Air-water flows down stepped chutes: turbulence and flow structure observations

被引：180

作者：

Chanson, H ^{[1
]}

Toombes, L ^{[1
]}

机构：

[1] Univ Queensland, Dept Civil Engn, Brisbane, Qld 4072, Australia

来源：

INTERNATIONAL JOURNAL OF MULTIPHASE FLOW | 2002年 / 28卷 / 11期

关键词：

air-water flows; stepped cascade; turbulence; bubbles; droplets; cluster; experimental data;

D O I：

10.1016/S0301-9322(02)00089-7

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Interactions between turbulent waters and atmosphere may lead to strong air-water mixing. This experimental study is focused on the flow down a staircase channel characterised by very strong flow aeration and turbulence. Interfacial aeration is characterised by strong air-water mixing extending down to the invert. The size of entrained bubbles and droplets extends over several orders of magnitude, and a significant number of bubble/droplet clusters was observed. Velocity and turbulence intensity measurements suggest high levels of turbulence across the entire air-water flow. The increase in turbulence levels, compared to single-phase flow situations, is proportional to the number of entrained particles. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1737 / 1761

页数：25

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