Experimental characterization of air-entrainment in a plunging jet

被引：34
|
作者：
Qu, Xiaoliang [1 ]
Goharzadeh, Afshin [1 ]
Khezzar, Lyes [1 ]
Molki, Arman [1 ]
机构：
[1] Petr Inst, Dept Mech Engn, Abu Dhabi, U Arab Emirates
来源：
EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2013年 / 44卷
关键词：
Impinging jet; Particle Image Velocimetry; Flow map regime; Air entrainment; LIQUID JETS; FLOW; MECHANISM; REGION;
D O I：
10.1016/j.expthermflusci.2012.05.013
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
This paper presents a detailed experimental study of a plunging jet on a free liquid surface. An experimental characterization facility is designed and constructed for generating a vertical round water jet impinging on a free surface of a pool. The experimental analysis focuses on the jet penetration depth, its relation to impact velocity V-j and free jet falling length L-f. The results obtained are compared with previous studies. The flowmap for four different regimes, in terms of impact jet velocity is obtained. The details of the two-dimensional velocity field below the pool liquid free surface under a no-entrainment regime, are obtained using Particle Image Velocimetry (PIV) and reveal the spatial extent of the entrained region. The initial impact process and air cavity features are also investigated and compared with previous semi-theoretical results. (C) 2012 Elsevier Inc. All rights reserved.
引用
收藏
页码：51 / 61
页数：11
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