亚临界雷诺数下的强迫振荡圆柱绕流数值模拟

摘要

The vortex's formation of a forced oscillating cylinder is simulated with a CFD software FLUENT by using viscous model k-omega at a subcritical Reynolds number of 10000, then computed the coefficient of lift force and drag force under different frequency in the lock-in region. After comparing with the expeftment's result, we find that the relative er-ror between both the coefficient of lift force and drag force and the experiment's result is 20% below, and analyze some possible reasons of error.%应用计算流体力学软件FLUENT模拟了亚临界雷诺数Re=10 000下强迫振动圆柱的涡街形成过程,应用k-w湍流模型进行计算,求出了其在锁定范围内不同振荡频率下的的升力系数和阻力系数.计算结果与实验值进行了比较,计算得到的升力系数和阻力系数相对误差在20％以内,最后分析了可能出现误差的原因.