航空学报 > 1998, Vol. 19 Issue (5): 636-640

评二维非定常分离准则

吕志咏, 贾志刚   

  1. 北京航空航天大学流体力学研究所, 北京, 100083
  • 收稿日期:1997-01-13 修回日期:1998-04-15 出版日期:1998-10-25 发布日期:1998-10-25

COMMENT ON TWO DIMENSIONAL UNSTEADY SEPARATION CRITERIA

Lü Zhiyong, Jia Zhigang   

  1. Institute of Fluid Mechanics, Beijing University of Aeronautics and Astronautics, Beijing, 100083
  • Received:1997-01-13 Revised:1998-04-15 Online:1998-10-25 Published:1998-10-25

摘要:

说明二维非定常与三维定常比拟准则存在着一些内在的矛盾,进而说明用Lagrange方法揭示的二维非定常分离应该用染色线而不应用轨线来解释。

关键词: 非定常, 分离, 准则

Abstract:

It is shown that there are some discrepanicies in the analogy criteria of two dimensional unsteady separation and three dimensional steady separation. Furthermore, based on Lagrangian method to describe fluid motion, the unsteady separation phenomenon could be explained by means of streaklines rather than path lines.

Key words: unsteady flow, separation, cr iter ion

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