可压缩气体定常非Darcy渗流的流动分析及其应用

Analysis of Non-Darcy Steady Compressible Gas Flow In Porous Media and its Application

气体通过多孔介质的非Darcy流动具有广泛的工程应用背景 ,因此对多孔介质中的气体非Darcy流动进行流动分析有着非常重要的意义。然而 ,在通常的研究中 ,一般都将气体考虑为不可压缩流体 ,很少考虑气体的压缩性。对于高压气体以较高的速度通过多孔介质的情况 ,在进行流动分析时 ,不仅要考虑非Darcy效应 ,还必须考虑气体的压缩性。在本文中 ,对可压缩气体通过多孔介质的定常非Darcy流动进行了一维流动分析 ,得出了多孔介质中气体的压力分布和速度分布。还进一步给出了在高压差和高流速情况下 ,测定多孔介质材料渗透率和惯性系数的方法 ,以及多孔介质材料前后压力差与材料厚度的比 ΔpL 和材料前气流速度u1

The non-darcy gas flow in porous media has wide ap pl ications in the industrial fields. So analyzing the non-darcy gas flow in porou s media becomes very important. But few considerations are given to the compress ible effects of gas in most researches on the subject. Yet not only non-darcy e ffects, but also compressible effects must be considered in the research on gas flow in porous media when gas flows in porous materials with high velocity and h igh pressure. In this paper, an ID analysis of non-darcy steady gas flow in por ous media is given. A method used to calculate permeability and inertia coeffici ent of porous media when gas flows in porous materials with high speed and high difference of the pressure is presented. An analytical relation between Δ p/L (the ratio of the difference between the pressure at the fore and the back of the porous material to the length of the material) and u1 (the velocity in fron t of the material) is also given.