A honeycomb rectifier noise reduction device

Abstract

The application relates to the technical field of experimental aerodynamics, in particular to a honeycomb rectifier noise reduction device, which comprises a cross-shaped support frame, an open-hole Kagome honeycomb rectifier assembly, a metal sintered wire screen assembly, a guide vane assembly and a positioning block, the cross-shaped support frame is detachably installed on the cross section of a wind tunnel pipeline, the positioning block is welded in the middle of each grid of the cross-shaped support frame and is used for positioning the open-hole Kagome honeycomb rectifier assembly, the metal sintered wire screen assembly is located on the front side of the open-hole Kagome honeycomb rectifier assembly, and the guide vane assembly is symmetrically arranged on the two sides of the cross-shaped support frame. The honeycomb rectifier noise reduction device can effectively improve the turbulence degree, the vortex distribution condition of the downstream and reduce the absolute value of the turbulence degree, so that good initial conditions are created for obtaining the isotropic turbulent flow with low turbulence degree in the test section.

Description

Technical Field

[0001] The invention relates to the technical field of experimental aerodynamics, in particular to a honeycomb rectifying and noise reduction device. Background Art

[0002] In a wind tunnel, in order to obtain uniform flow with low turbulence at the nozzle outlet, reduce the airflow pulsation during wind tunnel operation, and improve the quality of the wind tunnel flow field, it is necessary to arrange a series of rectifying devices in the stable section with a larger upstream area so that the large-scale, non-isotropic vortices generated upstream of the wind tunnel can be transformed into small-scale vortices under the action of inertial force, and the small-scale vortices can form fully developed turbulence under the action of viscous dissipation.

[0003] A rectifier is a rectifying device that can split large-scale vortices into small-scale vortices. It is generally composed of a damping mesh and a honeycomb. Due to the complexity of the rectifier flow field and the difficulty of simulation, the rectifying effect of a newly designed rectifier is generally evaluated by experimental methods. The structure of the honeycomb and its relative layout with the damping mesh have a significant impact on the rectifying effect.

[0004] High-quality flow fields in wind tunnels require low noise, low turbulence, and airflow deflection angles less than 0.05°. Future designs for low-speed and transonic wind tunnels with high flow field quality, down to 0.05% turbulence and local airflow deflection angles less than ±0.1°, are particularly important. Currently, the honeycomb structures used in large, transient high-speed wind tunnels primarily utilize a hexagonal structure, but research indicates that this structure cannot meet the comprehensive requirements for noise reduction and flow rectification.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The object of the present invention is to provide a honeycomb rectifying and noise reduction device, which is easy to disassemble and install, has a wide noise reduction frequency band, and can withstand a large impact load.

[0007] The present invention provides a honeycomb rectification and noise reduction device, comprising a crisscross support frame, an open-pore Kagome honeycomb rectification assembly, a metal sintered wire mesh assembly, a guide vane assembly and a positioning block, wherein the crisscross support frame is detachably mounted on the cross section of a wind tunnel duct, the positioning block is welded to the middle of each grid of the crisscross support frame and is used to position the open-pore Kagome honeycomb rectification assembly; the metal sintered wire mesh assembly is located on the front side of the open-pore Kagome honeycomb rectification assembly, and the guide vane assemblies are symmetrically arranged on both sides of the crisscross support frame.

[0008] As a preferred embodiment of the present technical solution, the open-cell Kagome honeycomb rectifier assembly includes an outer lattice frame and a thin-walled open-cell Kagome honeycomb, the outer lattice frame is welded to the outer edge of the thin-walled open-cell Kagome honeycomb, and is fixedly connected to the criss-cross support frame.

[0009] As a preferred technical solution of the present invention, the cell of the thin-walled perforated Kagome honeycomb is composed of a hexagon and 6 triangles located around the hexagon; the wall of the thin-walled perforated Kagome honeycomb is a low-temperature resistant and rust-proof metal material with a porosity of 0-60%; the ratio of the axial length of the airflow of the thin-walled perforated Kagome honeycomb to the diameter of the inscribed circle of the hexagon is greater than 10; a plurality of circular holes are evenly distributed on each surface of the thin-walled perforated Kagome honeycomb along the airflow direction, the aperture of the circular holes is 0-60% of the length of the hexagon side, and the distance between adjacent circular holes is 0.5-5 times the diameter of the circular holes.

[0010] As a preferred embodiment of the present invention, a porous thin wall is provided in the middle of the hexagonal symmetrical surface of the thin-walled open-cell Kagome honeycomb, and the porous thin wall is a low-temperature resistant and rust-proof metal material with an opening rate of 0-60%, or a sintered wire mesh with a mesh size of 10-300.

[0011] As a preferred embodiment of the present technical solution, the roughness Ra of the open-pore Kagome honeycomb rectifier assembly is less than 1.6, and the coaxiality is less than 0.05°.

[0012] As a preferred embodiment of the present technical solution, the guide vane assembly includes a front guide vane and a rear guide vane, and the front guide vane and the rear guide vane are symmetrically fixed at both ends of the crisscross support frame; the front guide vane fixes the open-hole Kagome honeycomb rectifier assembly and the metal sintered wire mesh assembly to the crisscross support frame by screws.

[0013] As a preferred embodiment of the present technical solution, the metal sintered wire mesh assembly includes a rear grid frame, a metal sintered wire mesh and a steel ring, the metal sintered wire mesh is fixedly connected to the rear grid frame or the steel ring, and the rear grid frame and the steel ring are both fixed in the groove of the front guide plate; the metal sintered wire mesh is located on the front side of the thin-walled open-pore Kagome honeycomb.

[0014] As a preferred embodiment of the present technical solution, transverse ribs, longitudinal ribs or oblique ribs are provided in the rear grid frame.

[0015] As a preferred embodiment of the present technical solution, the metal sintered wire mesh includes M layers of sintered wire mesh, and the mesh number of the sintered wire mesh is 10-300, wherein M is greater than or equal to 1.

[0016] As a preferred embodiment of the present technical solution, the wire diameter of the metal sintered wire mesh is 0.07-0.25 mm, and the deviation of the wire diameter is ≤5%.

[0017] The honeycomb rectification and noise reduction device of the present invention has at least the following technical effects:

[0018] 1. The open-cell Kagome honeycomb rectifying assembly in the honeycomb rectifying and noise reduction device of the present invention consists of a hexagon and six triangles located around the hexagon. This structure has advantages over the hexagonal structure in terms of load bearing, heat transfer, and turbulence reduction. In addition, the addition of an open-cell thin-walled structure on the symmetric plane of the hexagon reduces the size of the vortex with minimal material.

[0019] 2. The metal sintered wire mesh assembly in the honeycomb rectifying noise reduction device of the present invention adopts sintered wire mesh to achieve a wide noise reduction range, with a noise reduction amount of 4dB-15dB and a wide noise reduction frequency band, and has a good noise reduction effect on a wide frequency range of 0-40000Hz;

[0020] 3. The guide vane components in the honeycomb rectifying and noise reduction device of the present invention are symmetrically arranged on both sides of the crisscross support frame, and can be used for rectifying and reducing noise of the crisscross support frame;

[0021] 4. The honeycomb rectifying and noise reduction device of the present invention can effectively improve the turbulence and vorticity distribution of the downstream and reduce the absolute value of turbulence, thereby creating good initial conditions for obtaining isotropic turbulent flow with low turbulence in the test section;

[0022] 5. The honeycomb rectification and noise reduction device of the present invention is installed on a cross-shaped support frame through a detachable open-pore Kagome honeycomb rectification assembly. The open-pore Kagome honeycomb rectification assembly and the metal sintered wire mesh assembly can be used for a long time after the permeability is restored by ultrasonic cleaning. Therefore, the present invention has a reasonable and simple structure, is easy to disassemble and install, has a wide noise reduction frequency band, and can withstand large impact loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a front view of the honeycomb rectification and noise reduction device of the present invention;

[0025] Figure 2 This is a left view of the honeycomb rectification and noise reduction device of the present invention;

[0026] Figure 3 This is a diagram showing the fixing of the Kagome honeycomb rectification assembly and the crisscross support frame of the honeycomb rectification and noise reduction device of the present invention;

[0027] Figure 4 Schematic diagram of the open-cell Kagome honeycomb rectifier assembly of the present invention;

[0028] Figure 5 Schematic diagram of the thin-walled open-cell Kagome honeycomb of the present invention;

[0029] Figure 6 Schematic diagram of a conventional hexagonal honeycomb structure;

[0030] Figure 7 Schematic diagram of the thin-walled open-cell Kagome honeycomb cell of the present invention;

[0031] Figure 8 Schematic diagram of the porous light band corrugated board of the present invention with staggered arrangement of semi-regular hexagons and equilateral triangles;

[0032] Figure 9 Schematic diagram of the thin-walled open-cell Kagome honeycomb with open cells on the symmetrical surface of the present invention;

[0033] Figure 10 Schematic diagram of the process for adding openings and thin walls to the symmetrical surface of a hexagonal honeycomb;

[0034] Figure 11 Schematic cross-sectional view of the hexagonal positioning rod of the present invention;

[0035] Figure 12 This is a front view of the hexagonal positioning rod of the present invention;

[0036] Figure 13 The main view of the metal sintered wire mesh component of the present invention Figure 1 ;

[0037] Figure 14 The left side view of the metal sintered wire mesh component of the present invention Figure 1 ;

[0038] Figure 15 The main view of the metal sintered wire mesh component of the present invention Figure 2 ;

[0039] Figure 16 Schematic diagram of the metal sintered wire mesh assembly of the present invention covered with wind tunnel pipes Figure 1 ;

[0040] Figure 17 Schematic diagram of the metal sintered wire mesh assembly of the present invention covered with wind tunnel pipes Figure 2 .

[0041] Description of reference numerals:

[0042] 1: T-shaped support frame; 2: Open-cell Kagome honeycomb rectifier assembly; 3: Metal sintered wire mesh assembly; 4: Positioning block; 5: External grid frame; 6: Thin-walled open-cell Kagome honeycomb; 7: Porous thin wall; 8: Front guide vane; 9: Rear guide vane; 10: Rear grid frame; 11: Metal sintered wire mesh; 12: Steel ring; 13: Wind tunnel duct. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" and the like to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0045] 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 indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0046] like Figure 1-17As shown, the present invention provides a honeycomb rectification and noise reduction device, comprising a crisscross support frame 1, an open-pore Kagome honeycomb rectification assembly 2, a metal sintered wire mesh assembly 3, a guide vane assembly and a positioning block 4. The crisscross support frame 1 can be detachably mounted on the cross section of a wind tunnel duct 13. The positioning block 4 is welded to the middle of each grid of the crisscross support frame 1 for positioning the open-pore Kagome honeycomb rectification assembly 2; the metal sintered wire mesh assembly 3 is located on the front side of the open-pore Kagome honeycomb rectification assembly 2, and the guide vane assemblies are symmetrically arranged on both sides of the crisscross support frame 1.

[0047] The honeycomb rectification and noise reduction device of the present invention includes a crisscross support frame 1, an open-cell Kagome honeycomb rectification assembly 2, a metal sintered wire mesh assembly 3, a guide vane assembly, and a positioning block 4. The crisscross support frame 1 is composed of a plurality of horizontal and vertical strips that are welded together, and its structure is determined by the mechanical properties and maximum total pressure differential of the open-cell Kagome honeycomb rectification assembly 2 and the metal sintered wire mesh assembly. The support form and structure of the metal sintered wire mesh assembly 3 are designed based on the strength and stiffness of the open-cell Kagome honeycomb rectification assembly 2; and the frame structure is designed based on the maximum cross-sectional pressure differential and cross-sectional area to determine the maximum load. During use, the open-cell Kagome honeycomb rectification assembly 2 is manufactured as a module that can be independently installed and removed, and is integrally mounted and fixed to the crisscross support frame 1. Here, N open-cell Kagome honeycomb rectification assemblies 2 are provided, where N is the number of meshes within the crisscross support frame 1. The crisscross support frame 1 is fixedly mounted on the cross section of the wind tunnel duct 13. The metal sintered wire mesh component 3 and the open-pore Kagome honeycomb rectifier component 2 can be used for a long time after the permeability is restored by ultrasonic cleaning.

[0048] A positioning block 4 is provided in the middle of each inner wall of each grid of the tic-tac-toe support frame 1. The positioning block 4 is welded to the tic-tac-toe support frame 1 and is used to position the open-pore Kagome honeycomb rectifier assembly 2. The metal sintered mesh assembly is located on the front side of the open-pore Kagome honeycomb rectifier assembly 2. The positioning block 4 enables the open-pore Kagome honeycomb rectifier assembly 2 and the metal sintered mesh assembly to be inserted into the corresponding grids of the tic-tac-toe support frame 1, and the metal sintered mesh assembly can be flush with the surface of the tic-tac-toe support frame 1.

[0049] When the noise reduction performance is reduced by 10%, the metal sintered wire mesh 11 assembly 3 is removed from the crisscross support frame 1 and the metal sintered wire mesh assembly 3 is placed in an ultrasonic cleaning machine for ultrasonic cleaning. When the permeability reaches 5.47×10 -3 L / (min·cm 2 Pa), the original noise reduction capability can be restored.

[0050] Therefore, the honeycomb rectification and noise reduction device of the present invention has a reasonable and simple structure and is easy to disassemble and install. Compared with the traditional hexagonal honeycomb, it has a better rectification effect, a wider noise reduction band, and can withstand a larger impact load.

[0051] On the basis of the above technical solution, the open-cell Kagome honeycomb rectifier assembly 2 further includes an outer lattice frame 5 and a thin-walled open-cell Kagome honeycomb 6. The outer lattice frame 5 is welded to the outer edge of the thin-walled open-cell Kagome honeycomb 6 and is fixedly connected to the criss-cross support frame 1. The outer lattice frame 5 here is mainly used to support the thin-walled open-cell Kagome honeycomb 6.

[0052] Specifically in this embodiment, the cell of the thin-walled perforated Kagome honeycomb 6 is composed of a hexagon and 6 triangles located around the hexagon; the wall of the thin-walled perforated Kagome honeycomb 6 is a low-temperature resistant and rust-proof metal material with an opening rate of 0-60%; the ratio of the axial length of the airflow of the thin-walled perforated Kagome honeycomb 6 to the diameter of the inscribed circle of the hexagon is greater than 10; each surface of the thin-walled perforated Kagome honeycomb 6 is evenly distributed with a plurality of circular holes along the airflow direction, the aperture of the circular holes is 0-60% of the length of the hexagon side, and the distance between adjacent circular holes is 0.5-5 times the diameter of the circular holes.

[0053] The total open porosity of the honeycomb rectification and noise reduction device of the present invention ranges from 0% to 60%, which is a relatively suitable design parameter for open-wall honeycombs. Furthermore, compared to traditional solid-wall hexagonal structures, the thin-walled open-cell Kagome honeycomb 6 structure of the present invention offers potential advantages in load transfer, heat transfer, and flow stability, even at comparable sizes.

[0054] Based on the above technical solution, it is further preferred that a porous thin wall 7 be provided between the hexagonal symmetric planes of the thin-walled open-cell Kagome honeycomb 6. The porous thin wall 7 is made of a low-temperature resistant and rust-resistant metal material with a porosity of 0-60%, or a sintered wire mesh with a mesh size of 10-300. The porous thin wall 7 can divide a large Kagome hexagonal structure into two small trapezoidal structures by one edge, reducing the size of the vortex with minimal material, which is more conducive to vortex breaking, flow diversion, noise reduction, and heat transfer. The porous thin wall 7 can be cleaned ultrasonically, and the sintered wire mesh can be reused after its permeability is restored.

[0055] The roughness Ra of the open-hole Kagome honeycomb rectifier assembly 2 used in this embodiment is less than 1.6, and the coaxiality is less than 0.05°. Specifically, it can be processed by welding forming technology. First, in order to ensure its parallelism, a zero-backlash gear rolling device driven by a servo motor is used to roll the thin-walled flat porous plate to roughly process the light band shape of semi-regular hexagons and equilateral triangles that are staggered, and then corrugated to form a corrugated plate. Then, the automated stamping and shaping die driven by the crank slider movement is used to achieve fine finishing, and then the corrugated plate is clamped and fixed with a special fixture, and the light bands of the open-hole semi-regular hexagons and equilateral triangles that are staggered are pressed. Figure 9 The left picture shows repeated arrangement, and the corrugated sheets are connected into honeycomb core by welding to form the required size of the open-cell Kagome honeycomb. Figure 9 The right figure is repeatedly arranged to form an improved open-cell Kagome honeycomb with a neutral plane. Similarly, the conventional hexagonal honeycomb can also be Figure 10 The method shown forms a reinforced open-cell hexagonal honeycomb.

[0056] In addition, if Figure 11-12 To prevent welding misalignment, the present invention also designs a series of lightweight hexagonal positioning mandrels with slits. These are positioned and installed on the honeycomb core before welding. Thin walls are welded using methods such as electric welding or vacuum brazing, with evenly spaced or full welds. The ends of the hexagonal positioning mandrels use adjacent size series, such as 25mm / 20mm. The three diagonal lines of the hexagon are divided into three commonly used slit thicknesses, T series, such as 0.2mm, 0.3mm, and 0.4mm.

[0057] On the basis of the above technical solution, further, the guide plate assembly includes a front guide plate 8 and a rear guide plate 9, and the front guide plate 8 and the rear guide plate 9 are symmetrically fixed at both ends of the crisscross support frame; the front guide plate 8 fixes the open-hole Kagome honeycomb rectifier assembly 2 and the metal sintered wire mesh assembly 3 on the crisscross support frame 1 through screws.

[0058] Specifically, the front guide vane 8 and the rear guide vane 9 are fixed to the crisscross support frame 1 by screws. The front guide vane 8 is arranged symmetrically with respect to the center line of the crisscross support frame 1, and the front guide vane 8 and the rear guide vane 9 correspond one to one with the position and size of the crisscross support frame 1 and are fixed together to minimize the resistance of the airflow to the crisscross support frame 1 and avoid flow separation.

[0059] On the basis of the above technical solution, it is further preferred that the metal sintered mesh assembly is located in front of the open-cell Kagome honeycomb rectifying assembly 2, and specifically, the metal sintered wire mesh assembly 3 includes a rear grid frame 10, a metal sintered wire mesh 11 and a steel ring 12, the metal sintered wire mesh 11 is fixedly connected to the rear grid frame 10 or the steel ring 12, and the rear grid frame 10 and the steel ring 12 are both fixedly arranged in the groove of the front guide plate 8; the metal sintered wire mesh 11 is located in front of the thin-walled open-cell Kagome honeycomb 6.

[0060] Among them, the rear grid frame 10 is made of thin-walled metal material and is welded with horizontal ribs, longitudinal ribs or oblique ribs. Figure 12-15 As shown, it can be a rectangular combination or a triangular combination. The schematic diagram after it is installed in the entire wind tunnel duct 13 is as follows Figure 16-17 shown.

[0061] To further enhance the honeycomb rectifying noise reduction device's aerodynamic noise reduction across a wide frequency range, the metal sintered wire mesh 11 used comprises M layers of sintered wire mesh, with a mesh count ranging from 10 to 300, where M is greater than or equal to 1. Furthermore, the metal sintered wire mesh 11 can be laser welded to the rear grid frame 10 or welded to the steel ring 12, and then installed within the groove of the front guide vane 8.

[0062] The metal sintered wire mesh 11 is a sintered porous material, which is made by overlapping multiple layers of metal sintered wire mesh 11 and sintering them under vacuum according to a certain process, and has good permeability. In addition, it can also be a sintered wire mesh made of one or more layers of laser sintering, with a mesh size of 20-200.

[0063] The excellent metal sintered wire mesh 11 has the following characteristics: A. excellent permeability; B. controllable pore size and porosity; C. high strength and good toughness; D. good regeneration performance; E. good machinability.

[0064] The mesh size and number of layers of the sintered metal mesh 11 are selected based on preliminary testing to determine its noise reduction and pressure loss characteristics. The optimal noise reduction / pressure loss values ​​across the entire flow rate range are determined through testing. One or more sets of meshes are selected for installation based on the noise reduction design requirements. The wire diameter of the sintered metal mesh 11 is preferably 0.07mm-0.25mm, with a strictly controlled wire diameter deviation of ≤5%. This ensures sufficient strength and consistent air permeability. Each piece of sintered metal mesh 11 achieves a noise reduction of approximately 1dB-15dB.

[0065] The materials of various components in the honeycomb rectifying and noise reduction device of the present invention are all made of low-temperature-resistant and rust-proof metal materials.

[0066] Furthermore, in another embodiment of the present invention, the metal sintered wire mesh assembly 3 and the open-cell Kagome honeycomb rectifying assembly 2 can be staggered front and back to achieve graded noise reduction. Their narrow side dimensions are smaller than the installation manhole, facilitating quick replacement of any module through the manhole. Alternatively, the honeycomb rectifying noise reduction device can be arranged at regular intervals within the wind tunnel duct 13 to achieve graded noise reduction.

[0067] In summary, the honeycomb rectification and noise reduction device of the present invention integrates the noise reduction effect of the metal sintered wire mesh 11 and the rectification effect of the open-pore Kagome honeycomb rectification assembly 2, and reduces the installation time in the pipeline through modular ground installation. In addition, it can also be installed through modularization and a criss-cross support frame 1 to solve the installation problem of the open-pore Kagome honeycomb rectification and noise reduction device with a small processing size in a large pipeline.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A honeycomb rectification and noise reduction device, characterized in that: It includes a well-shaped support frame (1), an open-hole Kagome honeycomb rectifying assembly (2), a metal sintered wire mesh assembly (3), a guide plate assembly and a positioning block (4), The crisscross support frame (1) is detachably mounted on the cross section of the wind tunnel duct (13); the positioning block (4) is welded to the middle of each grid of the crisscross support frame (1) and is used to position the open-cell Kagome honeycomb rectifier assembly (2); The metal sintered wire mesh assembly (3) is located on the front side of the open-pore Kagome honeycomb rectifying assembly (2), and the guide vane assembly is symmetrically arranged on both sides of the well-shaped support frame (1); The open-cell Kagome honeycomb rectifying assembly (2) comprises an outer grid frame (5) and a thin-walled open-cell Kagome honeycomb (6). The outer grid frame (5) is welded to the outer edge of the thin-walled open-cell Kagome honeycomb (6) and is fixedly connected to the well-shaped support frame (1); The thin-walled open-cell Kagome honeycomb (6) consists of a hexagon and six triangles located around the hexagon; The wall surface of the thin-walled open-pore Kagome honeycomb (6) is made of a low-temperature resistant and rust-proof metal material with an opening rate of 0-60%; The ratio of the airflow axial length of the thin-walled open-cell Kagome honeycomb (6) to the diameter of the hexagonal inscribed circle is greater than 10; Each surface of the thin-walled open-cell Kagome honeycomb (6) is uniformly distributed with a plurality of circular holes along the airflow direction, wherein the diameter of the circular holes is 0-60% of the length of the hexagonal side, and the distance between adjacent circular holes is 0.5-5 times the diameter of the circular holes; The thin-walled open-cell Kagome honeycomb (6) has a porous thin wall (7) disposed in the middle of the hexagonal symmetric surface. The porous thin wall (7) is a low-temperature resistant and rust-proof metal material with an opening rate of 0-60%, or a sintered wire mesh with a mesh number of 10-300 meshes.

2. The honeycomb rectification and noise reduction device according to claim 1, characterized in that: The roughness Ra of the open-cell Kagome honeycomb rectifier assembly (2) is less than 1.6, and the coaxiality is less than 0.

05. o .

3. The honeycomb rectification and noise reduction device according to claim 1, characterized in that: The guide plate assembly comprises a front guide plate (8) and a rear guide plate (9), wherein the front guide plate (8) and the rear guide plate (9) are symmetrically fixed at two ends of the well-shaped support frame; The front guide plate (8) fixes the open-hole Kagome honeycomb rectifying assembly (2) and the metal sintered wire mesh assembly (3) on the well-shaped support frame (1) through screws.

4. The honeycomb rectification and noise reduction device according to claim 3, characterized in that: The metal sintered wire mesh assembly (3) comprises a rear grid frame (10), a metal sintered wire mesh (11) and a steel ring (12). The metal sintered wire mesh (11) is fixedly connected to the rear grid frame (10) or the steel ring (12), and the rear grid frame (10) and the steel ring (12) are both fixedly arranged in the groove of the front guide plate (8); The metal sintered wire mesh (11) is located on the front side of the thin-walled open-pore Kagome honeycomb (6).

5. The honeycomb rectification and noise reduction device according to claim 4, characterized in that: The rear grid frame (10) is provided with transverse ribs, longitudinal ribs or oblique ribs.

6. The honeycomb rectification and noise reduction device according to claim 4, characterized in that: The metal sintered wire mesh (11) comprises M layers of sintered wire mesh, and the mesh number of the sintered wire mesh is 10-300, wherein M is greater than or equal to 1.

7. The honeycomb rectification and noise reduction device according to claim 4, characterized in that: The wire diameter of the metal sintered wire mesh (11) is 0.07-0.25 mm, and the deviation of the wire diameter is ≤5%.

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