GW4D20轿车柴油机微粒捕集器内部气流运动分析  

Internal Flow Motion Analysis of DPF for GW4D20 Car

作　　者：秦岩[1] 李君[1] 刘宇[1] 屈伟[2] 王庆党[2] 吴超[2] 

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,吉林长春130022 [2]长城汽车股份有限公司,河北保定071000

出　　处：《车用发动机》2013年第2期40-43,共4页Vehicle Engine

摘　　要：利用AVL Fire三维仿真软件研究了DPF载体内部气流运动规律,同时研究了发动机稳态工况、DPF入口扩张管锥角、载体长宽比以及载体前端氧化催化转换器(DOC)对流动均匀性的影响。结果表明:发动机稳态工况对DPF流动均匀性基本无影响;随着入口扩张管锥角减小,DPF流动均匀性逐渐改善;当载体长宽比为1左右时,DPF流动均匀性达到最佳;载体前端的DOC很大程度上改善了DPF的流动均匀性。The internal flow motion of DPF substrate was researched with AVL FIRE 3D simulation software and the influ- ences of engine steady-state condition, entrance expansion tube cone angle, substrate length-width ratio and oxidation catalytic converter（DOC）on flow uniformity were studied. The results show that the engine steady-state condition has little influence on DPF flow uniformity. With the decrease of entrance expansion pipe cone angle, the DPF flow uniformity improves. When the substrate length-width ratio is about 1, the DPF flow uniformity is optimal. The DOC in the front of DPF largely improves the flow uniformity.

关 键 词：柴油机 微粒捕集器 流动分布 均匀性 仿真 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]