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; Wuhan University of Science and Technology WHUST
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-07-09
Also published as: CN113639578A

Abstract

The invention relates to a bisection triangular vortex generator, which mainly comprises the following components in an embodiment: aerodynamic surfaces, opposing triangular winglets. The aerodynamic surface thereof is mainly divided into: the air inflow section, the vortex takes place the section and air outflow section, and the vortex takes place the section and mainly to wearing triangle-shaped and aerodynamic surface interact formation wherein. The size of the triangular winglets and the shape and size of the openings of the triangular winglets, the distribution distance and the rotation angle of the aerodynamic surfaces can enable the vortex structure caused by the vortex generator and the temperature distribution in the vortex structure. The present invention will be described mainly in one embodiment.

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 through-triangle vortex generator, comprising:

air inflow section (1)

Vortex generation section (2)

Air outflow section (3), wherein the air outflow section, the section is taken place to the vortex and the interior external diameter of air outflow section is unanimous and the three has the same axiality.

The triangle (4) is penetrated.

2. The air inflow section (1) according to claim 1, the vortex generation section (2) and the air outflow section (3) having their inner and outer surfaces completely coincident to form an aerodynamic surface.

3. The bisecting triangle (4) as claimed in claim 1, comprising a plurality of triangular winglets with openings and a central support. In one embodiment of the present invention, the triangular winglet has a rectangular opening, the central support is a continuous cylinder, and the triangular winglet has a rectangular opening and the central support rod form a through triangle.

4. The vortex generation section (2) according to claim 1, consisting of a plurality of sets of connected vortex generation sections intersecting the triangle (4) and the aerodynamic surface.

5. In an embodiment of the invention according to claim 3, the right-angle triangle (4): a plurality of triangular winglets with rectangular openings are connected together with a central strut, each triangular winglet making an angle α with the central axis, which in one embodiment of the invention is 30 °. It is within the scope of the invention to point out that only a single connection of a plurality of triangular winglets with openings or a different geometry and a multi-segmented central strut for the central strut is contemplated.

6. According to claim 4, the connection of the triangularly shaped vortex generating section at the aerodynamic surface is: the open end of each triangular winglet of the opposite-crossing triangle is provided with a curved surface A with the same curvature as the aerodynamic inner surface, the extrusion tension of the opposite-crossing triangle and the aerodynamic surface can play a role in fixing in a scene with low air flow rate, and the opposite-crossing triangle needs to be adhered to the aerodynamic surface in a scene with high air flow rate. The distance between every two groups of opposite-crossing triangles is L, the rotating angle is beta, and the L and the beta are selected according to different requirements.

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

8. A through triangular swirler can be made of heat-resistant plastic and metal materials according to the temperature environment in which the through triangular swirler is used.