通过CFD数值计算的方法,采用达西定律和k-ω SST模型,对管式膜在80 kPa恒定出口压力、不同流量下的过滤过程进行了流体动力学分析,揭示了其内部的流动规律,经试验验证,模拟计算结果与实验值吻合较好.分析结果表明:流量越大对膜内壁面的冲刷能力越强、涡旋扰动越剧烈、渗透流量越大、跨膜压差也越大,膜管内随着轴向距离的增加压力呈线性减小的趋势,压力值线性减小的斜率k随着流量Q(L/h)的增加而减小、基本符合k=-0.0125Q的关系.
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