基于CFX圆柱涡激振动的数值模拟研究

基于k-ω SST湍流模型研究了典型亚临界状态下（Re=3900）二维圆柱的涡激振动。通过将圆柱简化为不同刚度的质量弹簧系统，并运用CFX的动网格与CEL功能，研究了刚度系数对圆柱涡激振动的影响。研究观察到了圆柱涡激振动的“锁定”现象、自限定现象以及漩涡脱落模态从2P到2S的转变过程，并得出了圆柱涡激振动特性随刚度变化的规律。

Numerical simulation of vortex-induced vibration of a circular cylinder using CFX code

A numerical simulation of vortex-induced vibration of circular cylinder for a fixed Reynolds number equal to 3900 was presented. The CFX code was employed to solve the 2d N-S equations with the k-ω SST turbulence model. The circular cylinder simplified as a mass-spring system with different stiffness was researched with the dynamic mesh and CEL function of CFX code. Research presented the “lock in” phenomena, “self limited” phenomena of vortex-induced vibration and the transition of the model of vortex shedding between “2P” to “2s”. The effect of stiffness to the character of vortex-induced vibration was presented here also.