基于FDM-VBF的低雷诺数串列双圆柱绕流数值模拟  

Numerical simulation of flow around two tandem cylinders at low Reynolds number using FDM-VBF

作　　者：赵海栋 王超[1] 任冰[1] 陈卫东 王国玉[1] ZHAO Haidong;WANG Chao;REN Bing;CHEN Weidong;WANG Guoyu(State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China)

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《大连理工大学学报》2022年第3期292-298,共7页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(52031002,51979028).

摘　　要：基于有限差分法(FDM)建立了求解串列双圆柱绕流问题的二维和三维数值模型,采用虚拟边界力法(VBF)处理结构物边界.对于Re=200串列双圆柱绕流问题,分别分析了数值模型的计算域大小、网格收敛性和流场的三维效应.针对间距比L^(*)在2.0~5.0的串列双圆柱绕流问题进行了数值模拟,分析了间距比对阻力系数、升力系数及斯特劳哈尔数的影响.研究发现,当L^(*)<3.7时,上下游圆柱阻力系数、升力系数及斯特劳哈尔数均较小;当L^(*)>3.7时,上下游圆柱阻力系数、升力系数及斯特劳哈尔数均有突增.Two-dimensional and three-dimensional numerical models for solving the problem of the flow around two tandem cylinders are established by the finite difference method(FDM),and the virtual boundary force method(VBF)is used to deal with the boundary of the structure.For the problem of the flow around two tandem cylinders at Re=200,the size of the computational domain,the grid convergence and the three-dimensional effect of the flow field are analyzed respectively.The numerical simulation of the flow around two tandem cylinders with a spacing ratio(L^(*))of 2.0-5.0 is carried out,the effect of spacing ratio on drag coefficient,lift coefficient and Strouhal number is analyzed.The results show that when L^(*)<3.7,drag coefficient,lift coefficient and Strouhal number of upstream and downstream cylinders are relatively small,and when L^(*)>3.7,drag coefficient,lift coefficient and Strouhal number of upstream and downstream cylinders increase sharply.

关 键 词：串列双圆柱 有限差分法 虚拟边界力法 临界间距比 计算域 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]