Downburst wake flow section wind field simulation device

Abstract

The invention discloses a downburst wake flow section wind field simulation device. The downburst wake flow section wind field simulation device can simulate a downburst wake flow section wind field,and the simulation of the downburst relatively large geometric scale ratio wind field is realized. The downburst wake flow section wind field simulation device comprises a boundary layer wind tunnel,a wall surface jet air duct and a mixed flow fan, wherein a receding opening is formed in the bottom wall of the boundary layer wind tunnel; the wall surface jet air duct is arranged at the receding opening, and the wall surface jet air duct is C-shaped; the mixed flow fan is mounted in the air inlet in the side end of the lower part of the wall surface jet air duct; the air outlet in the upper part side end of the wall surface jet air duct is located in the boundary layer wind tunnel, and the direction of the air outlet is the same as the air outlet direction of the boundary layer wind tunnel; and the device is used for simulating the wind field of the downburst wake flow section.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to a wind field simulation device in the wake section of a downburst. Background technique [0002] A downburst is a short-term destructive strong wind near the surface formed by a strong downdraft violently hitting the ground in thunderstorm weather and propagating through the surface. The collapse of more than 80% of existing weather-related transmission tower structures is caused by strong winds such as downbursts in thunderstorm weather. In order to prevent the damage to structures caused by downbursts, wind tunnel tests are needed to study the wind load characteristics of structure models in downburst wind fields. [0003] At present, the downburst wind field simulation device uses a fan installed at a certain height to generate an impingement jet vertical to the ground, which requires a certain ratio between the fan nozzle section and the vertical height...

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Problems solved by technology

[0003] At present, the downburst wind field simulation device uses a fan installed at a certain height to generate an impingement jet vertical to the ground, which requires a certain ratio between the fan nozzle section and the vertical height, so a large-scale wind tunnel test requires a larger fan nozzle section And the higher height of the wind tunnel laboratory; at the same time, the actual downburst is often accompanied by translational motion, and it is very difficult to quickly move a fixed and mid-air fan

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