Suction gust wind tunnel with porous turning device

Abstract

The invention discloses a suction gust wind tunnel with a porous turning device. The suction gust wind tunnel comprises a settling chamber, a contraction section, a test section, a diffuser section, apower section and an exit diffuser section which are connected in sequence. The technical points include the porous turning device is arranged for controlling air flux to change air flow rate entering the test section from the power section so as to form gust; rate of variation of gust in the test section is changed by controlling turning rate of a porous turning plate. The gust wind tunnel can generate gust in high or low frequency.

Description

technical field [0001] The invention relates to a gust wind tunnel experimental device in the technical field of wind engineering, in particular to a suction gust wind tunnel with a multi-hole rotating device. Background technique [0002] Simply put, a wind tunnel is a specially designed long pipe, which generates an airflow that can be controlled freely by the power system (motor and fan) inside it, and uses it to simulate the flow of air when objects move in the air Phenomena, the situation of objects under force, the phenomenon of air flow around certain fixed objects, and the migration and diffusion of smoke in the air, etc. ". [0003] Air pollution, also known as air pollution, according to the definition of the International Organization for Standardization (ISO), air pollution usually refers to certain substances entering the atmosphere due to human activities or natural processes, presenting sufficient concentrations, reaching sufficient time, and Phenomena that a...

AI Technical Summary

Problems solved by technology

The main reason why the DC blowing type is not suitable is that its power section is located upstream of the test section. When the fan rotates at low speed, the gap between the multi-blades is large, which will produce a burst effect of fixed frequency. At the same time, when the wind diffuses downward through the power section, it will produce Turbulence in multiple directions leads to unstable wind environment

Due to the closed backflow characteristics of the backflow wind tunnel, the pollution sources cannot be discharged outside the experimental environment after the pollutants are released, which makes the background pollution concentration in the test section continuously superimpose and increase, hindering the measurement of the experiment.

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