计算物理 ›› 2008, Vol. 25 ›› Issue (3): 259-262.

• 研究论文 • 上一篇    下一篇

不同分离距离的涡对融合

党会学, 陈志敏, 杨智春   

  1. 西北工业大学航空学院, 陕西 西安 710072
  • 收稿日期:2007-01-23 修回日期:2007-07-17 出版日期:2008-05-25 发布日期:2008-05-25
  • 作者简介:党会学(1982-),男,河北玉田,博士生,从事流固耦合与控制和涡动力学方面的研究.

Merging of Vortex Pair at Different Separating Distances

DANG Huixue, CHEN Zhimin, YANG Zhichun   

  1. School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2007-01-23 Revised:2007-07-17 Online:2008-05-25 Published:2008-05-25

摘要: 为研究涡对融合过程的非线性现象,将模型简化,用数值模拟方法,通过求解LES的N-S方程,得出不同分离距离的涡对融合过程.根据不同截面位置的流线变化,通过流场的拓扑结构,分析相互耦合涡对融合的机理及分离距离对融合过程的影响,及不同强度比例的涡对融合过程对漩涡位置的控制作用.结果表明,融合距离随分离距离增大呈非线性增加趋势,涡对分离距离的增加使其对漩涡位置的控制作用减弱.

关键词: 涡对, 融合, LES, 拓扑结构, 分离流

Abstract: To study nonlinear aerodynamics of merging vortex pair, a simplified model is employed to obtain merging at different separating distances by solving N-S equations in an LES turbulence model. Interactions of vortex merging, effects of separation distance on merging and control of vortex position by merging of vortex pair with different vortex strength ratios are analyzed with topological structure of streamlines. It is shown that merging distance increases nonlinearly with separating distance. Increasing separation distance decreases ability to control vortex position.

Key words: vortex pair, merging, LES, topological structure, separating flow

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