Direct numerical simulations of vortex breakdown in swirling jets

被引：21
|
作者：
Kollmann, W [1 ]
Ooi, ASH
Chong, MS
Soria, J
机构：
[1] Univ Calif Davis, MAE Dept, Davis, CA 95616 USA
[2] Univ Melbourne, MAME Dept, Parkville, Vic 3052, Australia
[3] Monash Univ, ME Dept, Clayton, Vic 3168, Australia
来源：
JOURNAL OF TURBULENCE | 2001年 / 2卷
关键词：
D O I：
10.1088/1468-5248/2/1/005
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Vortex breakdown in swirling free jets exhibits a rich variety of flow structures in a compact subdomain of the flow field. Model equations assuming steady and rotationally symmetric motion above a conical stream surface show bi- and multi-stability (Shtern and Hussain 1996 J. Fluid Mech. 309 1-44) of several flow forms, hysteresis and negative thrust phenomena. Direct numerical simulations are used to investigate the development of the conical jet layer and its break up into three-dimensional vortex structures for moderate Reynolds numbers. Three-dimensional flows for swirl numbers at and above the threshold value observed experimentally (Billant et al 1999 J. Fluid Mech. 376 183-219) are considered.
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页码：1 / 17
页数：17
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