尾流中流固耦合的柔性薄板对低雷诺数圆柱绕流的被动控制研究

A Numerical Study on the Passive Control of Flow over Cylinder with a Flexible Plate

为了研究探讨尾流中带流固耦合边界的柔性薄板对低雷诺数圆柱绕流的影响,本文基于任意拉格朗日-欧拉方法 (ALE)、有限体积法,通过OpenFoam,在低雷诺数条件下,针对尾流区域的柔性薄板对主圆柱尾流场的被动控制效果进行了数值模拟。从涡脱频率、流场模式等角度剖析了其被动控制的物理机理。结果表明:柔性薄板对涡形成机制的改变是尾流场发生演化的主要原因,在间距比为2.0时可以较好地抑制涡的发生,形成较稳定的流线形涡结构。

A numerical study on the passive control of flow over cylinder with a flexible plate was carried out.The influence of gap distance between the plate and cylinder and elastic modulus of the flexible plate on the lift and drag coefficient of the cylinder is comprehensively studied.The physical mechanism of passive control is analyzed from the aspects of vortex separation frequency and flow field mode.The results show that the change of the formation mechanism of the vortex is the main reason for the evolution of the wake field.When the space ratio is 2.0,the vortex can be better inhibited and a more stable linear vortex structure can be formed.