Coreless low-speed wind tunnel device

Abstract

The invention discloses a coreless low-speed wind tunnel device, relates to the technical field of wind tunnel equipment, and mainly aims to provide the coreless low-speed wind tunnel device which forms negative pressure as a power source in a positive pressure air supply mode so as to reduce noise and vibration. According to the main technical scheme, the coreless low-speed wind tunnel device comprises a wind tunnel component, the wind tunnel component comprises a contraction section, a test section and a diffusion section, and the test section is arranged between the contraction section and the diffusion section; the power component comprises a power shell, a plurality of connecting pipelines and a plurality of fan components, the power shell comprises a first air outlet pipeline and a connecting ring, one end of the first air outlet pipeline is connected to the connecting ring, the connecting ring is provided with a second air outlet pipeline and a plurality of air inlet pipelines, and the diffusion section is connected to the second air outlet pipeline; one end of the connecting pipeline is connected to the air inlet pipeline, and the other end is connected to the fan component. The device is mainly used for aerodynamics research.

Description

technical field [0001] The invention relates to the technical field of wind tunnel equipment, in particular to a coreless low-speed wind tunnel device. Background technique [0002] A wind tunnel refers to a device that uses a power device to drive a controllable airflow in a pipeline system designed according to certain requirements, and conducts various aerodynamic tests according to the principle of relativity and similarity of motion. It is widely used in agricultural production, coal mining. , meteorological monitoring, ecological protection and measurement and other fields. [0003] There are many types of wind tunnels. According to the gas flow characteristics, there are mainly direct-current type and reflux type. According to Mach number: Ma≤0.4 is a low-speed wind tunnel, Ma=0.4~1.4 is a transonic wind tunnel, Ma=1.5~4.5 It is a supersonic wind tunnel and a hypersonic wind tunnel with Ma ≥ 5. The low-speed DC wind tunnel is mainly composed of five parts: a stable s...

AI Technical Summary

Problems solved by technology

[0004] First, the axial flow fan adopts high-power equipment, and a fairing needs to be designed at the front and rear of the fan, which increases the airflow resistance area, resulting in greater noise pollution;

[0005] Second, the high-speed rotating axial flow fan will produce irresistible vibration, and at the same time have a certain impact on the airflow deflection angle and turbulence degree of the flow field in the test section;

[0006] Third, the airflow speed adjustment is single and can only be adjusted by changing the frequency

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