航空学报 > 2003, Vol. 24 Issue (6): 503-506

大迎角细长旋成体绕流结构演变过程实验研究

刘沛清, 邵延峰, 邓学蓥, 马宇   

  1. 北京航空航天大学流体力学研究所 北京 100083
  • 收稿日期:2002-11-13 修回日期:2003-03-01 出版日期:2003-12-25 发布日期:2003-12-25

Experimental Study of the Evolutionary Process of the Flowfield Around Slender Body at High Angle of Attack

LIU Pei-qing, SHAO Yan-feng, DENG Xue-ying, MA Yu   

  1. Fluid Mechanics Institute; Beijing University of Aeronautics and Astronautics; Beijng100083; China
  • Received:2002-11-13 Revised:2003-03-01 Online:2003-12-25 Published:2003-12-25

摘要: 通过烟流显示和测压实验, 系统地观察和分析了尖拱头细长旋成体绕流结构随迎角的演变过程。实验发现在不同迎角下, 不仅细长旋成体绕流结构形态不同, 而且不同流态结构的演变过程所含迎角范围较小,几乎在几度迎角内就可完成。

关键词: 细长旋成体, 非对称涡, 大迎角, 流动显示, 非定常性

Abstract: Based on v isualizing and tr acking t he flow by smoke stream and surface pr essure measurement, the entire process o f t he flow behavior around a slender og ive cylinder at angles of at tack from 0°to 90°is observ ed and analy zed systematically. It is found that in the exper iment, at various angles of attack, the structur e of the flowfieldaround the slender body is differ ent and the r ange of the angles of attack invo lved by the evolvement process is small.The evolvement pro cess can mainly be finished in a small rang e of angles of attack.

Key words: slender body, asymmetric vortices, high angle of attack, flow visualization, unsteady character

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