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可视化实验研究了不同液/气流速和孔壁面浸润性对非均匀毛细多孔层内稳态饱和度、侵入时间及气、液微观传输特性的影响。结果表明:多孔层内液相饱和度及侵入时间均随液相侵入速率的增大而减小;亲水性多孔介质内液体优先选择小孔侵渗,且孔内侵渗速度变化较大;亲水性多孔层内的稳态气相饱和度随气相驱替速率的增加而增加,憎水性多孔层内的稳态气相饱和度随气相驱替速率的增加其波动幅度增大,两种多孔介质内气相驱替过程均呈毛细指进形态;气相驱替过程中,亲水性多孔层出口侧可渗透壁面上呈大气泡连续生长现象,憎水性多孔层出口侧可渗透壁面上呈小气泡断续生长现象。
The effects of different liquid / gas flow rates and wall wettability on the steady-state saturation, invasion time, gas and liquid micro-transmission characteristics of the non-uniform capillary porous layer were investigated by visualization experiments. The results show that the liquid saturation and the invasion time decrease with the increase of the liquid intrusion rate in the porous layer. The liquid in the porous porous medium preferentially selects the pore infiltration, and the infiltration velocity in the pore changes greatly. The steady-state gas-phase saturation in the hydrophilic porous layer increases with the increase of the gas-phase displacement rate. The steady-state gas saturation in the hydrophobic porous layer increases with the increase of the gas-phase displacement rate, and the two porous media In the process of gas phase displacement, the large porous bubble grows on the permeable wall on the exit side of the hydrophilic porous layer, while the bubble on the permeable wall on the outlet side of the hydrophobic porous layer is a small bubble. Continued growth phenomenon.