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圆柱非定常绕流及涡致振动的数值计算
引用本文:曹丰产,项海帆.圆柱非定常绕流及涡致振动的数值计算[J].水动力学研究与进展(A辑),2001,16(1):111-118.
作者姓名:曹丰产  项海帆
作者单位:同济大学桥梁工程系,
摘    要:用基于一般曲线坐标系和交错网格的差分法求解原始变量二维不可压粘性流体的N-S方程,计算了雷诺数从100到1×10

关 键 词:圆柱  涡致振动  动网格法  交错网格  非定常绕流  数值计算
文章编号:1000-4874(2001)01-0111-08
修稿时间:1998年5月25日

Calculation of unsteady flow around circular cylinder and vortex-induced vibration
CAO Feng-chan,XIANG Hai-fan.Calculation of unsteady flow around circular cylinder and vortex-induced vibration[J].Journal of Hydrodynamics,2001,16(1):111-118.
Authors:CAO Feng-chan  XIANG Hai-fan
Abstract:Numerical analysis of the unsteady flow around the stationary circular cylinder with Re (the Reynolds number) ranging from 100 to 10\+5 and its vortex-induced vibration with Re from 5160 to 6300 are conducted by solving the incompressible Navier-Stokes equations of initial variables in general curvilinear coordinates and staggered mesh. The vibration of the cylinder is studied by the moving-mesh method. A second-order projection method and the multigrid technique are used for solving the N-S equations. The response of cylinder is evaluated by the Newmark-β method. The vibration of the cylinder and the fluid flow are coupled by the boundary conditions on the surface of cylinder. The computed vortex shedding frequency agrees well with the experiment, and the obtained drag coefficient is satisfactory. The ‘beat’ and ‘lock-in’phenomena are successfully predicted. The computed amplitudes of vibration surprisingly agree well the experimental results.
Keywords:circular cylinder  vortex-induced vibration  moving-mesh method  staggered mesh
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