均匀粘性流体中截断直立圆柱体受迫振荡的三维数值模拟

摘要

The problem of the uniform viscous flow around a forced oscillating vertical mounted circular cylinder is considered. Based on the incompressible Navier-Stokes equation, with the oscillating frequency equal to the period of the wake of the vortex, both the finite volume method and the PISO algorithm were employed for the numerically simulation. Some comparison to the force coefficient and fluid was made between the static cylinder and the forced oscillating cylinder. A sets of Reynolds number were taken to get the rule of the change of the force coefficient and the fluid around the cylinder.%研究了直立截断圆柱体受迫振荡时的三维绕流问题.以不可压缩Navier-Stokes方程为控制方程,采用有限体积法和PISO算法,以自身泻涡频率为振荡频率建立数值模型对受迫振荡圆柱体进行研究分析.分析对比了受迫振荡圆柱体与静止圆柱体力系数差别及流场特性,并取多组雷诺数对柱体的力系数和流场进行了研究分析,总结了受迫振荡圆柱体力系数幅值及平均力系数随雷诺数的变化规律.