摘要
为了研究并列双方柱在不同间距比时气动力特性的干扰效应,采用刚性模型测压风洞试验的方法,通过改变两方柱之间的距离,得到了不同间距比下并列双方柱的风压系数、升力系数和阻力系数。结果表明:当间距比1.2≤L/D<2.5时,并列双方柱平均风压系数的干扰效应明显,且主要表现在内侧面,平均阻力系数和脉动升力系数的干扰效应表现为减小效应;当间距比L/D≥2.5时,并列双方柱的平均风压系数、平均阻力系数和脉动升力系数的干扰效应均不明显。
To study the interference effect on the aerodynamic characteristics of two side-by-side square cylinders at different spacing ratios,the wind pressure from a wind tunnel test on a rigid model was adopted.By changing the distance between two side-by-side square cylinders,the pressure coefficients and the lift and drag coefficients of two side-by-side square cylinders with different spacing ratios were obtained.The results show that when 1.2≤L/D<2.5,the interference effect on the time-average wind pressure coefficient of the two side-by-side square cylinders is obvious,and is mainly manifested on the inner side.The interference effect on the timeaveraged drag coefficient and the fluctuating lift coefficient is a reduction effect.When L/D≥2.5,the interference effects on the time-average wind pressure coefficient,the time-average drag coefficient and the fluctuating lift coefficient of the two side-by-side square cylinders are not obvious.
作者
吴倩云
孙亚松
刘小兵
WU Qian-yun;SUN Ya-song;LIU Xiao-bing(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Wind Engineering Research Center,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province,Shijiazhuang 050043,China)
出处
《工程力学》
EI
CSCD
北大核心
2020年第S01期265-269,共5页
Engineering Mechanics
基金
河北省自然科学基金项目(E2018210105)
河北省高等学校科学技术研究项目(ZD2019118)
河北省大型基础设施防灾减灾协同创新中心资助项目。
关键词
并列双方柱
干扰效应
风洞试验
风压分布
升阻力系数
two side-by-side square cylinders
interference effect
wind tunnel test
wind pressure distribution
lift and drag coefficient
