同济大学学报（自然科学版）2013，Vol.41Issue(6)：920-925,6.DOI:10.3969/j.issn.0253-374x.2013.06.020
纤维过滤介质在容尘阶段的非稳态过滤效率
Dynamic Filtration Efficiency of Particle-loaded Fibrous Media During Dust Loading Period
林忠平 1吴昌甫 1陆涛 1夏建伟1
作者信息
- 1. 同济大学机械与能源工程学院,上海201804
- 折叠
摘要
Abstract
A nonlinear differential equation for aerosol concentration distribution of the particle-loaded porous fibrous media was established based on the transport equation,N-S equation in the applications for Newton viscous fluid.The general governing equation for aerosol concentration with the packing density of the particle-loaded porous fibrous media was calculated by the mass deposition of dust or aerosol particle.In addition,laboratory experiments were carried out to study the close correlation among the classical dimensionless parameters and their influence on the filtration efficiency of particle-loaded fibers.The empirical formulas about the dynamic filtration efficiency were developed through nonlinear regression.The experimental results show that the air flow lies in the Stokes region and in the laminar flow as the Reynolds number is less than 1.The calculated interception parameter was between 0.086 and 0.559.However,the fitted empirical formulas about the dynamic filtration efficiency can only apply to the case where Stokes number is less than 1.关键词
纤维介质/非稳态过滤/粒子浓度分布微分方程/积尘填充率/经验公式Key words
fibrous media/ dynamic filtration/ differential equation for aerosol concentration distribution/ particle-loaded packing density/ empirical formula分类
建筑与水利引用本文复制引用
林忠平,吴昌甫,陆涛,夏建伟..纤维过滤介质在容尘阶段的非稳态过滤效率[J].同济大学学报（自然科学版）,2013,41(6):920-925,6.
