周边密集建筑对超大型冷却塔风荷载的干扰效应研究  

Research on the Wind Load Interference Effect of Surrounding Dense Buildings on Super-large Cooling Towers

作　　者：顾晓庆 束加庆 曾赛男 柯世堂[2] 卢红前 Gu Xiaoqing;Shu Jiaqing;Zeng Sainan;Ke Shitang;Lu Hongqian(China Energy Engineering Group Jiangsu Power Design Institute Co.,Ltd.,Nanjing 211102,China;Department of Civil and Airport Engineering,Nanjing University of Aeronautics and Astronautics,211106,China)

机构地区：[1]中国能源建设集团江苏省电力设计院有限公司,南京211102 [2]南京航空航天大学土木与机场工程系,211106

出　　处：《特种结构》2025年第2期1-6,15,共7页Special Structures

基　　金：国家自然科学基金(52078251);江苏省自然科学基金(BK20211518,BK20210309)。

摘　　要：电厂周边密集建筑会加剧冷却塔塔群的风致干扰效应,而我国规范(DL/T 5339—2006、GB/T 50102—2014)与德国规范(VGB-R 610 Ue:2005)以及现有研究大多只关注塔群间的干扰效应,忽略了周边密集建筑对冷却塔风荷载的干扰效应。以国内某在建188m高超大型冷却塔群为对象,采用刚体同步测压风洞试验研究周边密集建筑干扰下超大型冷却塔平均和脉动风压分布特性,对比分析了以整体阻力系数为准则的超大型冷却塔的干扰系数,并采用CFD数值模拟针对最不利风向角进行了风致干扰机理研究。研究表明:周边密集干扰建筑对超大型冷却塔塔群平均风压的影响要远大于脉动风压,同时显著放大了超大型冷却塔整体风荷载,并减小了局部区域的测点风压,总体表现为受扰塔来流方向侧前方距离较近的干扰建筑与冷却塔形成的“夹道效应”加剧了干扰效应.The dense buildings surrounding a power plant can significantly amplify the wind-induced inter-ference effects on a cooling tower group.However,existing standards inChina(DL/T 5339-2006,GB/T 50102-2014)and Germany(VGB-R 610 Ue:2005),as well as previous research,mainly focus on the interference effects between towers,often overlooking the impact of surrounding dense buildings on the wind load of cooling towers.Taking a 188m-high super-large cooling tower group under construction in China as the research object,the average and fluctuating wind pressure distribution characteristics of this super-large cooling tower group under interference from surrounding dense buildings are studied using rigid body synchronous pressure measurement wind tunnel experiments in this paper.This study compares and analyzes the interference coefficients of the super-large cooling tower group based on the overall drag coefficient,and uses CFD numerical simulations to investigate the wind-induced interference mechanism at the most unfavorable wind direction angle.The results indicate that surrounding dense buildings have a far greater impact on the average wind pressure of the super-large cooling tower group than on fluctuating wind pressure.They also significantly amplify the overall wind load on the cooling towers while reducing wind pressure at certain local measurement points.Overall,the interference effect is intensified by the"channeling effect"created between the cooling tower and nearby interfering buildings positioned in front of the disturbed tower along the incoming wind direction.

关 键 词：超大型冷却塔 周边密集建筑 风洞试验 风荷载 干扰效应 

分 类 号：TU279.7[建筑科学—建筑设计及理论]