Flooding in vertical counter-current annular flow

被引:29
作者
Karimi, G [1 ]
Kawaji, M [1 ]
机构
[1] Univ Toronto, Dept Chem Engn & Appl Chem, Toronto, ON M5S 3E5, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
D O I
10.1016/S0029-5493(99)00331-3
中图分类号
TL [原子能技术]; O571 [原子核物理学];
学科分类号
0827 ; 082701 ;
摘要
The hydrodynamic characteristics of falling liquid films inside a vertical tube (50.8 mm ID and 244 cm high) with counter-current interfacial shear at the onset of flooding have been investigated experimentally. High speed video photography and a flow visualization technique were utilized to investigate the mechanisms involved in the initiation of the flooding phenomenon over a wide range of liquid him Reynolds number (Re-L = Gamma 4/mu) from 1391 to 6584 at a distance of 150 cm from the liquid inlet. The present experimental data indicated neither the interfacial wave growth nor reversal in the wave propagation could be responsible for the initiation of flooding. Also the measured velocity profiles indicated only a slight reduction in liquid velocity within a narrow region very close to the gas-liquid interface, and no flow reversal in the liquid him at the measurement location. (C) 2000 Published by Elsevier Science S.A. All rights reserved.
引用
收藏
页码:95 / 105
页数:11
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