水平管泡状流液相速度分布与相分布  

Measurements of Local Liquid Velocity and Interfacial Parameters of Air-Water Bubbly Flows in a Horizontal Tube

作　　者：杨建[1] 张鸣远[1] 张超杰[1] 苏玉亮[1] 任长春[2] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]吉林大学包装学院,长春130012

出　　处：《核科学与工程》2002年第3期244-249,共6页Nuclear Science and Engineering

摘　　要：用热膜探针测量了内径为 3 5mm的水平管泡状流中的液流速度 ,同时用双头电导探针测量了有关的相界面参数 ,结果表明 ,局部液流平均速度在靠管道下部的分布与单相液流的分布类似 ,在靠管道上部突然减小 ;局部液流平均速度在靠管道下部随气流折算速度的增加而增加 ,在靠管道上部则随气流折算速度的增加而减小 ;局部含气率和气泡频率随气流折算速度的增加而增大 ,在靠近管道上壁处有一峰值 。Distribution of local kinematic parameters of air water bubbly flows in a horizontal tube with an ID of 35 mm was investigated. The local liquid velocity was measured with a cylindrical hot film probe, and local void fraction, bubble frequency and bubble velocity were measured with a double sensor probe. It was found that the axial liquid velocity has a same profile as that of single liquid phase flow in the lower part of the tube, and it suffers a sudden reduction in the upper part of the tube. With increasing airflow rate, the liquid velocity would increase in the lower part of the tube, and further decrease at the upper part of the tube, respectively. Most bubbles are congested at the upper part of the tube, and the void fraction and bubble frequencies have similar profile and both are asymmetrical with the tube axis with their maximum values located near the upper tube wall.

关 键 词：水平管 泡状流 液相 速度分布 相分布 界面参数 液流速度 电导探针 热膜测速仪 

分 类 号：TB126[理学—工程力学] O35[理学—力学]