GW4D20轿车柴油机颗粒物捕集器压降特性仿真分析  

Simulation Analysis of the Influence Factors to GW4D20 Car Diesel Particulate Filter Pressure Drop

作　　者：秦岩[1] 刘宇[1] 高定伟[2] 段景辉[2] 张鹏[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

出　　处：《小型内燃机与摩托车》2013年第3期31-35,共5页Small Internal Combustion Engine and Motorcycle

摘　　要：本研究用三维CFD软件AVL FIRE对GW4D20轿车柴油机微粒捕集器(DPF)的压降特性进行分析。研究因素为:发动机稳态工况的排气温度和排气流量、载体目数、载体壁厚、初始碳烟加载量对DPF载体压降的影响。得出:在发动机稳态工况下,随着排气质量流量和温度的增加,DPF的压降水平随之增加,DPF的压降增长速率随着温度的增长呈现先增大后减小的趋势;当DPF载体的目数和壁厚增加时,DPF压降逐渐增加;随着初始碳烟加载量的增加,DPF的压降逐渐增加,碳烟在DPF载体中的积累所带来的压降损失是DPF压降形成的主要因素。In this paper, we analyze the pressure drop characteristics of GW4D20 car diesel particulate filter （DPF） by using the three dimensional CFD software AVL FIRE. The factors are ： exhaust gas temperature and exhaust flow under engine steady state condition, substrate cells, substrate wall thickness, initial soot loading in substrate. The results are as follows： In the engine steady state conditions, with exhaust mass flow rate and temperature increase, the level of DPF pressure drop increases, the growth rate of the DPF pressure drop with temperature growing first increases, then decreases; When the DPF substrate cells and wall thickness increa- ses, the DPF pressure drop increases gradually; With the initial soot loading increases, the DPF pressure drop increases gradually. The pressure loss owing to soot accumulation in the DPF substrate is the main factor of DPF pressure drop.

关 键 词：DPF 压降 影响因素 仿真模拟 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]