柴油机微粒捕集器再生过程和影响因素仿真研究

本资料包含pdf文件1个，下载需要1积分

柴油机微粒捕集器再生过程和影响因素仿真研究摘要：本文针对柴油机微粒捕集器的再生过程和影响因素进行了仿真研究〃立了DPF的仿真计算模型，分析了
DPF 再生期间的载体平均温度、载体最高温度、碳烟分布状况、氧气浓度分布状况等多种特性的变化规律。并探
讨了初始碳烟加载密度、排气含氧量、再生入口温度和加热温升速率对再生过程的影响规律，结果表明：初始碳
烟加载密度越大，再生过程中载体的最高温度越高；排气含氧量和再生入口温度越高，DPF 再生速度越快，载体
的最高温度也越高；在理想电加热方式下，再生入口温升速率越高，碳烟起燃时刻越早，但对载体最高温度没有
影响。
关键词：柴油机; 微粒捕集器; 再生过程; 仿真
中图分类号：TK421 .5

Simulation Research on Characteristics of Regeneration
of Diesel Particulate Filter

Gao Ying； Xu Zhe； Sun Wei； Li Jun
(State Key Laboratory of Automobile Dynamic Simulation， Jilin University， Changchun 130022， China)

Abstract: This paper presents the simulation research on the regeneration process ant its factors for
diesel particulate filter (DPF). The DPF is modeled with CFD software AVL FIRE. The mean
temperature， maximum temperature， soot distribution and oxygen content are analyzed during the
DPF regeneration. The effect of initial soot loading density， the oxygen content in inlet exhaust
gases， inlet gases temperature， inlet gases temperature ramping rate on regeneration process are
studied. The results show that larger initial soot loading density， higher maximum temperature of
DPF substrate during regeneration. The higher oxygen content of inlet exhaust gases and inlet gases
temperature， more rapid the regeneration process and higher maximum temperature of the DPF
substrate. With the ideal electric heat mode， higher inlet temperature ramping rate， the earlier soot
light-off time， however no effect on maximum temperature of the DPF substrate.
Key words: Diesel; Diesel particulate filter (DPF); Regeneration; Simulation