【摘要】 在多孔介质中 ,通过对低速渗流气体的摩阻系数 f与雷诺数Re的实验关系分析得出 ,随着雷诺数减小 ,气体的渗流规律表现出由遵从达西线性关系连续转变为非线性关系 ,其转变所对应的雷诺数 Rec =(1.0 ～ 4.4)× 10 -4 。由动力学分析可知 ,低速渗流气体出现的非线性现象是由气体分子与孔隙壁的作用引起 ,并给出了相应条件下渗流速度V与压力梯度Δp/ΔL的关系更多还原

【Abstract】 The experiment data about friction resistance coefficients f and Reynoid numbers Re are analyzed to study the law of gas flow at low velocity in tight porous media. As Re decreases, the porous flow of gas shows nonlinear phenomena deviation off Darcy’s law linear phenomena, and corresponding Re c=(1.0～4.4)×10 -4. The collisions occurred between gas molecule and pore wall cause the nonlinear phenomena. The relationship of flow velocity V and pressure grade Δp/ΔL is given according to theory analysis.更多还原