• RESEARCH NOTES • Previous Articles    

The Effect of Sudden Change in Pipe Diameter on Flow Patterns of Air-Water Two-Phase

YANG Yingzhen; LI Guangjun; ZHOU Fangde; CHEN Xuejun   

  1. The State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong
    university, Xi’an 710049,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2001-03-28 Published:2001-03-28
  • Contact: YANG Yingzhen

垂直管中管径突变对空气-水两相流流型的影响(Ⅰ)突缩接头

杨英珍; 李广军; 周芳德; 陈学俊   

  1. The State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong
    university, Xi’an 710049,China
  • 通讯作者: 杨英珍

Abstract: Flow patterns upstream and downstream of a sudden-contraction cross-section in a vertical
straight pipe were presented. By comparing with flow patterns in uniform croes-section
vertical tubes, the effect of the sudden change in pipe diameter on flow patterns was
analyzed. Flow pattern transition mechanisms were discussed and transition criteria for
flow pattern transitions were deduced accordingly using the dimensional analysis.

Key words: gas-liquid two-phase flow, flow pattern, sudden-contraction cross-section

摘要: Flow patterns upstream and downstream of a sudden-contraction cross-section in a vertical
straight pipe were presented. By comparing with flow patterns in uniform croes-section
vertical tubes, the effect of the sudden change in pipe diameter on flow patterns was
analyzed. Flow pattern transition mechanisms were discussed and transition criteria for
flow pattern transitions were deduced accordingly using the dimensional analysis.

关键词: gas-liquid two-phase flow;flow pattern;sudden-contraction cross-section