中等间距比条件下串列双圆柱流致振动数值模拟  

Numerical Simulation of Flow-induced Vibration of Two-cylinder in Tandem with a Medium Spacing Ratio

作　　者：韩冰[1] 及春宁[1] 刘爽[2] 陈威霖[1] 

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072 [2]中交第一航务工程勘察设计院有限公司,天津300222

出　　处：《港工技术》2016年第6期1-6,共6页Port Engineering Technology

基　　金：国家自然科学基金资助项目(51579175;51209161;51479135)

摘　　要：在上下游圆柱最大振幅较单圆柱的都有较大提升,下游圆柱所受的阻力均值小于上游圆柱的阻力均值,而下游圆柱的升力均方根值在折合流速较小时(U_r<6.1)比上游圆柱的小,在折合流速较大时(U_r>6.1)比上游圆柱的大。发现了两种尾流模式,分别为单阻流体模式(SG模式)和剪切层重附着模式(AG模式)。The maximum vibration amplitudes of cylinders at upstream and downstream are raised to a larger extent in comparison with single cylinder. The mean resistance against the downstream cylinder is smaller than that of the upstream cylinder, while the root-mean-square （r.m.s） of lift force against the downstream cylinder is smaller than that of the upstream cylinder in case of Ur 〈6.1 but larger in case of Ur 〉6.1. In addition, two wake-stream patterns are summarized, i.e. single resistance fluid pattern （SG） and shear-layer attached pattern （AG）.

关 键 词：串列双圆柱 流致振动 响应分支 尾流模式 浸入边界法 

分 类 号：P751[交通运输工程—港口、海岸及近海工程] TB532[天文地球—海洋科学]