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在清洁水渗流实验的基础上,开展了恒水头条件下不同浓度的含悬浮颗粒流体在多种填充粒径的多孔介质内的渗流实验。结果表明:悬浮颗粒在多孔介质段的沉积,并不一定使多孔介质局部相对渗透系数(k_t/k_0)降低,相反在一定情况下会出现局部相对渗透系数增大的情况。较小悬浮颗粒浓度下,悬浮颗粒粒径越小,曲线波峰出现越迟,相对渗透系数增加幅度越大;而较大进口浓度则抑制(k_t/k_0)曲线波峰的生成,直至相对渗透系数单调递减。通过包括前人实验数据在内的悬浮颗粒浓度C_0与颗粒直径比值d_p/D_p(悬浮颗粒直径/多孔介质颗粒直径)有无相对渗透系数增加现象的对照图,进一步揭示了含悬浮颗粒流体在多孔介质内的运移与沉积规律。
Based on the experimental results of seepage flow in clean water, the seepage experiments of suspensions with different concentrations of suspended particles in porous media with various particle sizes were carried out under constant head conditions. The results show that the deposition of suspended particles in porous media does not necessarily reduce the local relative permeability coefficient (k_t / k_0) of porous media. On the contrary, the local relative permeability coefficient may increase under certain conditions. The smaller the suspended particle concentration, the smaller the particle size of suspended particles, the longer the peak of the curve appeared and the larger the relative permeability coefficient increased, while the larger of the inlet concentration inhibited the formation of k_t / k_0 curve peak until the relative permeability coefficient monotone Decreasing. Through the comparison of the relative permeability coefficient increase between the concentration of suspended particles C_0 and the particle diameter ratio d_p / D_p (suspended particle diameter / porous medium particle diameter) including the experimental data of the predecessor, it is further revealed that the suspension containing the suspended particles in the porous Transport and deposition in the medium.