(1 石家庄铁道大学大型结构健康诊断与控制研究所， 石家庄 050043；2 河北省大型结构健康诊断与控制重点实验室， 石家庄 050043；3 石家庄铁道大学土木工程学院， 石家庄 050043）

［摘要］既有串列双方柱的绕流研究着重分析双方柱的流态、整体阻力和升力等参数，对双方柱表面的局部压力分布关注较少。通过刚性模型测压风洞试验研究了串列双方柱绕流的时均压力分布特性。结果表明，下游方柱对上游方柱时均压力的影响主要表现在小于临界间距时的侧面和背风面。上游方柱对下游方柱时均压力的影响非常显著，这种影响尤其体现在下游方柱的迎风面。定义干扰因子为上游（或下游）方柱不同分区的时均压力系数与单方柱对应分区时均压力系数的比值，讨论了串列双方柱各分区的时均压力系数干扰因子随间距的变化规律。

［关键词］串列双方柱； 时均压力分布； 干扰因子； 风洞试验

中图分类号：TU311-3文献标识码：A文章编号：1002-848X(2020)01-0135-05

Study on time averaged pressure distribution features of flow around two square cylinders in tandem arrangement

Liu Xiaobing1,2， Chen Shuai3， Zhao Huitao3

(1 Structural Health Monitoring and Control Institute, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;2 Hebei Province Key Lab of Structural Health Monitoring and Control, Shijiazhuang 050043, China;3 School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China)

Abstract:In the study of the flow around the existing two square cylinders in tandem arrangement, the parameters of flow pattern, the overall resistance and the lift force of the two square columns were mainly analyzed, and the local pressure distribution on the surface of the two square columns was less concerned. The time averaged pressure distribution of the flow around two square columns in tandem arrangement was studied by the wind tunnel test of the rigid model. The results show that the influence of the downstream square column on the time averaged pressure of the upstream square column mainly lies in the side and leeward side when the distance is less than the critical distance. The influence of the upstream square column on the time averaged pressure of the downstream square column is very significant, especially in the windward side of the downstream square column. The interference factor was defined as the ratio of the time average pressure coefficient of the different zones of the upstream (or downstream) square column to the time averaged pressure coefficient of the corresponding zone of the single square column. The variation of time averaged pressure coefficient interference factor with the distance between columns was discussed.

Keywords:two square cylinders in tandem arrangement; time averaged pressure distribution; interference factor; wind tunnel test

*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重点项目（ZD2019118），河北省大型基础设施防灾减灾协同创新中心资助项目。

作者简介：刘小兵，博士，副教授，Email: x_b_liu@126.com。