来流参数对DPF热再生过程的影响  

Influence of Incoming Flow Conditions on DPF Thermal Regeneration

作　　者：唐君实[1] 宋蔷[1] 徐小波[1] 李水清[1] 姚强[1] 

机构地区：[1]清华大学热科学与动力工程教育部重点实验室,北京100084

出　　处：《燃烧科学与技术》2010年第3期225-229,共5页Journal of Combustion Science and Technology

基　　金：国家重点基础研究发展计划(973)资助项目(2002CB211600)

摘　　要：基于改进的DPF热再生数学模型,对DPF的再生过程进行了数值模拟.分别采用再生时间、最大壁面温度和最大壁面温度梯度、单位质量碳烟再生能耗来衡量再生的效率、安全性和经济性,研究了来流参数对再生效率、安全性和经济性的影响,研究结果表明:随来流质量流量增加,过滤体的再生时间存在最佳值,再生安全性增强,但能耗亦增加;随来流氧气浓度和温度的增加,过滤体的再生时间和能耗减小,但再生安全性降低;初始温度对再生时间和安全性影响不大,但随着初始温度增加,再生能耗降低.Based on the improved model for DPF thermal regeneration,numerical simulation was developed to study the influence of incoming flow conditions on efficiencys,afety and economy of regeneration.Regeneration time,maximum wall temperature,maximum wall temperature gradienta,nd energy consumption per unit mass soot were used to evaluate efficiencys,afety and economy of regeneration.The results show that regeneration safety and energy consumption increase with the increase of mass flow rate of incoming gasa,nd there exists an optimal regeneration time,regeneration times,afety and energy consumption all decrease with the increase of oxygen concentration and temperature of incoming flow,initial temperature has little influence on regeneration time and safety,and energy consumption decrease with the increase of initial temperature.

关 键 词：柴油机颗粒捕集器 热再生 来流参数 再生效率 安全性 经济性 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]