Investigation on Filtration Performance by Different Arrangement Schemes in Glass Fibrous Air Filter

摘要

In order to study the influence of gradient along media thickness and the number of row,on filtration performance,Lattice Boltzmann Method (LBM) is used for two-phase flow study.With the same number of row and the identical solid fraction value,scheme one,i.e.small fibers are positioned upstream with large fibers downstream,and scheme two,i.e.large fibers are positioned upstream with small fibers downstream,are compared.Results show that the filtration efficiency of scheme one is higher than that of scheme two,and the largest deviation between these two schemes can reach 17 ％ for particles with diameter between 0.10 and 0.90 μm.With the increase of line gap distance,the filtration efficiency can be increased by more than 50 ％.