错列双圆柱涡激振动干涉数值模拟  

Numerical Simulation on Vortex-induced Vibration Interference of Staggered Double Cylinders

作　　者：张睿 娄敏[1] 王晓凯 赵德光 Zhang Rui;Lou Min;Wang Xiaokai;Zhao Deiguang(School of Petroleum Engineering,China University of Petroleum(East China);Offshore Oil Engineering(Qingdao)Co.,Ltd.)

机构地区：[1]中国石油大学(华东)石油工程学院,山东省青岛市266580 [2]海洋石油工程(青岛)有限公司

出　　处：《石油机械》2022年第9期85-92,共8页China Petroleum Machinery

基　　金：国家重点研发计划项目“超深水多用途柔性管的研制与示范”(2016YFC0303800);国家自然科学基金项目“深水热塑性复合材料柔性管关键技术研究”(U2006226)。

摘　　要：为进一步探究影响错列双圆柱涡激振动特性的敏感间距及排列角度,基于重叠网格技术进行网格划分,将振动模型简化为双自由度系统,建立了二维流固耦合数值模型,使用四阶龙格库塔法求解振动方程,编译用户自定义函数(UDF)并结合Fluent动网格技术进行求解;在对所建模型进行验证的基础上,对错列双圆柱开展涡激振动响应研究,研究间距比、来流角度和约化速度对错列双圆柱涡激振动特性的影响。研究结果表明:当间距比和来流角度较小时,错列两圆柱的流动干涉作用较为强烈,两圆柱的运动轨迹较为杂乱;随着间距比和来流角度的增大,圆柱的运动轨迹逐渐变得规则,两圆柱轨迹间的差异越来越小,上游圆柱和下游圆柱的运动轨迹将慢慢趋于一致;在间距比S/D=3时,流体与圆柱之间的耦合作用非常强烈,不能在圆柱后方形成规则脱落的漩涡;在高约化速度下,与其他间距比相比,下游圆柱受到上游圆柱尾涡脱落的影响更大,在横流向产生更大的振幅;下游圆柱也对上游圆柱产生“抑制”,使上游圆柱的尾涡变得细长。所得结论可为实际海洋立管的布置提供参考。In order to further explore the sensitive spacing and arrangement angle affecting the vortex-induced vibration behaviors of staggered double cylinders,mesh division was completed with the support of the overset mesh technology,the vibration model was simplified to a two-degree-of-freedom system,and a two-dimensional fluid-solid interaction numerical model was built.Then,the fourth-order Runge-Kutta method was used to solve the vibration equation,the user-defined function(UDF)was compiled and the Fluent dynamic mesh technology was combined to get solution.On the basis of verifying the model built,the vortex-induced vibration response of staggered double cylinders was investigated to explore the effects of spacing ratio,flow angle and reduced velocity on the vortex-induced vibration behaviors of staggered double cylinders.The study results show that when the spacing ratio and the flow angle are small,the flow interference effect of the staggered double cylinders is relatively strong,and the kinematic trajectory of the staggered double cylinders is chaotic.As the spacing ratio and the flow angle increase,the kinematic trajectory of the staggered double cylinders gradually becomes regular,the difference between the kinematic trajectories of upstream and downstream cylinders becomes smaller and smaller and gradually tends to be consistent.When the spacing ratio S/D=3,the interaction between the fluid and the cylinders is very strong,and the regular shedding vortex cannot be formed behind the cylinders.At high reduced velocity,compared with other spacing ratios,the downstream cylinder is more affected by the trailing vortex shedding of the upstream cylinder and produces greater amplitude in the transverse direction.The downstream cylinder also“inhibits”the upstream cylinder,making the trailing vortex of the upstream cylinder slender.The conclusions provide reference for the arrangement of actual marine risers.

关 键 词：海洋立管 错列圆柱 涡激振动 流固耦合 约化速度 间距比 横流向 

分 类 号：TE952[石油与天然气工程—石油机械设备]