串列双方柱绕流的数值模拟  

Numerical Simulation of Flow around Two Square Cylinders in Tandem Arrangement

作　　者：吕启兵[1] 杨斌[1] 杨忠超[1] 李鹏浩 

机构地区：[1]重庆交通大学河海学院,重庆400074 [2]温州港集团有限公司,浙江温州325100

出　　处：《重庆交通大学学报（自然科学版）》2013年第5期1010-1013,共4页Journal of Chongqing Jiaotong University(Natural Science)

基　　金："十二五"国家科技支撑计划项目(2012BAB05B00)

摘　　要：采用有限体积法,利用RNG k-ε模型对雷诺数Re=22 000情况下二维串列双方柱绕流进行湍流数值模拟。着重研究了不同的方柱间距比时上下游方柱所受到的阻力、升力与涡街特性,以及各方柱后尾流的变化情况。计算结果表明:上游方柱受力明显大于下游方柱,但两方柱脉动频率几乎相等,而升力有较大差别;下游方柱所受阻力沿水流方向随着间距的增加而增大;受上游方柱尾流作用,下游方柱升力增加,脉动较单柱情形时明显变大;分析了不同间距下流场的演变情况。Based on the finite volume method and the RNG k-ε model,in the case of Re = 22,000,two dimensional square cylinders of turbulent are simulated.The drag,the lift and the swirl characteristics of the square column in upstream and downstream with different square cylinders spacing ratio,and the change of the wake after the square cylinders are focused in the study.Calculation results show that:the upstream square cylinders stress is obviously greater than the downstream one,but the pulsation frequencies of two square cylinders are almost equal; the lift of square cylinders has big difference.The drag of the downstream square cylinder increases with the increase of distance along the flow.With the wake effect of the upstream cylinder,the lift of downstream square cylinder increases,and pulsation is obviously larger than that of a single-column situation.Finally,the evolution of flow field with different spacing is analyzed.

关 键 词：RNG k-ε模型 方柱绕流 阻力 升力 数值模拟 

分 类 号：O357.5[理学—流体力学]