Combined noise reduction structure for stormy wave combined laboratory

Abstract

The invention discloses a combined noise reduction structure for a wind wave combined laboratory, and relates to the technical field of wind tunnel noise reduction. Comprising a wind tunnel wall and a wind tunnel body. A wind tunnel main body is defined by the wind tunnel wall body, the wind tunnel main body is located on the steel truss and comprises a contraction section, a power section and a diffusion section which are connected in sequence, and the power section is provided with a fan; a plurality of first wall face silencing plates are installed on the annular wall faces of the contraction section and the diffusion section, a second wall face silencing plate is arranged at the bottom, third wall face silencing plates are arranged on the two sides of the inner surface of the wind tunnel wall, and the first wall face silencing plates, the second wall face silencing plates and the third wall face silencing plates are the same in structure. The wall surface micropore plate and the flow channel outer wall surface are arranged in parallel, and a plurality of wall surface partition plate ribs are arranged between the wall surface micropore plate and the flow channel outer wall surface. The combined noise reduction mode that resistive noise elimination and capacitive noise elimination are combined is adopted in the wall faces and the flow channels, the space layout of the noise elimination plates is optimized, noise is effectively restrained, and the noise reduction cost is remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wind tunnel noise reduction, and in particular to a combined noise reduction structure for a wind-wave combined laboratory. Background Art

[0002] As core testing equipment for studying physical phenomena such as aerodynamics and aeroacoustics, wind tunnels play a vital role in aerospace engineering, architectural wind engineering, and reliability verification of marine structures. With the deepening development of marine resources, wind tunnel testing has become widely used to test the wind resistance of large structures such as offshore platforms. However, during wind tunnel operation, acoustic interference issues such as self-generated noise from the borehole wall, turbulent boundary layer noise, and fan noise are becoming increasingly prominent. This not only reduces the accuracy of test data but also causes noise pollution to experimenters and the surrounding environment.

[0003] Currently, conventional wind tunnel laboratories primarily reduce noise impact by selecting locations away from residential areas, resulting in relatively low sound insulation requirements. Small wind tunnels, however, face relatively manageable noise reduction challenges due to their limited structural dimensions and smaller number of wind turbines. However, large wind and wave joint laboratories (e.g., those located in teaching and research areas and equipped with multiple flow channels or large test sections) face the following technical challenges in noise reduction:

[0004] 1. The sound sources are complex and high in intensity: During the operation of large wind tunnels, the airflow noise, mechanical vibration noise, and structural resonance noise are coupled with each other, forming a broadband noise that is difficult to fully cover with traditional sound absorption and insulation measures;

[0005] 2. Strict space constraints: Laboratories in teaching areas or urban environments need to balance compact layout and efficient noise reduction. Existing passive noise reduction structures (such as anechoic chambers or soundproof enclosures) often take up too much space and are less economical. Summary of the Invention

[0006] The purpose of the present invention is to provide a combined noise reduction structure for a wind-wave joint laboratory, which adopts a combined noise reduction method combining resistive noise reduction and capacitive noise reduction in the wall and flow channel, and optimizes the spatial layout of the noise reduction panels, thereby effectively suppressing noise and significantly reducing the noise reduction cost.

[0007] To achieve the above-mentioned purpose, the technical solution of the present application is: a joint noise reduction structure for a wind and wave joint laboratory, comprising a wind tunnel wall and a wind tunnel body; the wind tunnel wall encloses a wind tunnel body, which is located on a steel truss and comprises a contraction section, a power section and a diffusion section connected in sequence, and the power section is provided with a fan; a plurality of first wall silencers are installed on the circumferential wall of the contraction section and the diffusion section, a second wall silencer is provided at the bottom position, and a third wall silencer is provided on both sides of the inner surface of the wind tunnel wall, the first wall silencer, the second wall silencer and the third wall silencer have the same structure, and all include parallel wall microporous plates and the outer wall of the flow channel, with a plurality of wall partition ribs provided between the two.

[0008] As a preferred solution of the present invention, the two ends of the first wall silencer are fixedly connected to the wall guide plates, and a flow channel silencer is provided between adjacent first wall silencers, which includes a first flow channel microporous plate and a second flow channel microporous plate arranged in parallel, and a number of flow channel partition ribs are provided between the two.

[0009] As a preferred solution of the present invention, both ends of the flow channel silencer plate are fixedly connected with flow channel guide plates.

[0010] As a preferred solution of the present invention, support legs are connected to the bottom of the fan, and the support legs are fixed on the support leg support plates of the steel truss.

[0011] As a preferred solution of the present invention, the second wall sound-absorbing panels in the contraction section and the diffusion section are connected to the steel truss by bolts.

[0012] As a preferred solution of the present invention, a plurality of embedded plates are arranged in the contraction section and the diffusion section, and flow channel silencer plates are installed on the embedded plates along the flow channel area; the embedded plates are arranged in a layer-by-layer array.

[0013] As a preferred solution of the present invention, one side of the wall partition rib is welded to the wall microporous plate through angle steel, and the other side is intermittently welded to the outer wall of the flow channel. Glass fiber cotton is filled between the wall microporous plate and the outer wall of the flow channel, and the glass fiber cotton is disconnected by the wall partition rib.

[0014] As a preferred solution of the present invention, one side of the flow channel partition rib is welded to the first flow channel microporous plate through angle steel, and the other side is intermittently welded to the second flow channel microporous plate. Glass fiber cotton is filled between the first flow channel microporous plate and the second flow channel microporous plate, and the glass fiber cotton is disconnected by the flow channel partition rib.

[0015] As a preferred solution of the present invention, the wall guide plate includes a wall rib plate, a wall partition plate and a wall skin. One end of the wall rib plate is connected to the wall skin through a bent angle steel, and the other end is connected to the wall partition plate, forming a single right-angled triangle. The side wall of the wall rib plate is connected to the wind tunnel wall panel.

[0016] As a preferred solution of the present invention, the flow channel guide plate includes a flow channel rib plate, a flow channel partition plate and a flow channel skin. The flow channel rib plate is laterally separated by the flow channel partition plate. The outer ends of the separated flow channel rib plate are connected to the flow channel skin through bent angle steel, forming two right-angled triangles.

[0017] Due to the adoption of the above technical solution, the present invention can achieve the following technical effects: by dividing the wind tunnel into multiple independent flow channels, a composite noise reduction technology combining resistive silencer and capacitive silencer is adopted in the wall and the flow channel, and the arrangement of the silencer plates is optimized. This technical solution not only achieves the effective suppression of broadband noise, but also significantly reduces the construction and maintenance costs of the noise reduction system. This solution can completely solve the noise leakage problem of large-scale wind tunnel laboratories, control the noise in the working area to below 65dB, completely eliminate the acoustic interference to the surrounding teaching areas, and provide the test personnel with a quiet working environment that meets occupational health standards. In addition, the modular silencer structure design is easy to install and maintain, and has significant engineering application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 This is a schematic elevation view of the combined noise reduction structure for the wind-wave combined laboratory of the present invention;

[0020] Figure 2 This is a schematic plan view of the combined noise reduction structure for the wind-wave combined laboratory of the present invention;

[0021] Figure 3 It is a partially enlarged schematic diagram of the wall sound-absorbing plate structure of the present invention;

[0022] Figure 4 It is a partial enlarged schematic diagram of the flow channel muffler plate structure of the present invention;

[0023] Figure 5 It is a partially enlarged schematic diagram of the wall guide plate structure of the present invention;

[0024] Figure 6 It is a partial enlarged schematic diagram of the flow channel guide plate structure of the present invention;

[0025] Explanation of the numbers in the figure: 1. Wind tunnel wall; 11. Embedded plate; 12. Third wall muffler; 13. Flow channel muffler; 14. Flow channel guide plate; 2. Wind tunnel body; 21. Contraction section; 22. Power section; 23. Diffusion section; 24. First wall muffler; 25. Wall guide plate; 3. Steel truss; 31. Leg support plate; 32. Fan; 33. Bolt; 34. Second wall Silencer plate; 4. Wall partition rib plate; 41. Wall microporous plate; 42. Outer wall of flow channel; 43. Angle steel; 44. Glass fiber wool; 51. First flow channel microporous plate; 52. Second flow channel microporous plate; 53. Flow channel partition rib; 61. Wall partition; 62. Wall skin; 63. Bent angle steel; 64. Wall rib plate; 71. Flow channel rib plate; 72. Flow channel skin; 73. Flow channel partition. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0027] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0029] In the description of this application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0031] Reference Figure 1-Figure 2 This embodiment provides a combined noise reduction structure for a wind and wave joint laboratory. The structure comprises a wind tunnel body formed by concrete wind tunnel walls, securely mounted on a steel truss. The wind tunnel body is composed of an aerodynamically optimized contraction section, a power section, and a diffuser section, connected in sequence. Several first-wall mufflers are installed on the circumferential walls of the contraction and diffuser sections. Each muffler has a wall guide plate fixedly connected at both ends. Flow channel mufflers and associated flow channel guide plates are positioned between adjacent first-wall mufflers to improve flow field uniformity and reduce impact forces on the wall.

[0032] The preferred solution includes: arranging a number of embedded plates on the west wall of the contraction section and the diffusion section in a layer-by-layer array layout, and installing flow channel silencer plates on the embedded plates, which can multiple-absorb the local noise of the flow channel, thereby further achieving the effect of reducing noise.

[0033] The power section is equipped with a high-performance fan, the bottom of which is firmly fixed to the support leg plate of the steel truss through support legs, effectively reducing vibration and noise;

[0034] A second wall muffler is added to the bottom of the contraction section and the diffusion section, which is securely connected to the steel truss with anti-loosening bolts to enhance the bottom noise reduction effect; a third wall muffler is symmetrically installed on the south and north walls of the wind tunnel to achieve wall muffler and wall sound insulation for the entire wind tunnel laboratory.

[0035] The contraction section and the diffusion section adopt an array-type embedded plate layout, which provides a modular installation basis for the flow channel silencer plate and is easy to maintain and replace.

[0036] Reference Figure 3-Figure 4 The silencer adopts an advanced composite structure: the wall silencer is composed of a wall microporous plate with high sound absorption efficiency and is arranged parallel to the outer wall of the flow channel. The middle is separated by staggered wall partition ribs and filled with ultra-fine glass fiber cotton to achieve broadband sound absorption; the flow channel silencer adopts a double-layer flow channel microporous plate structure design, with flow channel partition ribs arranged in the middle and filled with ultra-fine glass fiber cotton. Each microporous plate and ultra-fine glass fiber cotton are separated by high-density glass fiber cloth to prevent the glass fiber cotton from flying out.

[0037] Reference Figure 5-Figure 6, the guide structure is optimized in design: the wall guide plate is a single right-angled triangle structure, with the high-strength wall skin and partition connected by the wall ribs to ensure a smooth transition of the airflow; the flow channel guide plate adopts a double right-angled triangle structure, with the ribs separated by the flow channel partition and then connected to the streamlined skin, effectively reducing airflow separation and secondary noise.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A combined noise reduction structure for a wind-wave combined laboratory, characterized in that: It includes a wind tunnel wall and a wind tunnel body; the wind tunnel wall encloses to form the wind tunnel body, which is located on the steel truss and includes a contraction section, a power section and a diffusion section connected in sequence, and the power section is provided with a fan; a plurality of first wall silencers are installed on the circumferential wall surface of the contraction section and the diffusion section, a second wall silencer is provided at the bottom position, and a third wall silencer is provided on both sides of the inner surface of the wind tunnel wall, the first wall silencer, the second wall silencer and the third wall silencer have the same structure, and all include parallel wall microporous plates and the outer wall surface of the flow channel, and a plurality of wall partition ribs are provided between the two.

2. The combined noise reduction structure for a wind-wave combined laboratory according to claim 1, characterized in that: Both ends of the first wall silencer are fixedly connected with wall guide plates, and a flow channel silencer is provided between adjacent first wall silencers, which includes a first flow channel microporous plate and a second flow channel microporous plate arranged in parallel, with a number of flow channel partition ribs provided between the two.

3. The combined noise reduction structure for a wind-wave combined laboratory according to claim 2, characterized in that: Both ends of the flow channel muffler plate are fixedly connected with flow channel guide plates.

4. The combined noise reduction structure for a wind-wave combined laboratory according to claim 1, characterized in that: The bottom of the fan is connected to support legs, which are all fixed on the support leg support plates of the steel truss.

5. The combined noise reduction structure for a wind-wave combined laboratory according to claim 1, characterized in that: The second wall silencer panels in the contraction section and the diffusion section are connected to the steel truss by bolts.

6. The combined noise reduction structure for a wind-wave combined laboratory according to claim 2, characterized in that: Several embedded plates are arranged in the contraction section and the diffusion section, and flow channel silencer plates are installed on the embedded plates along the flow channel area; the embedded plates are arranged in a layer-by-layer array.

7. The combined noise reduction structure for a wind-wave combined laboratory according to claim 1, characterized in that: One side of the wall partition rib is welded to the wall microporous plate through angle steel, and the other side is intermittently welded to the outer wall of the flow channel. Glass fiber cotton is filled between the wall microporous plate and the outer wall of the flow channel, and the glass fiber cotton is disconnected by the wall partition rib.

8. The combined noise reduction structure for a wind-wave combined laboratory according to claim 2, characterized in that: One side of the flow channel partition rib is welded to the first flow channel microporous plate through angle steel, and the other side is intermittently welded to the second flow channel microporous plate. Glass fiber cotton is filled between the first flow channel microporous plate and the second flow channel microporous plate, and the glass fiber cotton is disconnected by the flow channel partition rib.

9. The combined noise reduction structure for a wind-wave combined laboratory according to claim 2, characterized in that: The wall guide plate includes a wall rib plate, a wall partition plate and a wall skin. One end of the wall rib plate is connected to the wall skin through a bent angle steel, and the other end is connected to the wall partition plate, forming a single right-angled triangle. The side wall of the wall rib plate is connected to the wind tunnel wall plate.

10. The combined noise reduction structure for a wind-wave combined laboratory according to claim 3, characterized in that: The flow channel guide plate includes a flow channel rib plate, a flow channel partition plate and a flow channel skin. The flow channel rib plate is laterally separated by the flow channel partition plate. The outer ends of the separated flow channel rib plate are connected to the flow channel skin through bent angle steels, forming two right-angled triangles.

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