水蒸气通过非均匀孔隙度多孔介质时流动特性的研究

对具有非均匀孔隙度分布的饱和多孔介质中注入水蒸气时汽液两相区的质量与能量守恒方程进行了求解,得到了相界面位置随时间变化的关系式,讨论了孔隙度分布及两相区平均饱和度对蒸气运动规律的影响.与实验对比后表明:至少对平均颗粒直径在0.3mm以上的多孔介质,本模型具有足够的精确度;对非均匀孔隙度影响的分析及结果是可靠的.

STUDY ON THE FLOW BEHAVIOR OF STEAM PROPAGATION THROUGH POROUS MEDIA WITH NON-UNIFORM POROSITY

The mass and energy conservation equations in vapor-liquid two-phase zone are solved for the case of steam injecting into a liquid-saturated porous media with non-uniform porosity. The variation of phase interface position with time is obtained. The influences of porosity distribution and averaged saturation in the two-phase zone on the steam flow behavior are also discussed. By comparing the theoretical results with the experimental data, it is found that the model presented in this paper can be used accurately for steam passing through a non-uniform porous media with more than 0 .3mm averaged particle diameters.