西华大学学报（自然科学版）2011，Vol.30Issue(1)：1-4,51,5.
柴油机颗粒捕集器内颗粒层不均匀分布的数值研究
Numerical Investigation into the Non-uniform Soot Layer Distribution in a Diesel Particle Filter
摘要
Abstract
A one-dimensional unsteady model simulating the trapping process of fine particles by wall-flow filter was developed to simulate the flow field and particle layer distribution in a channel.Numerical simulation was conducted to investigate the influence of non-uniform distributed wall permeability of the filter on the particle layer distribution and filter pressure drop.The results showed that the non-uniform distributed wall permeability of filter caused the non-uniform distribution of soot layer, the position with higher wall permeability led to higher soot layer thickness.With the same relative deviation of wall permeability in different filter length, the lower average wall permeability led to higher non-uniform soot layer distribution.The relative deviation of soot layer thickness decreased gradually with the loading time, because the filtration velocity of different position in channel was tended to uniform distribution with the loading time, and led to uniform increasing rate of soot layer thickness.However, the non-uniform distributed wall permeability had little influence on the pressure drop under the normal condition.关键词
壁流式/柴油机颗粒捕集器/壁面渗透系数/过滤压降Key words
wall flow/ diesel particle filter/ wall permeability coefficient/ pressure drop分类
能源科技引用本文复制引用
孟忠伟,宋蔷..柴油机颗粒捕集器内颗粒层不均匀分布的数值研究[J].西华大学学报（自然科学版）,2011,30(1):1-4,51,5.基金项目
国家"九七三"重点基础研究项目(2002CB211600) （2002CB211600）
四川省教育厅科技创新团队(KYTD201003) （KYTD201003）
四川省教育青年基金项目(10ZB078) （10ZB078）
