Flow characteristics and control of vertical upward gas-liquid two-phase flow through a sudden contraction pipe

被引：1
|
作者：
Voutsinas, Alexandros [1 ]
Shakouchi, Toshihiko [1 ]
Takamura, Junichi [1 ]
Tsujimoto, Koichi [1 ]
Ando, Toshitake [1 ]
机构：
[1] Mie Univ, Grad Sch Engn, Tsu, Mie 5148507, Japan
来源：
JSME INTERNATIONAL JOURNAL SERIES B-FLUIDS AND THERMAL ENGINEERING | 2006年 / 49卷 / 04期
关键词：
gas-liquid two-phase flow; sudden contraction pipe; flow control; drag reduction; fluctuating flow;
D O I：
10.1299/jsmeb.49.1000
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The flow characteristics of upward gas-liquid two-phase flow through a vertical sudden contraction pipe is an area that has been less studied experimentally and numerically and that is still little known((1)-(3)). The drag and its reduction for an upward bubbly two-phase flow in a sudden contraction pipe are investigated. Vortices are generated just prior to and after contraction and they significantly affect the flow characteristics. A simple and economical method to control and smoothen the flow is proposed by mounting a small obstacle (ring) upstream the contraction. The effects of ring position, Reynolds number and volumetric gas flow rate are examined and positive results were seen in all flow conditions. Moreover, the pressure fluctuation phenomenon and its control downstream the contraction was considered.
引用
收藏
页码：1000 / 1007
页数：8
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