CN217179873U

CN217179873U - Corner guide vane assembly

Info

Publication number: CN217179873U
Application number: CN202123224391.XU
Authority: CN
Inventors: 王夫亮
Original assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Current assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-08-12
Anticipated expiration: 2031-12-21

Abstract

The utility model provides a turning water conservancy diversion piece subassembly for runner in the car wind-tunnel test, turning water conservancy diversion piece subassembly includes a plurality of the same turning water conservancy diversion pieces and arranges the corner of runner, wherein, turning water conservancy diversion piece with the parallel cross section of flow direction of fluid in the runner constructs into arc, and a plurality of turning water conservancy diversion pieces are arranged for evenly spaced apart ground each other.

Description

Corner guide vane assembly

Technical Field

The utility model relates to an automobile wind tunnel test technical field especially relates to a turning water conservancy diversion piece subassembly that is arranged in runner in automobile wind tunnel test.

Background

The flow channel is special equipment for testing and developing the flow performance of the automobile, and mainly has the functions of generating a required flow field and accurately measuring flow parameters generated by interaction of the flow field and a test model.

The backflow type flow channel for the automobile wind tunnel test generally has 4 corners, and because the flowing direction of the flowing medium at the corners of the backflow type flow channel is suddenly changed, the flowing medium is easy to separate at the corners, so that high turbulence is generated, the quality of a flow field is influenced, and more energy is consumed.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved in one aspect of the present invention is how to reduce the flow separation of the flowing medium at the corners of the flow channel.

Furthermore, other aspects of the present invention are also directed to solving or alleviating other technical problems in the prior art.

The utility model provides a turning water conservancy diversion piece subassembly particularly, according to the utility model discloses an aspect provides:

a corner vane assembly for a flow channel in an automotive wind tunnel test, comprising a plurality of identical corner vanes and being arranged at the corners of the flow channel, wherein a cross section of the corner vane parallel to the flow direction of a fluid in the flow channel is configured in the shape of a circular arc and the plurality of corner vanes are arranged evenly spaced apart with respect to each other.

Optionally, according to an embodiment of the invention, the corner guide vanes are configured to have a uniform thickness.

Optionally, according to an embodiment of the present invention, the thickness of the corner guide is gradually reduced in a direction from the center of the cross section to both ends of the cross section.

Optionally, according to an embodiment of the invention, the plurality of corner deflectors are arranged in line at the position where two flow channel sections forming the corner intersect.

Optionally, according to an embodiment of the invention, the central angle of the circular arc-shaped cross-section of the corner baffle is between 95 ° and 105 °.

Optionally, according to an embodiment of the present invention, a ratio of a spacing between two adjacent corner deflectors to a chord length of a circular arc of a cross section of the corner deflector is between 0.3 and 0.4.

Optionally, according to an embodiment of the present invention, the corner guide vane assembly comprises 8 corner guide vanes.

Optionally, according to an embodiment of the present invention, the corner guide vane assembly comprises 6 corner guide vanes.

Optionally, according to an embodiment of the present invention, the corner guide vane assembly comprises 13 corner guide vanes.

Optionally, according to an embodiment of the present invention, an angle between a tangent at an end of the arc-shaped cross section of the corner baffle to which the fluid flows and a direction in which the fluid flows is 4 ° or less.

The utility model discloses an useful part includes: the utility model discloses a turning water conservancy diversion piece passes through streamlined curved surface appearance design, and the surface design of following flow direction is the curved surface of mild transition, and the guide air current steadily smoothly passes through the runner turning, and the at utmost avoids the air current separation, reduces the flow resistance to improve the flow field quality in the runner, save the required energy consumption of drive flow medium, improve energy utilization efficiency.

Drawings

The above and other features of the present invention will become apparent with reference to the accompanying drawings, in which,

fig. 1 shows a schematic cross-sectional view of a corner baffle assembly according to a first embodiment of the present invention arranged in a flow channel;

fig. 2 shows a schematic cross-sectional view of a corner baffle assembly according to a second embodiment of the present invention arranged in a flow channel.

Detailed Description

It is easily understood that, according to the technical solution of the present invention, a person skilled in the art can propose various alternative structural modes and implementation modes without changing the essential spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present invention, and should not be considered as limiting or restricting the technical solutions of the present invention in their entirety or in any other way.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," "third," and the like are used for descriptive and descriptive purposes only and not for purposes of indication or implication as to the relative importance of the respective components.

Referring to fig. 1, there is shown a schematic cross-sectional view of a corner baffle assembly 10 arranged in a flow passage 20 according to a first embodiment of the present invention. According to the utility model discloses a runner 20 that turning water conservancy diversion piece subassembly 10 was used for in the car wind tunnel test. The corner baffle assembly 10 comprises a plurality of identical corner baffles 11 and is arranged at the corners of the flow channel 20. For convenience of description, the flow direction of the fluid in the left flow path segment 21 in fig. 1 is defined as flowing from left to right, and the flow direction of the fluid in the right flow path segment 22 in fig. 1 is defined as flowing from bottom to top. As shown in fig. 1, the corner of the flow duct 10 is formed, for example, by two straight

flow duct sections

21, 22, the walls of which 21, 22 are rounded at the corner. In fig. 1, a cross section of the corner baffle 11 is shown parallel to the flow direction of the fluid in the flow channel 20, i.e. parallel to both the flow directions of the fluid in the

flow channel sections

21, 22, and the end portions of the corner baffle 11, which are referred to hereinafter, are the end portions of the corner baffle 11 as seen in the direction of the cross section thereof. The cross section of the corner baffle 11 is configured as a circular arc, the curvature direction of which corresponds approximately to the direction of the fillet formed by the walls of the two

flow channel sections

21, 22 at the corner. The corner guide vanes 11 are configured as lamellae with a circular-arc-shaped cross-section, the length of which in a direction perpendicular to the plane of fig. 1 is the same as the width of the flow channel 20 in a direction perpendicular to the plane of fig. 1. In the case of fig. 1, the fluid flows in from the lower flow channel section 21, contacts the corner guide 11 from one end 111 of the corner guide 11, and is then guided upward due to the arc shape in which the corner guide 11 is bent upward. When the fluid flows out from a position close to the other end of the corner baffle 11, the flow direction of the fluid has changed direction to flow substantially from bottom to top.

The corner baffles 11 in fig. 1 have a uniform thickness and the corner baffles 11 in fig. 1 are arranged evenly spaced with respect to each other. The plane of intersection of the flow channel section 21 and the flow channel section 22 is defined as the plane of intersection, i.e. the walls of the horizontal flow channel section 21 and the vertical flow channel section 22 extend in the horizontal direction and the vertical direction, respectively, and the intersection points of the inner wall and the outer wall of the horizontal flow channel section 21 and the vertical flow channel section 22 are connected to form a straight line, and the plane where the straight line is perpendicular to the plane of fig. 1 is the plane of intersection. The corner baffles 11 are arranged in said intersecting plane, which is shown in fig. 1 as a dashed line across the flow channel 20. A plurality of corner guide vanes 11 are arranged evenly spaced apart and in line on the intersection plane of the two

flow channel sections

21, 22. This makes it possible to uniformly change the flow direction of the flowing medium at different positions in the flow channel 20 according to the flow velocity thereof, and to generate a high degree of turbulence less easily. Preferably, the circle center of the circular arc of the cross section of the corner baffle 11 is also arranged exactly on said intersection plane, in particular shown in fig. 1 as being arranged on an imaginary line crossing the flow channel 20. In addition, arranging the plurality of corner baffles 11 on the intersection plane of the two

flow channel sections

21, 22 may allow for a larger number of corner baffles 11 to be arranged than arranging the plurality of corner baffles 11 horizontally or vertically, to make the flow of the flowing medium more uniform. In the embodiment according to fig. 1, 8 corner guide vanes are placed at the corners. The number of the corner guide vanes 11 is an optimum number obtained through experiments, and if the number is too large, the flow area of the fluid medium is reduced, the flow velocity is increased, the turbulence thereof is increased, and flow separation is generated, and if the number is too small, the flow guiding effect is reduced, and the flow uniformity is affected.

The central angle of the circular arc-shaped cross-section of the corner baffle 11 is between 95 ° and 105 ° (including 95 ° and 105 °). If the central angle is too small, the flow direction of the fluid medium cannot be completely changed by approximately 90 ° as in fig. 1, whereas if the central angle is too large, the flow direction of the fluid medium is changed by more than 90 °, both of which lead to high turbulence.

In this embodiment, the ratio of the spacing between two adjacent corner baffles 11 to the chord length of the arc of the cross-section of the corner baffles 11 is between 0.3 and 0.4. The angle between the tangent at the end 111 on the left side of the cross section of the plurality of corner baffles 11, i.e. the end 111 to which the fluid in the left-hand flow channel section 21 flows, and the direction to which the flowing medium flows is not more than 4 °. This angle may also be referred to as the mounting angle of the corner guide 11. The ratio of the pitch to the chord length of the corner baffle 11 and the mounting angle are determined experimentally to ensure that flow separation is more favorably reduced and flow is more uniform at such ratios and mounting angles.

Referring to fig. 2, there is shown a schematic cross-sectional view of a corner baffle assembly 100 arranged in a flow channel 200 according to a second embodiment of the present invention. The corner guide 101 of the embodiment of fig. 2 has a decreasing thickness in the direction from the centre of the cross-section to the ends of the cross-section. In the embodiment of fig. 2, the number of corner guide vanes 101 is 6, such corner guide vanes 101 may also be 13, which are not shown in fig. 2. The mounting angle of the corner guide 101 of the embodiment of fig. 2 is the same as the mounting angle 101 requirement of the embodiment of fig. 1. Since the overall thickness of the corner baffle 101 is now small, the cross-section of the corner baffle 101 by default has only one chord length of a circular arc, i.e. the chord length of the edge of the corner cross-section 101 below.

It should be understood that all of the above preferred embodiments are exemplary and not restrictive, and that various modifications and changes in the specific embodiments described above, which may occur to those skilled in the art upon reading the teachings of the present invention, are intended to be within the scope of the appended claims.

Claims

1. A corner baffle assembly for a flow channel in an automotive wind tunnel test, the corner baffle assembly comprising a plurality of identical corner baffles and being arranged at the corners of the flow channel, characterized in that the cross section of the corner baffles parallel to the flow direction of the fluid in the flow channel is configured as a circular arc and the plurality of corner baffles are arranged evenly spaced apart with respect to each other.

2. The corner baffle assembly of claim 1, wherein the corner baffle is configured to have a uniform thickness.

3. The corner baffle assembly of claim 1, wherein the thickness of the corner baffle tapers in a direction from the center of the cross-section to both ends of the cross-section.

4. The corner baffle assembly of any one of claims 1 to 3, wherein the plurality of corner baffles are arranged in a line at the location of the intersection of two flow channel segments forming the corner.

5. The corner baffle assembly of any one of claims 1 to 3, wherein the corner baffle has a circular arc cross-section with a central angle of between 95 ° and 105 °.

6. The corner baffle assembly of any one of claims 1 to 3, wherein the ratio of the spacing between two adjacent corner baffles to the chord length of the arc of the cross section of the corner baffle is between 0.3 and 0.4.

7. The corner baffle assembly of claim 2, wherein the corner baffle assembly comprises 8 of the corner baffles.

8. The corner baffle assembly of claim 3, wherein the corner baffle assembly comprises 6 of the corner baffles.

9. The corner baffle assembly of claim 3, wherein the corner baffle assembly comprises 13 of the corner baffles.

10. The corner baffle assembly of any one of claims 1 to 3, wherein an angle between a tangent at an end of the arc-shaped cross-section of the corner baffle to which fluid flows and a direction in which fluid flows is 4 ° or less.