can rotate relative to each other via the second hinge seat 115 .

[0075] like Figure 2 to Figure 4 As shown, as a preferred embodiment of the variable cross-section diffuser device of the present invention, the reentry section front wall plate 111 is connected to the first spiral elevator 116a, and the first spiral elevator 116a is connected to the first fixed support 117 through the third hinge seat 118.

[0076] The reentry section rear wall plate 112 is connected to the second spiral elevator 116 b , and the second spiral elevator 116 b is connected to the first fixed support 117 via a fourth hinged seat 119 .

[0077] The first spiral elevator 116a and the second spiral elevator 116b can drive the reentry section front wall plate 111 and the reentry section rear wall plate 112 to rotate. The first spiral elevator 116a and the second spiral elevator 116b can rotate through the third hinge seat 118 and the fourth hinge seat 119.

[0078] like Figure 2 to Figure 4 As shown, as a preferred embodiment of the variable cross-section diffuser device of the present invention, the reentry section side wall panel 120 and the diffuser section side wall panel 220 are connected via a fifth hinge seat 121 .

[0079] like Figure 2 to Figure 4 As shown, as a preferred embodiment of the variable cross-section diffusion section device of the present invention, the reentry section side wall plate 120 is connected to the third spiral elevator 122, the third spiral elevator 122 is connected to the second fixed support 123, and the third spiral elevator 122 can drive the reentry section side wall plate 120 to rotate.

[0080] like Figure 2 to Figure 4 As shown, as a preferred embodiment of the variable cross-section diffuser device of the present invention, a travel wheel 124 is provided below the reentry section side wall plate 120 .

[0081] The reentry section side wall plate 120 is connected to four third spiral elevators 122. The third spiral elevators 122 are connected to the second fixed support 123. At the same time, two running wheels 124 are installed below the reentry section side wall plate 120. The reentry section side wall plate 120 is driven to rotate by the third spiral elevators 122, and the running wheels 124 can reduce the resistance of the reentry section side wall plate 120 when rotating.

[0082] like Figure 2 to Figure 4As shown, as a preferred embodiment of the variable-section diffusion section device of the present invention, the diffusion section wall panel 210 is fixedly arranged, and the diffusion section side wall panel 220 is provided with a sixth hinge seat 211 at the outlet of the diffusion section 21, so that the diffusion section side wall panel 220 can rotate around the sixth hinge seat 211.

[0083] The diffuser section wall plate 210 is fixed, and the diffuser section side wall plate 220 is provided with two sixth hinge seats 211 for rotation.

[0084] like Figure 2 to Figure 4 As shown, as a preferred embodiment of the variable-section diffuser device of the present invention, the diffuser side wall plate 220 is connected to the fourth spiral elevator 221, the fourth spiral elevator 221 is connected to the third fixed support 222, and the fourth spiral elevator 221 can drive the diffuser side wall plate 220 to rotate around the sixth hinge seat 211.

[0085] like Figure 2 to Figure 4 As shown, as a preferred embodiment of the variable cross-section diffuser device of the present invention, a travel wheel 124 is provided below the diffuser side wall plate 220 .

[0086] The diffuser side wall plate 220 is connected to two fourth spiral elevators 221, and the fourth spiral elevator 221 is connected to the third fixed support 222. A running wheel 124 is installed below the diffuser side wall plate 220. The diffuser side wall plate 220 is driven by the fourth spiral elevator 221 to rotate around the sixth hinge seat 211, and the running wheel 124 can reduce the resistance during rotation.

[0087] In summary, the variable cross-section diffusion section device of the present invention is mainly composed of a reentry section 11 and a diffusion section 21. The reentry section 11 includes a reentry section front wall panel 111, a reentry section rear wall panel 112, a supplementary wall panel 113, a reentry section side wall panel 120, a spiral elevator for adjusting each wall panel, and a fixed support; the diffusion section 21 is composed of a diffusion section wall panel 210, a diffusion section side wall panel 220, a spiral elevator for adjusting the wall panel, and a fixed support. The front end of the reentry section 11 is docked with the test section outlet, the rear end of the reentry section wall panel 110 is hingedly connected to the diffusion section wall panel 210, and the rear end of the diffusion section 21 is installed on a rotating hinge seat. The wall panel is driven by the spiral elevator, and the wall panel rotates around the hinge seat, thereby realizing the variable cross-section of the diffusion section device.

[0088] The present invention drives the wall plate of the diffusion section device through a spiral elevator to achieve the change of the cross-sectional size of the diffusion section device.

[0089] The present invention specifically uses multiple first spiral elevators 116a, second spiral elevators 116b, third spiral elevators 122 and fourth spiral elevators 221 to rotate the reentry section front wall plate 111, the reentry section rear wall plate 112, the reentry section side wall plate 120 and the diffusion section side wall plate 220, thereby changing the cross-sectional size of the diffusion section device for docking test sections with different cross-sectional sizes.

[0090] The present invention drives the wall plate of the diffusion section device through a spiral elevator to achieve the change of the cross-sectional size of the diffusion section device.

[0091] The variable cross-section diffuser device of the present invention has the following advantages: the reentry section front wall plate 111, the reentry section rear wall plate 112 and the reentry section side wall plate 120 above and below the reentry section 11 can be driven to rotate by a screw elevator, thereby changing the cross-sectional size of the reentry section 11. At the same time, the diffuser section side wall plate 220 can also be driven to rotate by a screw elevator, so that the diffusion angle of the entire variable cross-section diffuser device is small, ensuring that the airflow is not dispersed during the wind tunnel test. The present invention reduces the cost of wind tunnel construction, saves floor space, improves test efficiency, and expands the wind tunnel test capability.

[0092] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A diffuser device with a variable cross-section, characterized in that: The diffuser section device is installed behind the wind tunnel test section and includes a reentry section and a diffuser section; The inlet end of the reentry section is butted against the outlet of the test section, and the reentry section is surrounded by a plurality of reentry section wall panel assemblies, and the positions of the reentry section wall panel assemblies can be adjusted; The diffuser section is connected to the outlet end of the reentry section, and the diffuser section is surrounded by a plurality of diffuser section wall panel assemblies, and the position of the diffuser section wall panel assemblies can be adjusted; The cross-sectional dimensions of the diffuser device are changed by changing the positions of the reentry section wall panel assembly and the diffuser section wall panel assembly.

2. The variable cross-section diffuser device according to claim 1, characterized in that: The reentry section wall panel assembly includes reentry section wall panels arranged up and down and reentry section side wall panels arranged on both sides, and the positions of the reentry section wall panels and the reentry section side wall panels can be adjusted; The diffuser section wall panel assembly includes diffuser section wall panels arranged up and down and diffuser section side wall panels arranged on both sides, and the positions of the diffuser section side wall panels can be adjusted; The cross-sectional dimensions of the diffuser device are changed by changing the positions of the reentry section wall plate, the reentry section side wall plate and the diffuser section side wall plate.

3. The variable cross-section diffuser device according to claim 2, characterized in that: The reentry section wall panels include a reentry section front wall panel, a reentry section rear wall panel and a supplementary wall panel. The reentry section front wall plate is movably connected to the reentry section rear wall plate, the reentry section front wall plate and the reentry section rear wall plate are arranged in the middle of the reentry section wall plate, and the supplementary wall plates are arranged on both sides of the reentry section wall plate, for supplementing the profile after the cross section is changed; The reentry section rear wall panel is movably connected to the diffusion section wall panel.

4. The variable cross-section diffuser device according to claim 3, characterized in that: The reentry section front wall plate and the reentry section rear wall plate are connected via a first hinge seat, and the reentry section front wall plate and the reentry section rear wall plate can rotate relative to each other via the first hinge seat; The reentry section rear wall panel and the diffusion section wall panel are connected via a second hinge seat, and the reentry section rear wall panel and the diffusion section wall panel can rotate relative to each other via the second hinge seat.

5. The variable cross-section diffuser device according to claim 4, characterized in that: The reentry section front wall plate is connected to the first spiral elevator, and the first spiral elevator is connected to the first fixed support via a third hinged seat; The reentry section rear wall plate is connected to the second spiral elevator, and the second spiral elevator is connected to the first fixed support via a fourth hinged seat; The first spiral elevator and the second spiral elevator can drive the reentry section front wall plate and the reentry section rear wall plate to rotate, and the first spiral elevator and the second spiral elevator can rotate through the third hinge seat and the fourth hinge seat.

6. The variable cross-section diffuser device according to claim 2, characterized in that: The reentry section side wall plate is connected to the diffusion section side wall plate via a fifth hinge seat.

7. The variable cross-section diffuser device according to claim 6, characterized in that: The reentry section side wall plate is connected to a third spiral elevator, the third spiral elevator is connected to a second fixed support, and the third spiral elevator can drive the reentry section side wall plate to rotate.

8. The variable cross-section diffuser device according to claim 7, characterized in that: Travel wheels are arranged below the reentry section side wall plate.

9. The variable cross-section diffuser device according to claim 2, characterized in that: The diffuser section wall plate is fixedly arranged, and the diffuser section side wall plate is provided with a sixth hinge seat at the outlet of the diffuser section, so that the diffuser section side wall plate can rotate around the sixth hinge seat.

10. The variable cross-section diffuser device according to claim 9, characterized in that: The diffuser section side wall plate is connected to a fourth spiral elevator, the fourth spiral elevator is connected to a third fixed support, and the fourth spiral elevator can drive the diffuser section side wall plate to rotate around the sixth hinged seat.

11. The variable cross-section diffuser device according to claim 10, characterized in that: Traveling wheels are arranged below the side wall plate of the diffusion section.

Images