CIESC Journal ›› 2014, Vol. 65 ›› Issue (11): 4231-4237.DOI: 10.3969/j.issn.0438-1157.2014.11.003

• 流体力学与传递现象 • 上一篇    下一篇

矩形截面螺旋通道内弹状流的流动特性

刘献飞, 夏国栋, 杨光   

  1. 北京工业大学环境与能源工程学院, 强化传热与过程节能教育部重点实验室, 北京 100124
  • 收稿日期:2014-04-25 修回日期:2014-05-31 出版日期:2014-11-05 发布日期:2014-11-05
  • 通讯作者: 夏国栋
  • 基金资助:
    北京市自然科学基金项目(3142004);国家重点基础研究发展计划项目(2011CB710704).

Flow characteristics of slug flow in helical rectangular channel

LIU Xianfei, XIA Guodong, YANG Guang   

  1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, School of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
  • Received:2014-04-25 Revised:2014-05-31 Online:2014-11-05 Published:2014-11-05
  • Supported by:
    supported by the Natural Science Foundation of Beijing (3142004) and the National Basic Research Program of China (2011CB710704).

摘要: 对水平放置矩形截面螺旋通道内弹状流的流动特性进行了实验研究.通过实验获得了不同周角下的气弹演变过程和局部流动特征,结果表明,其流动特性会随着螺旋周角位置的变化而变化.根据实验数据分析发现,同一工况下,不同转角气弹的运动速度、频率和长度分布不尽相同.重力和离心力的相对大小决定着内外壁面液膜的厚度,给出了同一条件下,不同时刻的液膜厚度的演变过程.最后对下降液膜的运动速度展开了分析研究,在螺旋上升过程中,液膜下降速度逐渐减小,在螺旋下降段,液膜速度明显增大.

关键词: 气液两相流, 离心分离, 气泡, 液膜

Abstract: Experimental investigations on slug flow were carried out in horizontal helical rectangular channel by using high speed flow visualization. Evolution of slug in the whole helical rectangular channel was presented and the fine features of slug flow in different positions were illustrated. The slug characteristics changed along the axial direction due to the combined effects of gravitational and centrifugal force. Based on the experimental data, slug velocity, slug frequency and length distribution in different positions were given. The present topography measurement illustrated the evolution features of liquid film thickness, which was determined by the effect of centrifugal force and gravity. Liquid film falling velocity decreased as the slug moved upward and was visibly increasing in the downward flow.

Key words: gas-liquid flow, centrifugation, bubble, liquid film

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