超大型冷却塔龙卷风作用塔筒內表面风荷载特性研究

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摘要以某规划建设的215 m超大型冷却塔为研究对象，基于龙卷风物理模拟装置开展了龙卷风作用下冷却塔刚体测压风洞试验，研究了不同龙卷风涡流比条件下塔筒内表面风压分布规律，提出了龙卷风作用塔筒内压分布数学模型。结果表明：龙卷风作用下的塔筒内压主要受龙卷气压降影响，呈均匀分布、环向强相关的负压；内压随龙卷风涡核半径内涡流比的减小以及塔心至涡心间距的减小而减小，即冷却塔位于低涡流比下的龙卷风涡核中心时所受内吸力最大，内压分布可以定量表示为冷却塔与龙卷风相对位置有关的对数模型。

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	陈旭1
	黄珑霆1
	丁福祥1
	韩力1
	王通1
	赵林2

关键词 ：超大型冷却塔, 龙卷风, 内压, 风洞实验, 涡流比

Abstract：The wind tunnel tests of pressure measurements for a rigid model of 215 m high super-large cooling tower planned for construction under tornadoes were conducted based on the tornado-vortex simulator. The distributions of internal pressures acting on the tower drum under different swirl ratios were investigated. The mathematical model of internal pressure distributions under tornadoes was proposed as well. The results show that the internal pressures under tornadoes are dominated by the pressure drop accompanying a tornado, displaying the negative pressures with uniform distributions and high correlations in the circumferential direction. The internal pressures decrease with decrease of the swirl ratio as the tower is located inside the tornado core radius and the decreased distance between cooling tower center and tornado center, meaning that the tower experiences the maximum suction in the situation where the tower is located at the tornado core center with the lower swirl ratio. Furthermore, the internal pressure distribution can be quantitatively expressed as a logarithmic model with respect to the relative position between cooling tower and tornado.

Key words： super large cooling tower tornado internal pressure wind tunnel test swirl ratio

收稿日期: 2021-04-21 出版日期: 2021-11-15

引用本文:

陈旭1，黄珑霆1，丁福祥1，韩力1，王通1，赵林2. 超大型冷却塔龙卷风作用塔筒內表面风荷载特性研究[J]. 振动与冲击, 2021, 40(21): 31-38.
CHEN Xu1, HUANG Longting1, DING Fuxiang1, HAN Li1, WANG Tong1, ZHAO Lin2. Characteristics of wind load on inner surface of super large cooling tower under tornado action. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(21): 31-38.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2021/V40/I21/31

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