Wind tunnel test device for simulating thunderstorm downbursts

Abstract

The present invention discloses a wind tunnel test device for simulating thunderstorm downbursts. The wind tunnel test device comprises four vertical brackets, two oppositely-arranged vertical flow guiding plates and one or more tilt flow guiding plates; the vertical brackets are fixed in a wind tunnel test section through bolts at the upper ends and lower ends of the vertical brackets; a plurality of bolt limiting holes are evenly formed in each vertical bracket along the height direction of the vertical bracket; two sides of each vertical flow guiding plate are fixed into the bolt limiting holes of the corresponding vertical brackets; the tilt flow guiding plates are located between the two vertical flow guiding plates; the front ends and back ends of the left side edge and right side edge of each tilt flow guiding plate are provided with two sets of guide rails; each set of guide rails is slidingly connected with sliders; the sliders are fixed into the bolt limiting holes of the corresponding vertical brackets; and the tilt angles of the tilt flow guiding plates can be adjusted through moving the sliders upwards and downwards. The wind tunnel test device of the invention has the advantages of simple structure and flexible use. According to the wind tunnel test device, the profiles of the thunderstorm downbursts can be simulated in a conventional boundary layer wind tunnel without special construction of a thunderstorm downburst laboratory required, and therefore, a lot of financial resources and manpower can be saved, and the research area of the conventional boundary layer wind tunnel can be greatly expanded.

Description

technical field [0001] The invention relates to the technical field of wind engineering, in particular to a test device for simulating a thunderstorm impact wind field in a conventional boundary layer wind tunnel laboratory. Background technique [0002] Thunderstorm impact wind is a kind of disastrous strong wind caused by the extremely fast sinking airflow in thunderstorm weather near the ground or near the ground, which is extremely destructive to engineering structures. In recent years, damage accidents to high-rise buildings, high-rise structures and long-span sports venues caused by thunderstorm impact winds have occurred frequently, causing very serious economic loss accidents. For this reason, how to scientifically, accurately and reasonably determine the wind loads on structures subjected to thunderstorm impact winds is an urgent problem to be solved at present. [0003] At present, there are mainly three methods for evaluating the wind load of structures: wind tun...

AI Technical Summary

Problems solved by technology

However, due to the lack of suitable thunderstorm blast wind field simulation methods and simulation devices, it is very difficult to conduct extremely harmful thunderstorm blast wind tests in conventional boundary layer wind tunnels.

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