微粒捕集器炭烟加载和再生特性仿真分析

摘要

利用AVLFire三维仿真软件建立GW4D20轿车柴油机微粒捕集器（DPF）模型，对DPF炭烟加载过程以及DPF再生过程的炭烟燃烧情况和载体温度分布进行了仿真计算，经过理论和仿真分析得出：在载体内部炭烟加载顺序为从后向前堆积，壁面中的积累顺序是从壁面内部向炭烟层本身堆积；DPF再生过程中炭烟的氧化顺序则是从前向后，且温度峰值从前至后依次增大，最大温度点的位置是靠近载体出口的中心位置。%The model of diesel particulate filter (DPF) for GW4D20 car was built with the three-dimensional simulation soft-ware AVLFire .With the model ,the soot combustion and carrier temperature distribution during the soot loading and regenera-tion process were simulated .The theoretical analysis and simulation results show that the soot stacks sequentially from back to front inside the carrier and from inside to the soot layer in the wall .In the regeneration process of DPF ,the soot oxidizes from front to back ,the peak temperature increases from front to back and its location is near the center of carrier outlet .