不同导风装置对超大型冷却塔风压特性影响研究

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (22) : 136-141.

论文

柯世堂朱鹏

作者信息 +

Impact study of the different air-deflectors on the wind pressure for super-large cooling towers

Shitang Ke, Peng Zhu

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文章历史 +

摘要

为研究不同导风装置对超大型冷却塔风压分布特性的影响，通过风洞试验对比研究了三种有导风装置和无导风装置的大型冷却塔表面风压分布特性，其中包括平均风压、脉动风压、峰值因子、以及极值风压等气动参数，提炼出不同导风装置对大型冷却塔整体和局部风压分布的影响规律，最后给出了不同导风装置下冷却塔极值风压的拟合公式。结果表明：三种导风装置均能有效减少塔筒中部负压极值区域的平均风压，同时也能有效减少塔筒迎风面中上部脉动风压的根方差，尤其以弧形导风板效果最好；不同导风装置均可有效减小塔筒中下部迎风面和负压极值区域的风压极值，尤其以弧形导风板效果最好；考虑不同导风装置下大型冷却塔迎风面、侧风面和背风面峰值因子取值分别为3.29、3.41和3.50。

Abstract

In order to study the wind load influence of different air-deflectors on a super-large cooling tower, the wind pressure distribution characteristics of the cooling tower with four cases are studied by wind tunnel test, the characteristics of the wind pressure include the average pressure, the fluctuating wind pressure, the extreme wind pressure and the peak factor, the influence of different air-deflectors on the overall and the local wind pressure distribution of the large cooling tower is obtained, the fitting formula of extreme wind pressure of cooling tower under different wind installations is presented. The result shows that three kinds of air-deflectors can effectively reduce the average wind pressure of the extreme pressure in the middle of cooling tower, the case four is best to reduce the RMS of the wind pressure in the upper part of the cooling tower. The peak factor values of the super-large cooling tower ring are different, the wind face is 3.29, the crosswind side is 3.41, the leeward side is 3.50.

导出引用

柯世堂朱鹏. 不同导风装置对超大型冷却塔风压特性影响研究[J]. 振动与冲击, 2016, 35(22): 136-141

Shitang Ke, Peng Zhu. Impact study of the different air-deflectors on the wind pressure for super-large cooling towers[J]. Journal of Vibration and Shock, 2016, 35(22): 136-141

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