三维横向流体诱发直管振动的数值模拟

冯志鹏; 臧峰刚; 张毅雄

doi:10.3879/j.issn.1000-0887.2013.12.010

三维横向流体诱发直管振动的数值模拟

doi: 10.3879/j.issn.1000-0887.2013.12.010

中国核动力研究设计院核反应堆系统设计技术重点实验室, 成都 610041

详细信息

作者简介:
冯志鹏（1986—），男，甘肃会宁人，工程师，博士(通讯作者. E-mail: zhipengfeng1@163.com).

中图分类号: O322
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- 被引次数: 0
出版历程
- 收稿日期: 2013-07-15
- 修回日期: 2013-07-28
- 刊出日期: 2013-12-16

Numerical Simulation of Uniform Tube Vibration Induced by 3-Dimensional Cross-Flow

Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610041, P.R.China

摘要

摘要: 基于有限体积法和有限元法，结合动网格控制技术，建立了横向流体作用下三维弹性直管流致振动计算的数值模型，实现了计算结构动力学与计算流体力学之间的联合仿真．首先，通过对刚性管的静止绕流计算，研究了网格离散方式和不同湍流模型对圆柱类结构静止绕流流场特征的影响和预测能力，得到了适用于双向耦合分析的CFD模型；其次，利用基于双向流固耦合方法的流致振动模型，计算并分析了流体力与结构位移间的相位关系，指出流体力与位移间的相位差是由流体力引起的，同时对双向耦合和单向耦合进行了比较分析；最后通过对直管流致振动的数值计算，联合管表面压力、尾流区时均速度、分离角等时均量，分析了尾流区的流场特征.
- 横流诱发振动 /
- 计算流体力学 /
- 有限体积法 /
- 湍流模型 /
- 有限元法
Abstract: A 3-dimensional numerical model for elastic uniform tube vibration induced by cross flow was proposed based on the finite volume method and finite element method combined with dynamic mesh technique. The model presented a 3-dimensional fully coupled approach to solve the fluid flow and the structure vibration simultaneously. First, the capability of various mesh discretization forms and different turbulent models in prediction of turbulent flow characteristics was investigated through computation of turbulent cross flow around a rigid tube, and the CFD model for flow induced vibration was obtained. Second, based on the flow induced vibration model, the phase difference between fluid load and vibration displacement was also studied, and the results indicated that the difference was caused by the fluid load. Meanwhile, the results of 1-way coupling calculation were compared with that of 2-way coupling. Finally, the wake characteristics were analyzed with some time-averaged parameters including pressure distribution on the tube surface, flow velocity and separation angle in the wake of the vibrating tube.
- cross flow induced vibration /
- CFD /
- FVM /
- turbulent model /
- FEM

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参考文献(11)

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