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首页> 外文期刊>Transactions of the Japan society for aeronautical and space sciences >Computed Flow around an Oscillating Circular Cylinder
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Computed Flow around an Oscillating Circular Cylinder

机译：振荡圆柱周围的计算流

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摘要

The oscillation of a circular cylinder in a uniform flow is not only one of the basic subjects of fluid dynamics, but is also a very important problem in fluids engineering. In the present paper, the cross-flow and in-line vibrations of a two-dimensional circular cylinder were studied numerically. Both the forced and free vibrations were examined. Vortex shedding became synchronized with the forced cross-flow vibration at a frequency close to that of the Strouhal number of a stationary cylinder. With forced in-line vibration, vortex shedding began to synchronize with the frequency and also one half that of a circular cylinder at a higher vibration rate. With free vibration, the cross-flow vibration was excited when the natural frequency of the cylinder was near the stationary Strouhal number, and in-line vibration was observed near the natural frequency at around twice the stationary Strouhal number.
机译：圆柱体在均匀流动中的振荡不仅是流体动力学的基本主题之一，而且还是流体工程中非常重要的问题。本文对二维圆柱的横流和直列振动进行了数值研究。检查了强制振动和自由振动。涡流脱落与强迫横流振动同步，其频率接近固定气缸的Strouhal数。在强制在线振动的情况下，涡旋脱落开始与频率同步，并且在更高的振动速率下也开始与圆柱体的频率同步。在自由振动的情况下，当圆柱的固有频率接近固定的Strouhal数时，会激发横流振动，并且在固有频率附近以两倍的固定Strouhal数观察到线内振动。

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