车用柴油机微粒捕集器热再生的一维数值模拟  

One-Dimensional Numerical Simulation for the Thermal Regeneration of Vehicle Diesel Particulate Filter

作　　者：龚金科[1] 梅本付[1] 王劲[1] 鄂加强[1] 袁文华[1] 

机构地区：[1]湖南大学机械与汽车工程学院,湖南长沙410082

出　　处：《车用发动机》2005年第5期45-47,60,共4页Vehicle Engine

摘　　要：以壁流式蜂窝陶瓷微粒捕集器(DPF)为研究对象,建立了DPF一维热再生过程的数学模型。对陶瓷孔道内微粒(PM)的燃烧过程及其温度分布进行了模拟,结果表明,再生过程进行到一半时,DPF载体的温度达到最大值。设计时必须保证在此温度下DPF的载体壁面不会发生破裂,以免影响其正常工作。A one-dimensional mathematic model depicting thermal regeneration process of diesel particulate filter was built up with the wall-flow ceramic honeycomb diesel particulate filter as investigation subject. The soot combustion process and its temperature distribution were simulated, the numerical results agreed well with the experimental data. The results indicated that when regeneration process achieved half of its whole process, the filter temperature had reached its maximum value. We should keep the filter wall not to crack at this temperature when designing the DPF.

关 键 词：微粒捕集器 再生 数值模型 一维数值模拟 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]