柴油机微粒捕集器中微粒物分布特性研究  

Research on Distribution of Particulates Filter in Diesel Engine

作　　者：侯献军[1,2] 张新[1,2] 杜松泽[1,2] 李孟孟[1,2] 许京[1,2] 

机构地区：[1]现代汽车零部件技术湖北省重点实验室(武汉理工大学),武汉430070 [2]汽车零部件技术湖北省协同创新中心,武汉430070

出　　处：《汽车科技》2015年第5期9-13,共5页Auto Sci-Tech

基　　金：湖北省自然科学基金重点项目(2013CFA104)资助

摘　　要：为分析微粒在柴油机微粒捕集器中的分布特性,建立微粒捕集器内部过滤体微元通道模型,利用STAR-CCM+软件对简化后的模型进行仿真分析。得出微元通道内微粒物的浓度及压力场分布,根据进口和出口端面上的平均微粒物浓度可以求解过滤通道的捕集效率,根据进口和出口端面的平均压力可以求解微元通道的背压。并研究进出口孔穴形状及孔隙率对通道背压和捕集效率的影响。结果表明,正方形孔穴比正八边形孔穴的捕集效率和背压综合性能指标更佳;随着过滤层孔隙率的增加,捕集效率和背压均有所下降。The paper sets up the micro channel geometry model of the filter body in diesel particulate filter, using STAR-CCM ＋ software for simplified model simulation analysis. It is concluded that the concentration of the particles and the pressure field distribution in the micro channel. The capture efficiency of filtering channel can be solved according to the average concentration of particles on the import and export. The back pressure of micro channel can be required according to the average pressure of the import and export. Then the paper studies the influence of import and export cavity shape and porosity on the efficiency of the channel back pressure and capture efficiency. The results show that the square cavity is better than octagon cavity, concluding capture efficiency and back pressure comprehensive performance. The capture efficiency and back pressure were decreased with the increase of the porosity of filter layer.

关 键 词：微粒捕集器 过滤体 微元通道 捕集效率 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]