DPF中碳烟氧化再生的单通道仿真  

Single channel simulation of soot oxidation regeneration in DPF

作　　者：郭冠伦[1,2] 虞敬 方乐 王文辉[1,2] GUO Guanlun;YU Jing;FANG Le;WANG Wenhui(Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,China;Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan University of Technology,Wuhan 430070,China)

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

出　　处：《华中科技大学学报（自然科学版）》2022年第1期50-55,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：高等学校学科创新引智计划资助项目(B17034);教育部创新团队发展计划资助项目(IRT_17R83)。

摘　　要：以La_(0.7)Sr_(0.3)CoO_(3)钙钛矿催化剂氧化碳烟实验为基础,使用COMSOL Multiphysics软件建立二维DPF单通道模型,并进行合理的假设和简化.结合实验进行模型验证,分析了进气流速和进气温度对碳烟氧化的影响,得出以下结论:当进气流速为1.5 m/s,入口温度为881 K时,柴油机微粒过滤器(DPF)通道内温度达到峰值,为1010 K.进气流速和进气温度都会影响碳烟的沉积和反应的进行.进气流速增大,碳烟的氧化反应减慢,碳烟的沉积加剧;进气温度增大,碳烟的氧化反应加快,碳烟的沉积减少,氧化碳烟的起燃时间缩短.Based on the experiment of soot oxidation with La_(0.7)Sr_(0.3)CoO_(3)perovskite catalyst,a two-dimensional diesel particulate filter(DPF)single channel model was established by using COMSOL Multiphysics software,and the experimental model was assumed and simplified reasonably.The effects of inlet flow rate and inlet temperature on soot oxidation were analyzed,and the model verification was carried out.It is concluded that when the inlet flow rate is 1.5 m/s and the inlet temperature is 881 K,the temperature in the DPF channel reaches a peak of 1010 K.Both inlet flow rate and inlet temperature would affect soot deposition and reaction.With the increase of inlet flow rate,soot oxidation slows down and soot deposition is intensified.With the increase of inlet temperature,the oxidation reaction of soot is accelerated,the deposition of soot is reduced,and the ignition time of soot is shortened.

关 键 词：柴油机微粒过滤器 单通道模型 进气流速 进气温度 碳烟分布 模型优化 

分 类 号：TQ426.83[化学工程]