摘要
用数值模拟方法对固定圆柱湍流涡脱落频率与弹性圆柱湍流涡致振动频率特性进行了研究,湍流计算模型采用标准k-ε模型,压力泊松方程提法基于非交错网格系统。研究结果表明:固定圆柱湍流绕流涡脱落频率基本不随雷诺数而变,对于同一固有频率弹性圆柱,涡振频率基本不随雷诺数而变;对于某一固定雷诺数流动涡振频率在一定范围内与系统固有频率有关。
The vortex shedding frequency in stationary circular cylinder and the frequency of vortex-induced vibration in an elastically mounted circular cylinder are investigated by numerical methods in the turbulent flow. It is found that the vortex shedding frequency does not vary with the increasing Reynolds number. The frequencies of an elastically mounted cylinder does not vary almost with Reynolds number for the same natural frequency. The vortex-induced vibration frequency depends on natural frequencies in some range for a fixed flow Reynolds number. The Navier-Stokes equations with pressure Poisson equation and standard k-ε model are adopted to solve the problems.
出处
《应用力学学报》
CAS
CSCD
北大核心
2009年第4期662-665,共4页
Chinese Journal of Applied Mechanics
基金
973计划项目(2006CB705400)
宁波旅港同乡会讲座基金
关键词
湍流
涡致振动
涡脱落
圆柱绕流
单自由度振动
vortex induced vibration, vortex shedding, flow around a circular cylinder, vibration of one-degree-of-freedom
