伴有相变过程的气-液两相渗流理论的研究

THEORETICAL STUDIES ON THE GAS-LIQUID TWOPHASE FLOW(INCLUDING A PHASE CHANGE)THROUGH POROUS MEDIA

伴有相变过程的气-液两相渗流是一个变质量传输问题。本文考虑到物理实际和公式的简单化形式,通过理想的多孔介质模型和局部平均化方法的运用,由质量守恒和动量守恒方程,进行了量纲分析,得出了伴有相变过程的气-液两相渗流的运动方程简单形式和相对渗透率表达式。对比表明达西公式以及以往的相对渗透率表达式对该流体的渗流进行描述是不恰当的,它将对物理实际产生较大的偏离。研究得出的渗流方程对伴有相变过程的气-液两相渗流有着重要的实用价值,并具理论意义和实际意义,揭示了伴有相变过程的气-液两相渗流的规律,丰富了气-液两相渗流的理论。

Mass transfer is included in the flow of a gas-liquid mixture through porous media with phase change. In this paper, taking the physical and practical condition into account and with a simplification of formula, using a model of ideal porous media and local equalization method. A simple dynamic equation and the relative permeability formula describing the flow of gas-liquid mixture through porous media is derived based on the theories of mass conservation and momentum conservation, and dimen-sional analysis. It is pointed out that description of the flow behavior of such a type by Darcy＇s law and a conventional relative permeability curves is not satisfactory. The studies show that the equations are useful both theoreticallv and partically.