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›› 2004, Vol. 21 ›› Issue (3): 322-327.DOI: 10.7523/j.issn.2095-6134.2004.3.006

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Investigation on the Void Fraction Propagation of Gas-Liquid Two-Phase Flow in Tubes

YANG JianHui1, 2, LU WenQiang1, LI Qing2, WU Feng3, GUO FangZhong4   

  1. 1. Department of Physics, Graduate School, Chinese Academy of Sciences, Beijing 100039, China;
    2. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China;
    3. Department of Physics and Heat Engineering, Wuhan Institute of Chemical Technology, Wuhan 430073, China;
    4. Cryogenic Laboratory, Huazhong University of Science and Technology, Wuhan 430073, China
  • Received:2003-06-24 Revised:2003-10-28 Online:2004-05-10

Abstract:

This paper presents a dynamic propagation view that the continuity wave and dynamic wave acting on each other results in the non linear solution under certain flow conditions. Based on the drift flux model and empiric formula, hyperbolic equation of one dimensional gas liquid two phase flow is deduced, wave theory approach is performed in detail by using characteristic curve method. The numerical analysis shows flow pattern transition location propagates downstream ward for lower void fraction while it moves upstream ward for higher void fraction. Flow pattern transition would not occur for very high void fraction. The calculations show that the inception of flow pattern transition is at the void fraction of 0.27 and the flow pattern transition stops at the void fraction of 0.58, which is in good agreement with experimental results in literatures.

Key words: voidage distribution, gas-liquid two phase flow, flow pattern transition

CLC Number: