均匀来流中振动圆柱尾迹涡结构的数值研究  

Numerical Study on the Vortex Structures in the Wake of an Oscillating Circular Cylinder in an Uniform Flow

作　　者：陆夕云[1] 童秉纲[1] 庄礼贤[1] 尹协远[1] 

机构地区：[1]中国科学技术大学近代力学系,合肥230026

出　　处：《水动力学研究与进展（A辑）》1995年第1期9-19,共11页Chinese Journal of Hydrodynamics

摘　　要：本文从涡量流函数形式的N-S方程出发,对于不同的振动频率、振幅,首次数值研究了均匀来流中沿任意方向(参见图1,0°<B<90°)振动的圆柱粘性绕流的涡脱泻现象。文中着重探讨了近迹复杂的涡结构及其非定常演化过程,不仅能够再现实验研究中所发现的一些重要的流动现象,同时还进一步预示了某些新的流场结构,使数值计算起到与实验研究相辅相成的作用。Vortex shedding from a circular cylinder subjected to forced oscillations at arbitrary angles (as shown in Fig. 1 for 0°<β<90°) with respect to the free stream is numerically investigated using the Navier-Stokes equations. The emphasis of this study is put on revealing the complicated vortex structures in the near wake and their evolution. In the present study, a number of possible vortex modes are numerically simulated, and a variety of experimentally investigated phenomena are duplicated numerically. A parameter map indicating the classification of preferred vortex modes is firstly given in the frequency-amplitude plane.

关 键 词：非定常流 分离 流 粘性流体力学 涡流 

分 类 号：O357.1[理学—流体力学]