Modular closed low-speed direct-current wind tunnel

Abstract

The invention relates to the field of aeronautical engineering dynamics, and discloses a modular closed low-speed direct-current wind tunnel. The wind tunnel comprises a tunnel body structure and a power system, and is characterized in that the tunnel body structure comprises a tunnel body bracket, and the tunnel body bracket is sequentially provided with an air inlet section, a test section and an expansion section; the power system comprises a draught fan, a movable sliding rail and a power support; the tunnel body structure is in butt joint with the power system through the movable slidingrail; fan connecting lugs are welded to the two sides of the outer wall of the fan correspondingly and connected with the movable sliding rail through bolts; a plurality of through holes are formed inthe upper surface and the lower surface of the movable sliding rail respectively, and the movable sliding rail is connected with the power support. The whole structure has the characteristic of modularization, the performance is reliable and stable, the use and operation are very convenient and fast, the practicability and adaptability are high, the hole body structure and the power system both adopt independent movable brackets, and the weight is low; and the tunnel wall adopts a streamline design meeting aerodynamic requirements, so that the whole operation is more energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to the field of aeronautical engineering dynamics, in particular to a modular closed low-speed DC wind tunnel. Background technique [0002] The wind tunnel is a special aerodynamic test equipment in the field of aeronautical engineering. It is used to conduct aerodynamic tests of aircraft, and can be extended to aerodynamic tests of vehicles, high-speed trains, buildings, propellers and other products. [0003] Existing wind tunnels are generally divided into two categories. The first category is large-scale wind tunnels. The overall structure adopts a relatively thick steel structure, which is heavy in weight. In order to ensure safe use, it is often integrated with the building during installation, which cannot be convenient. Mobile, its power unit is also single and cannot be replaced to improve test performance; the second type is miniaturized wind tunnels, which generally use wooden structures. Although they are light in wei...

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Problems solved by technology

[0003] Existing wind tunnels are generally divided into two categories. The first category is large-scale wind tunnels. The overall structure adopts a relatively thick steel structure, which is heavy in weight. In order to ensure safe use, it is often integrated with the building during installation, which cannot be convenient. Mobile, its power unit is also single and cannot be replaced to improve test performance; the second type is miniaturized wind tunnels, which generally use wooden structures. Although they are light in weight, the test section is very small, which greatly limits their test capabilities. and test performance. In addition, due to the insufficient strength of the wooden structure, the wooden structure is prone to vibration and excessive noise during the test, which limits the increase of the test wind speed.

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