Flow properties are investigated for a non-crimp glass fabric with large meso-channels designed for high-permeability, as compared to glass twill woven fabric. Saturated and unsaturated permeability are measured through in-plane, unidirectional, constant-pressure flow experiments. Capillary effects are evaluated following a novel approach based on the ratio of unsaturated and saturated permeability for a set of experiments conducted at capillary numbers varying over a large range from $\sim 4·{10}^{-5}$ to $4·{10}^{-1}$. The mesoscopic pore-space of the compacted fabrics is imaged with X-ray Tomography, and analyzed to propose permeability predictions based on the channels geometry, which correspond well to experimental results. Permeability is governed by viscous flow in the meso-channels. As a result, provided that the capillary number exceeds a threshold value, the permeability can be rather accurately measured in these dual-scale fabrics by carrying out unsaturated measurements, neglecting micro-flow and capillary effects.

与玻璃斜纹织物相比，研究了具有大中观通道设计以实现高渗透性的非卷曲玻璃织物的流动性能。饱和渗透率和非饱和渗透率是通过面内单向恒压流动实验测量的。毛细管效应是根据一种新方法评估的，该方法基于不饱和渗透率与饱和渗透率之比，针对在较大范围内变化的毛细管数下进行的一组实验$〜4·{10}^{--5}$ 到 $4·{10}^{--\mathrm{1个}}$。用X射线断层扫描对压实织物的介观孔空间进行成像，然后进行分析，以基于通道几何结构提出渗透率预测，这与实验结果非常吻合。渗透率由介观通道中的粘性流控制。结果，如果毛细管数超过阈值，则通过进行不饱和测量，忽略微流动和毛细管效应，可以相当精确地测量这些双尺度织物中的渗透率。