催化型微粒捕集器的再生与压降数值研究  

A numerical study on regeneration and pressure drop of catalytic particulate filter

作　　者：龚金科[1] 龙罡[1] 蔡皓[1] 吴钢[1] 余明果[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082

出　　处：《环境工程学报》2011年第12期2820-2824,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(50876027);湖南省自然科学基金资助项目(10JJ6080);湖南大学汽车车身先进设计制造国家重点实验室自主课题(61075002)

摘　　要：采用新的再生机理对催化型微粒捕集器(CPF)深床捕集微粒的氧化再生过程进行了建模,并将微粒捕集器中的压降分成5个部分分别计算,对其压降特性进行了数值研究。结果表明,新模型对深床捕集微粒的氧化再生计算与实验值吻合良好,比原模型更能反映微粒沉积的实际过程,深床捕集微粒的压降计算值也更精确。在排气流量大、温度高的工况下,深床捕集微粒的压降先迅速增大再减小的现象明显。研究结果能为工程应用提供验证手段,为CPF的优化设计提供依据。Based on the new regenerating mechanism of deep-bed trapped soot, the mathematical model of regeneration process in catalytic particulate filter（CPF） was proposed. The total pressure drop of CPF was divid- ed into 5 parts,and the characteristic of each was studied numerically. The result indicated that the computed value of new regenerating model had good agreement with experimental data, it showed the actual soot trap process. In the case of high exhaust flow rate and high exhaust temperature, the pressure drop of deep-bed trapped soot increased rapidly and then decreased to a certain value. The study has the reference to verify the en- gineering applications and provides guidance for the optimal design of CPF.

关 键 词：微粒捕集器 催化再生 压降 深床 滤饼 

分 类 号：X513[环境科学与工程—环境工程]