水平管运动液塞气泡界面特征研究  

Dispersed Bubble Characteristics of Moving Liquid Slug in Horizontal Pipe

作　　者：王鑫[1] 王同吉[1,2] 祁雷 何利民[1] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266580 [2]中国石化青岛液化天然气有限责任公司,山东青岛266400

出　　处：《工程热物理学报》2013年第9期1687-1691,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50806083);山东省自然科学基金资助项目(No.ZR2011EEM029);中央高校基本科研业务费专项资金(No.09CX04021A)

摘　　要：在水平长环道上实验研究了段塞流型运动液塞的气泡分布特征,采用单头和双头电导探针测量弥散气泡界面。提出了一种液塞轴向分段的方法实现对双头电导探针测量气泡信号的处理,从而得到局部平均含气率、气泡频率、气泡速度等参数在液塞轴向与径向的分布规律。实验发现在运动液塞头部区域,含气率和频率径向分布存在峰值,表明液塞头部存在湍流剪切层。随着气体折算速度的增大,剪切层的湍流强度变大。随着进入液塞距离的增大,气泡速度分布逐渐达到充分发展。An experimental facility with long horizontal loop was constructed to study the bub- ble characteristics in moving liquid slug. The distribution of dispersed bubble was measured by single-sensor and double-sensor conductivity probes. An axial segmentation method is developed to calculate the signals of double-sensor conductivity probe. The moving liquid slug is divided into several sections in the axial direction and the radial and axial distributions of local mean void fraction, bubble frequency and bubble velocity were measured. It is found that in the head region of the moving liquid slug there are peaks in the radial distributions of void fraction and bubble frequency, confirmed the existence of a turbulence shear layer. With increasing of the gas superficial velocity, the turbulent intensity of the turbulent shear layer increases. The distribution of bubble velocity is fully developed after some distance into the liquid slug.

关 键 词：两相流 段塞流 相分布 

分 类 号：O359[理学—流体力学]