双尺度密集纤维管束的多孔介质渗透特性

The Permeability Features of Densely Populated Fiber Bank With Dual Characteristic Scales

本研究结合实验和数值分析方法,研究了一种小型中空纤维膜组件的错流空气侧压降特性,对其中带有双尺度密集纤维管束的多孔介质渗透特性进行了分析。使用CFD(Computational Fluid Dynamic)的方法,对组件中心密集多孔空间/近壁孔隙空间中的流体流动特性进行了研究,重点研究了纤维管束内流量分配不均匀程度随组件入口风速的变化规律。通过实验和理论分析建立了双尺度多孔管束结构的渗透特性模型。

In this paper, a novel hollow fiber module is present. The pressure drop of the cross flow over the small unit is studied numerically and experimentally. The permeability features of the densely populated hollow fiber bank with dual characteristic scales are analyzed. Based on Computational Fluid Dynamics method, the flow velocity field inside the fiber bank and in the air gap between the unit shell and fiber bank is studied. The focus is on the effect of inlet Reynolds number. The permeability model of such kind of fiber bank is established.