【摘要】 本文用快速涡方法对入射涡与圆柱的相互作用进行了数值模拟,观察到了入射涡在圆柱表面上诱导的二次分离和三次分离现象。二次涡的产生,与入射涡配对,改变了它们的运动轨迹。二次涡是入射涡“回跳”现象的主要原因。本文还对不同入射涡强度及相互位置作了计算,并分析了不同参数对涡运动轨迹的影响。这些现象与涡的无粘圆柱绕流有着本质的差异。更多还原

【Abstract】 The interaction between a pair of incident vortices and a circular cylinder has been simulated numerically by using a fast vortex method in present paper. A secondary and a tertiary vortices separated from the cylinder surface are, induced by the incident yortex, observed. Because of pairing with the secondary one, the incident vortex changes its trajectory. The ’rebounding’ phenomenon of the incident vortex is attributed to the effect of secondary vortex. This phenomenon has been vertified by flow visualization reported recently.更多还原