METAMORPHOSIS OF A HAIRPIN VORTEX INTO A YOUNG TURBULENT SPOT

被引：77

作者：

SINGER, BA ^{[1
]}

JOSLIN, RD ^{[1
]}

机构：

[1] NASA, LANGLEY RES CTR, HAMPTON, VA 23681 USA

来源：

PHYSICS OF FLUIDS | 1994年 / 6卷 / 11期

关键词：

D O I：

10.1063/1.868363

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Direct numerical simulation was used to study the formation and growth of a hairpin vortex in a flat-plate boundary layer and its later development into a young turbulent spot. Fluid injection through a slit in the wall triggered the initial vortex. The legs of the vortex were stretched into a hairpin shape as it traveled downstream. Multiple hairpin vortex heads developed between the stretched legs. New vortices formed beneath the streamwise-elongated vortex legs. The continued development of additional vortices resulted in the formation of a traveling region of highly disturbed flow with an arrowhead shape similar to that of a turbulent spot.

引用

页码：3724 / 3736

页数：13

共 39 条

[1] A STUDY OF HAIRPIN VORTICES IN A LAMINAR BOUNDARY-LAYER .1. HAIRPIN VORTICES GENERATED BY A HEMISPHERE PROTUBERANCE [J].