计算物理 ›› 2013, Vol. 30 ›› Issue (1): 53-60.

• 论文 • 上一篇    下一篇

转捩边界层中的上喷下扫运动

陈林, 袁湘江   

  1. 中国航天空气动力技术研究院, 北京 100074
  • 收稿日期:2012-03-30 修回日期:2012-08-27 出版日期:2013-01-25 发布日期:2013-01-25
  • 作者简介:陈林(1982-),男,江苏扬州,工程师,从事计算流体力学、边界层转捩直接数值模拟方面的研究,E-mail:chenlincfd@gmail.com

Ejection and Sweep Flows in Transitional Boundary Layers

CHEN Lin, YUAN Xiangjiang   

  1. China Academy of Aerospace Aerodynamics, Beijing 100074, China
  • Received:2012-03-30 Revised:2012-08-27 Online:2013-01-25 Published:2013-01-25

摘要: 采用高精度直接数值模拟方法,研究平板可压缩流边界层转捩后期过程中的上喷和下扫运动.模拟结果清楚地显示了边界层转捩过程中的上喷下扫运动的复杂现象,展示与典型涡系及尖峰结构的紧密联系.详细剖析多层次的上喷下扫运动的形成机制,数值结果证实了实验的新发现,并进行相应的机理分析.

关键词: 边界层, 转捩, 上喷, 下扫, 直接数值模拟

Abstract: At late stages of compressible transitional boundary layers over a flat-plate, ejection and sweep flows are investigated by means of direct numerical simulation with high order accuracy. Numerical results with high resolution clearly represent complex phenomena of ejection and sweep flows in the transition process of boundary layers. Close relationships with typical vortex structures and spike structures are revealed. Details of formation mechanisms of ejection and sweep flows are analyzed. Numerical results demonstrate experimental findings. Corresponding mechanisms are analyzed.

Key words: boundary layers, transition, ejection, sweep, direct numerical simulation

中图分类号: