Influences of different four-tower combination forms on super-large cooling towers&rsquo; local wind pressure interference effect

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (9) : 106-113.

Influences of different four-tower combination forms on super-large cooling towers’ local wind pressure interference effect

WANG Hao , KE Shitang

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Abstract

Excessive large local wind pressure is one of important factors causing a cooling tower’s local damage and destruction, and the interference effect of tower groups can significantly change cooling tower’s local wind pressure distribution pattern. Taking the world’s highest cooling tower (220m) now being built as the engineering background, the wind tunnel tests for a single tower, two towers and five typical four-tower combinations were conducted. The distribution features of four-tower combinations’ wind pressure interference factor were discussed. Influence laws of four-tower combinations on distribution modes of cooling towers’ mean wind pressure and fluctuating one were analyzed. Wind pressure signals were decomposed and analyzed in time-frequency domain based on the mathematical statistics and Hilbert-Huang transformation (HHT). The results showed that the interference effect of four-tower combinations on the middle tower is the maximum; the influence of four-tower combination effect on mean wind pressure mainly focuses on the minimum negative pressure area and leeward zone; in 5 typical four-tower combinations, the diamond scheme has the smallest static interference on local wind pressure, and the oblique L-shaped scheme has the smallest dynamic interference on local wind pressure.

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/ four-tower combination, super-large cooling tower, wind tunnel test, interference factor, local wind pressure, non-Gaussian features

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WANG Hao,KE Shitang. Influences of different four-tower combination forms on super-large cooling towers’ local wind pressure interference effect[J]. Journal of Vibration and Shock, 2018, 37(9): 106-113

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