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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference 2007 >NUMERICAL SIMULATION OF VORTEX SHEDDING PAST A CIRCULAR CYLINDER IN A CROSS-FLOW AT LOW REYNOLDS NUMBER WITH FINITE VOLUME TECHNIQUE PART 2: FLOW-INDUCED VIBRATIONS
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NUMERICAL SIMULATION OF VORTEX SHEDDING PAST A CIRCULAR CYLINDER IN A CROSS-FLOW AT LOW REYNOLDS NUMBER WITH FINITE VOLUME TECHNIQUE PART 2: FLOW-INDUCED VIBRATIONS

机译：有限体积技术在低雷诺数下横流绕过圆柱绕流的涡流数值模拟：第2部分：流动引起的振动

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摘要

This paper is the sequel of the work exposed in a companion publication dealing with forced oscillations of a circular cylinder in a cross-flow. In the present study, oscillations of the cylinder are now directly induced by the vortex shedding process in the wake and therefore, the former model used for forced oscillations has been modified to take into account the effects of the flow in order to predict the displacement of the cylinder. The time integration of the cylinder motion is performed with an explicit staggered algorithm whose numerical damping is low. In the first part of the paper, the performances of the coupling procedure are evaluated in the case of a cylinder oscillating in a confined configuration for a viscous flow. Amplitude and frequency responses of the cylinder in a cross-flow are then investigated for different reduced velocities U~* ranging from 3 to about 15. The results show a very good agreement at Re=100 and the vortex shedding modes have also been related to the frequency response observed. Finally, some perspectives for further simulations in the turbulent regime (at Re=1000) with structural damping are presented.
机译：本文是在伴随出版物中公开的工作的续集，该出版物涉及在横流中圆柱的强制振荡。在本研究中，圆柱体的振动现在是由尾流中的涡流脱落过程直接引起的，因此，对用于强迫振动的前一个模型进行了修改，以考虑流动的影响，从而预测圆柱的位移。圆柱体。汽缸运动的时间积分是通过数值阻尼很低的显式交错算法执行的。在本文的第一部分中，在圆柱体以受限构造摆动以产生粘性流的情况下，评估了耦合过程的性能。然后研究了横流中圆柱的幅度和频率响应，其范围是从3到大约15的不同降低的速度U〜*。结果表明，在Re = 100时有很好的一致性，涡旋脱落模式也与观察到的频率响应。最后，给出了在具有结构阻尼的湍流状态（Re = 1000）下进行进一步仿真的一些观点。

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