Longitudinal vortex structure in the flow field produced by a vortex ring impinging on a flat plate

被引：20

作者：

Naitoh, T ^{[1
]}

Banno, O ^{[1
]}

Yamada, H ^{[1
]}

机构：

[1] Nagoya Inst Technol, Dept Syst Engn, Showa Ku, Nagoya, Aichi 4668555, Japan

来源：

FLUID DYNAMICS RESEARCH | 2001年 / 28卷 / 01期

关键词：

vortex ring; longitudinal vortex; induced vortex; azimuthal instability; wall shear flow; smoke visualization method;

D O I：

10.1016/S0169-5983(00)00016-2

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The flow field produced by a vortex ring at Re = 2600 impinging on a flat plate was examined in detail using the smoke visualization method. The longitudinal Vortex structure with a finger-like configuration was found which plays a crucial role in forming azimuthal coherent structures with a cross section that resembles that of an orange; the structures promote the flow field into turbulent state. The generating and developing process of the longitudinal vortex are discussed, and the topological aspects are inferred by integrating the information obtained through various local visualizations. (C) 2001 The Japan Society of Fluid Mechanics and Elsevier Science B.V. All rights reserved.

引用

页码：61 / 74

页数：14

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