CN113091502A

CN113091502A - Opposite-penetrating triangular vortex generator

Info

Publication number: CN113091502A
Application number: CN202110288183.1A
Authority: CN
Inventors: 付婷; 王江波; 王海均
Original assignee: Wuhan University of Science and Engineering WUSE
Current assignee: Wuhan University of Science and Engineering WUSE
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-07-09
Also published as: CN113639578A

Abstract

本发明专利涉及到一种对穿三角形涡流发生器，在实施方式中，该三角形小翼对涡流发生器主要包括：空气动力表面，对穿三角形小翼。其中空气动力表面主要分为：空气流入段，涡流发生段以及空气流出段，其中涡流发生段主要是对穿三角形与空气动力表面相互作用形成。三角形小翼的尺寸以及三角形小翼带有的开口的形状及尺寸，在空气动力表面的分布的距离以及旋转角度都能使得涡流发生器引起的涡旋结构及其管内温度分布。本发明主要对其中一种实施方式进行说明。The patent of the present invention relates to a penetrating triangular vortex generator. In an embodiment, the triangular winglet vortex generator mainly includes: an aerodynamic surface and a penetrating triangular winglet. The aerodynamic surface is mainly divided into: the air inflow section, the vortex generation section and the air outflow section, in which the vortex generation section is mainly formed by the interaction of the opposite triangle and the aerodynamic surface. The size of the triangular winglet and the shape and size of the opening with the triangular winglet, the distribution distance on the aerodynamic surface and the rotation angle can all make the vortex structure caused by the vortex generator and its temperature distribution in the tube. The present invention mainly describes one of the embodiments.

Description

Opposite-penetrating triangular vortex generator

Technical Field

The invention relates to a vortex generator, in particular to a vortex generator with an aerodynamic surface for heat transfer, and discloses a cross-triangular vortex generator.

Background

Vortex generators are widely used in heat exchange equipment as a simple and effective heat exchange enhancement device. The heat exchange methods commonly used include an active method, a passive method and a mixed method. The passive method is widely used in industry because of its simple structure. The vortex generator is used as a simple reinforced heat exchange mechanism, and has the advantages of simple manufacturing process, stable performance and the like, so that the vortex generator is widely applied to a plurality of passive heat exchange devices. Meanwhile, as is well known, the vortex generator can play an important role in inducing multiple longitudinal vortexes in the liquid flowing process, so as to effectively destroy and reduce the thickness of a thermal boundary layer. Furthermore, any slight variation in the shape, position and angle of attack of the vortex generators will produce a different flow field.

Disclosure of Invention

The invention provides a through triangular vortex generator which mainly generates vortex through a through triangular structure. Wherein the pitch of the opposing triangular winglet and the size of each triangular winglet and the size of the rectangular opening above the winglet (the aspect ratio is a primary consideration in the present invention) are important parameters in influencing the heat transfer of the fluid.

The main structure of the opposite-penetrating triangular vortex generator is as follows: the air inflow section, the vortex generation section, the air outflow section and the opposite-passing triangle. The structure of the vortex generator plays an important role in the passive heat exchange mode. The invention adopts the opposite-through triangular structure, and is worth explaining that the shape and the size of the triangular winglet in the opposite-through triangular structure are all very critical, and a rectangular opening is reserved at the upper end of the triangular winglet, which is in contact with the aerodynamic surface.

The through triangular main structure comprises a central support rod and a triangular winglet with a rectangular opening. Triangular winglets with rectangular openings are uniformly arranged on the central supporting rod around the uniform section, and the triangular winglets and the central supporting rod form an included angle of 30 degrees. The central support rod is provided with three groups of triangular winglets, and the distance between the two groups of triangular winglets is a screw pitch.

Other objects and advantages of the disclosed vortex generators will be apparent from the following description, the accompanying drawings and the appended claims.

Drawings

In order to more clearly illustrate the implementation and embodiment of the present invention, the drawings used in the description of the implementation and embodiment of the present invention will be briefly introduced below, and it is obvious that the drawings described below are only a part of the present invention, and those skilled in the art can obtain other drawings without creative efforts.

Fig. 1 is an overall view through a triangular vortex generator, where the dimensions are only a part of the invention.

Fig. 2 is a diagram of the vortex generation of a through triangular vortex generator, and fig. 2a is an overall view of the vortex generation section, from which the mounting of the through triangle on the aerodynamic surface can be seen. Figure 2b is a side view of the vortex generator. Fig. 2c shows a detail of the section where the vortex is generated, and the flow direction of the air and the details of the triangle and the wall are visible in the collision.

Fig. 3 is a triangular winglet dimension diagram, in fig. 3a, the surface a is the contact surface of the triangular winglet and the wall surface, and fig. 3b is a triangular specific dimension.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention bisects a triangular vortex generator. In the figure, the inner and outer surfaces of the air inflow section 1, the vortex generation section 2 and the air outflow section 3 are completely superposed and have the same coaxiality to form an aerodynamic surface together. The 4-sided triangle in the figure mainly comprises a central strut and triangular winglets with rectangular openings.

Referring to fig. 2, a vortex generation section. In fig. 2a, the opposite-penetrating triangle is inserted into the aerodynamic surface tube with the inner diameter D, and the fixation of the opposite-penetrating triangle and the wall surface can be achieved by the tension of the opposite-penetrating triangle and the aerodynamic surface in the scene with low air flow rate, and the opposite-penetrating triangle is required to be connected to the aerodynamic surface in the scene with high air flow rate.

Referring to fig. 2a, the bisecting triangle consists of a central strut and triangular winglets with openings. In one embodiment of the invention, the triangular winglets are provided with rectangular openings, the six triangular winglets are uniformly distributed on the same section of the central strut, the included angle alpha between each triangular winglet and the central strut is 30 degrees, and the distance between every two groups of triangular winglets is L and is called the pitch. Fig. 2b is a side view of a vortex generating section.

Referring to figure 2c, enlarged detail of the triangular winglet aerodynamic surface contact is shown, each triangular winglet having a deshook surface a at its open end to match the aerodynamic surface. The dotted line in the figure indicates the air flow direction.

Referring to figure 3a, a triangular winglet perspective view is shown, where the plane a is the curved surface of the triangular winglet in contact with the aerodynamic surface, the plane having the same curvature as the aerodynamic surface. Fig. 3b is a triangular winglet size diagram, wherein the values of the length a and the width b of the triangular winglet are indicated, and a and b can be selected according to specific needs, and the specific values in the diagram are an embodiment of the invention. In fig. 3b, e is the length of the rectangular opening, and f is the width of the rectangular opening, and the aspect ratio is mainly considered in the invention, and the different aspect ratios cause the difference in the results.

While preferred embodiments of the invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art and having the benefit of the teachings herein. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

Claims

1. A penetrating triangular vortex generator, the penetrating triangular vortex generator comprising:

Air inflow section (1)

Eddy current generation section (2)

The air outflow section (3), wherein the air outflow section, the vortex generation section and the air outflow section have the same inner and outer diameters and have the same coaxiality.

Opposite triangles (4).

2. The air inflow section (1) according to claim 1, the inner and outer surfaces of the vortex generating section (2) and the air outflow section (3) completely overlap to form an aerodynamic surface.

3. The piercing triangle (4) according to claim 1, which is composed of a plurality of triangular winglets with openings and a middle support. Wherein, in one embodiment of the present invention, the opening of the triangular winglet with the opening is a rectangular opening, the central support is a continuous cylinder, and the triangular winglet with the rectangular opening and the central strut form an opposing triangle.

4. The vortex generating section (2) according to claim 1, which is composed of a plurality of groups of intersecting triangles (4) connected with the vortex generating parts of the aerodynamic surface.

5. According to claim 3, in an embodiment of the present invention, a plurality of triangular winglets with rectangular openings are connected with the central strut, and each triangular winglet is connected to the center The included angle between the axes is α, and in one embodiment of the present invention, α is 30°. It is pointed out that it is only composed of a plurality of triangular winglets with openings connected, or the central strut is selected from different geometric bodies and multi-section central struts are all within the protection scope of the present invention.

6. According to claim 4, the vortex generation part of the penetrating triangle on the aerodynamic surface is connected: the open end of each triangular winglet of the penetrating triangle has a curved surface A with the same curvature as the aerodynamic inner surface, and the air flow rate is higher than that of the aerodynamic inner surface. In a small scene, the extrusion tension between the penetrating triangle and the aerodynamic surface can play a fixed role. In a scene with a large air velocity, the penetrating triangle needs to be adhered to the aerodynamic surface. The distance between each two groups of intersecting triangles is L and the rotation angle is β, and L and β are selected according to different requirements.

7. The triangular winglet with an opening according to claim 3, the size of the triangular winglet is as shown in the accompanying drawings, which is only an embodiment of the present invention. The shape of the opening and the shape of the opening have a very important influence on the eddy current. In this embodiment, a rectangular opening is selected, and the aspect ratio of the rectangle is an important parameter.

8. A cross-triangle vortex device can be made of heat-resistant plastic and metal materials according to the temperature environment used.