Fibrous filter media is usually subjected to compression in practice. However, the effect of compression on the pore structure, flow field and filtration performance of heterogeneous compressed filter media has not been studied well. In this work, the filtration performance of two fibrous filter media with different compressions was investigated by experiments, classical single fiber efficiency theory and simulations. Artificial 3-D structures were established via GeoDict software based on the parameters of real uncompressed fibrous filter media. There was good agreement between the experimental and simulated results. For compressed filter media, it was found that the equivalent fiber diameter increased with increasing compression ratio. After compression, a shift in the pore size distribution and an increase in the channel tortuosity can be observed. The filtration performance varies for different compressed filter media. In addition, the filtration efficiency decreases as the angle between the fibers and the X-Y plane increases. There is a decrease in the penetration for structures with a broader fiber size distribution. Not only the real fiber size distribution and orientation but also the variation in fiber diameters with compression should be considered when predicting or calculating the performance of compressed filter media.

在实践中，纤维过滤介质通常受到压缩。然而，压缩对异质压缩过滤介质的孔隙结构、流场和过滤性能的影响尚未得到很好的研究。在这项工作中，通过实验、经典的单纤维效率理论和模拟研究了两种不同压缩率的纤维过滤介质的过滤性能。基于真实未压缩纤维过滤介质的参数，通过 GeoDict 软件建立了人工 3-D 结构。实验结果和模拟结果有很好的一致性。对于压缩过滤介质，发现当量纤维直径随着压缩比的增加而增加。压缩后，可以观察到孔径分布的变化和通道曲折度的增加。过滤性能因不同的压缩过滤介质而异。此外，过滤效率随着纤维与 XY 平面之间夹角的增加而降低。具有较宽纤维尺寸分布的结构的穿透力下降。在预测或计算压缩过滤介质的性能时，不仅要考虑实际的纤维尺寸分布和取向，还要考虑纤维直径随压缩的变化。具有较宽纤维尺寸分布的结构的穿透力下降。在预测或计算压缩过滤介质的性能时，不仅要考虑实际的纤维尺寸分布和取向，还要考虑纤维直径随压缩的变化。具有较宽纤维尺寸分布的结构的穿透力下降。在预测或计算压缩过滤介质的性能时，不仅要考虑实际的纤维尺寸分布和取向，还要考虑纤维直径随压缩的变化。