Novel multi-fan array tornado wind tunnel and wind field simulation method

Abstract

The invention relates to a novel multi-fan array tornado wind tunnel comprising a wind tower, a multi-fan array, a rotating device and a flange, wherein a top single fan is installed at the top centerof the wind tower, and a bottom single fan is installed at the bottom of the wind tower in a circumferential direction. The top single fan and the bottom single fan are connected to the wind tower wall through the rotating device, and all the single fans can realize blowing and suction functions to make the tornado wind column twist and deform, thereby simulating the natural twisted and deformedtornado wind field. The top single fan simultaneously moves linearly through a slider and a linear guide to realize the horizontal movement of the tornado wind field. The incident angle of the airflowin the inflow region is adjusted through the rotation of the bottom single fan to obtain tornado wind fields with different eddy current ratios. The novel multi-fan array tornado wind tunnel providedby the invention can simulate tornado wind fields which can be twisted and deformed, can horizontally move and have a variable vortex ratio of the tornado wind columns.

Description

technical field [0001] The invention relates to the technical field of fluid mechanics, in particular to a multi-fan array tornado wind tunnel. Background technique [0002] A tornado is a high-speed rotating moving storm produced by severe air convection, which has the characteristics of short duration, strong wind, strong destructive power and unpredictable. At present, most of the physical simulation devices for the tornado laboratory are built based on the principle of the Ward type simulation system. Although the Ward-type simulation system can simulate a variety of vortex wind fields similar to tornadoes, it is difficult to adjust the vortex ratio of tornadoes. With the development of science and technology, A. Nishi of Miyazaki University in Japan has developed a multi-fan array wind tunnel, which can mainly simulate normal wind and fluctuating wind field. The multi-fan array wind tunnel of the IBHS Research Center in the United States is mainly used for the simulat...

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Problems solved by technology

The Tornado Wind Tunnel (WindEEE Dome) of the University of Western Ontario in Canada has 106 fans and adopts a regular hexagonal design, which can simulate the tornado and downburst wind field, but the wind tunnel cannot simulate the tornado column distortion and vortex ratio. variable tornado wind field

The above-mentioned multi-fan array wind tunnel simulation function is relatively simple, and the application field is limited

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