基于CFD数值模拟研究不同排列方式的两圆柱体涡激振动问题,采用ANSYS/CFX计算刚性圆柱体和弹性圆柱体的涡激升力和脉动拖曳力及上下游圆柱体和横流向相邻圆柱体的涡激升力和脉动拖曳力.基于数值分析结果分析流固耦合效应对圆柱体涡激振动的影响及尾流干涉现象对尾流圆柱体和边界效应对横向相邻圆柱体涡激振动的影响.研究表明,尾流干涉及流固耦合作用将增大尾流圆柱体的涡激升力和脉动拖曳力；边界效应和流固耦合对垂直来流的两圆柱体涡激升力和脉动拖曳力有增强作用,并造成两圆柱体涡激升力之间产生的相位差最大为180°.%The vortex-induced vibration of multi-cylinders was investigated based on CFD simulation. The lift and drag forces induced by vortex shedding of a rigid, an elastic, two tandem and side-by-side cylinders were calculated using the software ANSYS/CFX. The effects of wake interference, boundary effect and fluid-structure interaction were discussed based on the calculated results. The results showed that the lift and oscillating drag forces of the wake cylinder are enhanced significantly by wake interference and fluid-structure interaction; the lift and oscillating drag forces of two side-by-side cylinders can be enhanced by boundary effect and fluid-structure interaction; a phase discrepancy occurs between the lift forces of two side-by-side cylinders and the maximum phase discrepancy is 180°.
展开▼
