运用修正剪应力输运湍流模型模拟双自由度涡激振动

摘要/Abstract

摘要： 针对低质量比圆柱双自由度涡激振动振幅响应的数值模拟结果小于实验值的问题，基于OpenFOAM开源软件，对标准剪应力输运(SST)湍流模型以及数值模拟方法进行了修正，并通过圆柱绕流算例进行验证.运用扫频法，对约化速度为2~14，质量比m*=2.6的圆柱双自由度涡激振动进行了数值模拟，并对结果进行了详细的分析与对比.结果表明，与标准SST模型的结果相比，采用修正SST模型的数值模拟结果与实验数据更为接近，运用扫频法能更好地体现涡激振动的非线性特性.文中提出的修正模型可以应用于海洋立管涡激振动的预报.

关键词: 双自由度；涡激振动；湍流模型；扫频法；数值模拟

Abstract: According to the existing literature, the calculated results of numerical simulations of two degrees of freedom (DoFs) vortexinduced vibration with low mass ratio of column are not ideal. Especially, the maximum vibration amplitude is significantly smaller than the experimental value. In this paper, based on open source software OpenFOAM, the standard shear stress transport (SST) turbulence model and numerical simulation method are improved. Then, the vortex induced vibration of a cylinder with a mass ratio of 2.6 and a doubleDoF from 2 to 14 is simulated by the sweep frequency method, and the results of numerical simulation are analyzed and compared. Results show that the numerical simulation results of the improved SST turbulence model can be more close to the experimental data, and the sweep frequency method can better reflect nonlinear characteristics of the vortexinduced vibration.

Key words: two degrees of freedom; vortexinduced vibration; turbulence model; sweep frequency method; numerical simulation

中图分类号:

U 661.1

倪问池1,2,康庄1,张橙1,张立健1. 运用修正剪应力输运湍流模型模拟双自由度涡激振动[J]. 上海交通大学学报, 2017, 51(7): 819-825.

NI Wenchi1,2，KANG Zhuang1，ZHANG Cheng1，ZHANG Lijian1. Simulation of Two Degrees of Freedom VortexInduced Vibration by
Using Improved Shear Stress Transport Model[J]. Journal of Shanghai Jiao Tong University, 2017, 51(7): 819-825.

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