Multiple helical modes of vortex breakdown

被引：39

作者：

Sorensen, J. N. ^{[1
,2
]}

Naumov, I. V. ^{[3
,4
]}

Okulov, V. L. ^{[1
,2
]}

机构：

[1] Tech Univ Denmark, Dept Mech Engn, DK-2800 Lyngby, Denmark

[2] Tech Univ Denmark, Ctr Fluid Dynam, DK-2800 Lyngby, Denmark

[3] SB RAS, Inst Thermophys, Novosibirsk 630090, Russia

[4] Novosibirsk State Univ, Novosibirsk 630090, Russia

来源：

JOURNAL OF FLUID MECHANICS | 2011年 / 683卷

关键词：

vortex breakdown; vortex instability; SWIRLING FLOW; AXIAL-FLOW; VORTICES; STABILITY;

D O I：

10.1017/jfm.2011.308

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Experimental observations of vortex breakdown in a rotating lid-driven cavity are presented. The results show that vortex breakdown for cavities with high aspect ratios is associated with the appearance of stable helical vortex multiplets. By using results from stability theory generalizing Kelvin's problem on vortex polygon stability, and systematically exploring the cavity flow, we succeeded in identifying two new stable vortex breakdown states consisting of triple and quadruple helical multiplets.

引用

页码：430 / 441

页数：12

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