均匀流中横向振荡圆柱绕流场的数值分析

Numerical simulation of circular cylinder oscillating transversely in a uniform stream

针对工程中关心的振荡圆柱绕流问题,采用同位网格系统中的 SIMPLE算法求解 N S方程,以及动网格技术模拟圆柱的运动边界,对均匀来流中的横向振荡圆柱绕流场进行数值模拟,计算了振荡圆柱升力系数、阻力系数随时间的变化曲线,以及不同相位时的流线矢量图和涡量等值线分布图。为验证模型的可靠性,对静水中的振荡圆柱流场进行模拟,与实验及数值计算结果吻合较好。

Aiming at the problem of flow around oscillating cylinder concerned in engineering, a circular cylinder oscillating transversely in a uniform stream is simulated by solving the N-S equations with SIMPLE algorithm in the system of colocated grids and dynamic mesh simulating moving boundary of the cylinder. Lift coefficient and drag coefficient changing with time are computed, picture of streamlines and vortex contours at different phases are given. Circular cylinder oscillating in water at rest is simulated to validate the model and the result compared with experimental and numerical simulation data is in good agreement.