含水DPF压降特性的试验研究  

Experimental Research on the Pressure Drop Characteristic of DPF Under Moisture Condition

作　　者：孟忠伟[1] 李路[1] 陈鹏 闫妍[1] 韩伟强[1] 

机构地区：[1]西华大学交通与汽车工程学院汽车测控与安全四川省重点实验室,成都610039 [2]凯龙高科技股份有限公司,无锡214177

出　　处：《内燃机工程》2015年第3期68-71,共4页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金资助项目(51106130);四川省教育厅青年基金项目(12ZB138);四川省教育厅科技创新团队项目(KYTD201003);西华大学重点科研基金项目(Z1120320;Z1120319);发动机燃料电控系统及尾气后处理系统产业集群项目(成都市八大产业化工程项目);西华大学研究生创新基金项目(ycjj2014155)

摘　　要：基于外加热源再生性能测试台架，研究了柴油机颗粒捕集器（dieselparticulatefilter，DPF）含水时运行参数和孔隙结构参数对其压降特性的影响规律。试验结果表明：含水DPF的压降随着含水率的降低均呈保持稳定、迅速降低、缓慢降低三阶段变化，存在压降敏感区域。在含水率较高时，含水率随着时间的增长而迅速降低，此后含水率随着时间增长线性降低。随着来流流量和来流温度的增加，压降敏感区域保持不变，含水率分布在23％～35％。随着载体孔隙率和微孔孔径的增大，压降敏感区域变窄，含水率分布在26％～35％。The influence of inlet conditions and pore structure parameters on pressure drop of DPF under moisture condition was investigated on a DPF regeneration testing bench with an additional heating source. The experimental results show that with the decrease of water content, the pressure drop of DPF appears to be three stages keeping constantly firstly, decreasing rapidly and then decreasing slowly, and there exists a sensitive area of pressure drop. Under the condition of high water content, the the water content decreases rapidly at first and then decreases lineally. With the increases of the flow and temperature of incoming mass, the sensitive area of the water content keeps constant with water content of 23% to 35%. With the increases of porosity and pore size of DPF substrate, the sensitive area becomes narrow with water content of 26% to 35 %.

关 键 词：内燃机 柴油机颗粒捕集器 压降 含水率 敏感区域 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]