Wind-induced interference effect of a super large cooling 4-tower group under complex mountain environment

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (24) : 116-123.

YU Wenlin KE Shitang

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Abstract

In order to systematically study the wind-induced interference effect of complex mountain environment and surrounding buildings on a super large cooling 4-tower group with the height over the 190m limit of the national standard, a group of four 210m high large cooling towers under domestic construction was taken as a study object. The flow field around the cooling towers group near a complex mountain (the height close to the cooling tower throat elevation and the distance close to the tower body) under different angles of wind flow was simulated based on the computational fluid dynamics (CFD) method. The wind pressure distribution of single cooling tower was compared with those of the national standard and the tested curves to verify the effectiveness of the numerical simulation. Furthermore, maximum negative pressures, interference factors and average wind pressure distribution characteristics of cooling tower surfaces were contrastively analyzed considering interferences of complex mountain and surrounding buildings. Then the wind-induced interference mechanism between mountain and towers was deduced based on the analysis of velocity and vorticity changes around cooling towers under the most unfavorable conditions. The results showed that complex mountain has a significant influence on flow turbulence and wind pressure distribution patterns of the cooling towers group; influenced by the "way effect" between cooling towers and buildings, the interference factor under the worst condition is up to 1.43, it is significantly greater than the common interference factor without complex landform; main conclusions can provide a reference for choosing the interference factor of such a super large cooling towers group considering complex mountain environment.

Key words

complex mountain environment / four towers group / super large cooling tower / wind load / interference effect

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YU Wenlin KE Shitang . Wind-induced interference effect of a super large cooling 4-tower group under complex mountain environment[J]. Journal of Vibration and Shock, 2017, 36(24): 116-123

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