串列双方柱气动干扰效应试验研究  

Experimental study on aerodynamic interference effect of two square cylinders in a tandem arrangement

作　　者：杜晓庆[1,2] 许汉林 马文勇 代钦[2,4] DU Xiaoqing;XU Hanlin;MA Wenyong;DAI Chin(Department of Civil Engineering,Shanghai University,Shanghai 200444,China;Wind Engineering and Aerodynamic Flow Control Research Center,Shanghai University,Shanghai 200444,China;Wind Engineering Research Center,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Institute of Applied Mathematics and Mechanics,Shanghai University,Shanghai 200072,China)

机构地区：[1]上海大学土木工程系,上海200444 [2]上海大学风工程和气动控制研究中心,上海200444 [3]石家庄铁道大学风工程研究中心,河北石家庄,050043 [4]上海大学上海市应用数学和力学研究所,上海200072

出　　处：《建筑结构学报》2019年第11期27-34,共8页Journal of Building Structures

基　　金：国家自然科学基金项目(51578330);上海市自然科学基金项目(14ZR1416000);河北省自然科学基金项目(E2017210107)

摘　　要：为了进一步澄清串列方柱的气动干扰效应,以串列双方柱为研究对象,在雷诺数Re=8.0×10^4、间距比P/B为1.25~5(其中P为方柱中心间距、B为方柱边长)条件下,通过风洞试验同步测得上下游方柱沿周向和展向的表面风压,研究了上下游方柱的风压和气动力特性、两方柱之间气动力的柱间相关性、各方柱气动力沿展向的柱内相关性等随方柱间距的变化情况,分析并给出了干扰条件下非高斯风压沿方柱周向的分布区域。研究结果表明:串列双方柱的临界间距比P/B处在3和3.5之间,在临界间距前后,两个方柱的气动性能均会发生突变;气动力的柱间相关性和柱内相关性随方柱间距变化剧烈,间距比P/B=1.25的串列方柱的气动力柱内相关性远强于单方柱;串列双方柱的风压非高斯区域随间距比的变化较大,下游方柱表面风压的非高斯特性较单方柱更为显著。To clarify aerodynamic interference between two square cylinders in tandem arrangement,the surface wind pressures of the two cylinders were measured simultaneously by wind tunnel tests at Reynolds number Re=8.0×10^4 and P/B=1.25-5,where P is the center-to-center spacing of the two cylinders and B is the breadth of the square cylinder.Aerodynamic characteristics of the two square cylinders with varying spacing ratio were investigated.The aerodynamic correlations between the two cylinders(inter-cylinder)and different spanwise sections of cylinders(intracylinder)were studied as well.The distribution regions of non-Gaussian wind pressure along the circumferential direction were presented.Results show that the critical spacing ratio of the tandem square cylinders is between 3 and3.5,which produces a discontinuous jump of aerodynamic forces.The aerodynamic correlations change dramatically with the variation of spacing ratio.Specifically,intra-cylinder aerodynamic correlations of the two tandem square cylinders with P/B=1.25 are much greater than those of the single square cylinder.Furthermore,the wind pressure non-Gaussian regions of the two tandem cylinders are presented,which change significantly with the spacing ratio and show different distribution patterns compared with the single square cylinder.

关 键 词：串列双方柱 干扰效应 风洞试验 气动力相关性 非高斯特性 

分 类 号：TU973[建筑科学—结构工程] TU312.1