Two-phase flow characteristics across sudden contraction in small rectangular channels

被引：25

作者：

Chen, Ing Youn ^{[1
]}

Chu, Mon-Chern ^{[1
]}

Liaw, Jane-Sunn ^{[2
]}

Wang, Chi-Chuan ^{[2
]}

机构：

[1] Natl Yunlin Univ Sci & Technol, Dept Mech Engn, Yunlin 640, Taiwan

[2] Ind Technol Res Inst, Energy & Environm Res Labs, Hsinchu 310, Taiwan

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2008年 / 32卷 / 08期

关键词：

two-phase flow; flow pattern; pressure drop; sudden contraction; vena contracta;

D O I：

10.1016/j.expthermflusci.2008.05.009

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This study examines the two-phase flow pattern change and pressure drop at the sudden contraction from small rectangular channels (3 x 9 mm and 3 x 6 mm) into a 3 mm diameter tube. A unique deflection of contraction pressure drop vs. vapor quality is observed at a very low quality regime with an unusual "liquid like vena contracta". The measured pressure drops are compared with existing correlations/models, but none of them can accurately predict the available database. By proposing a correction factor accounting for the influence of surface tension (Bond number and contraction ratio) to the original homogeneous model, considerable improvement of the predictive ability of homogeneous model is arrived. The mean deviation of this correlation is 26.18% applicable to the present data (80 points) and available literatures (357 points). (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：1609 / 1619

页数：11

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