高雷诺数下圆柱绕流与大振幅比受迫振动的数值模拟  

Numerical simulation of viscous flow around circular cylinder at high Reynolds numbers and forced oscillating at large ratio of amplitude

作　　者：樊娟娟[1,2] 唐友刚[1,2] 张若瑜[1,2] 邵卫东[1,2] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]水利工程安全与仿真国家重点实验室,天津300072

出　　处：《水动力学研究与进展（A辑）》2012年第1期24-32,共9页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金项目(51079097)~~

摘　　要：利用CFD方法,研究较高雷诺数下圆柱绕流及圆柱大振幅比横向受迫振动特性。在Navier-Stokes方程和k??湍流模型的基础上,对圆柱绕流分别进行了二维与三维的数值模拟,得到了圆柱绕流的升力系数和漩涡发放频率数等结果。研究结果表明,三维模拟的升力系数均小于二维模拟结果。利用Fluent的动网格技术进行大振幅比圆柱横向受迫振动的研究,得到圆柱在不同振动频率时的升力系数及漩涡发放规律和圆柱在特定振幅及频率下的"锁定"区间。With CFD method,the characteristics of viscous flow around circular cylinder at high Reynolds numbers and Forced Oscillating of large amplitude ratio are studied.Based on the Navier-Stokes equation and turbulent model,the 2D and 3D of Viscous Flow around circular are simulated.The lift coefficient and vortex shedding frequency are obtained. Comparing between the results based on the 2D analysis and the 3D analysis,the 3D results are smaller than the 2D results.With the dynamic mesh of Fluent,the simulation s of Forced Oscillating Cylinder at high amplitude ratio is presented.The variation of lift coefficient and vortex shedding frequency are obtained,the ＂lock-in＂ region is given.

关 键 词：CFD 圆柱绕流 漩涡发放 受迫振动 “锁定”区间 

分 类 号：TV131[水利工程—水力学及河流动力学]