柴油机低温燃烧数值模拟研究  

Numerical Simulation Study of Low Temperature Combustion Diesel Engine

作　　者：李雪飞[1] 肖合林[1] 

机构地区：[1]武汉理工大学汽车工程学院,湖北武汉430070

出　　处：《武汉理工大学学报（信息与管理工程版）》2014年第3期312-315,共4页Journal of Wuhan University of Technology：Information & Management Engineering

基　　金：教育部博士点科研基金资助项目(20020487022);国家重点基础研究发展规划基金资助项目(2001CB209207)

摘　　要：运用KIVA软件模拟分析了不同EGR率和喷油提前角对柴油机低温燃烧性能的影响,结果表明,增大EGR(exhaust gas recycling)率能够有效降低缸内燃烧温度,使NOx的排放降低,但随着EGR率的增大,柴油机Soot的排放会有一定的升高。晚喷能够更好地实现柴油机低温燃烧方式,使柴油机NOx和Soot排放同时降低,但喷油时刻过晚,NOx和Soot的排放会有一定的回升。The influences of different EGR rates and advanced injection angles on low temperature combustion performance of diesel engine were simulated and calculated .Results show that a high EGR rate will efficiently reduce combustion temperature in cylinder and lower NO x emission;but Soot emission of diesel engine will increase with the increase of EGR rate .Late injection can achieve better results to low temperature combustion diesel engine , thus reducing NO x emission and Soot emission at the same time.However, the Soot emission and NO x emission will rebound if fuel injection is too late .

关 键 词：柴油机 低温燃烧 数值模拟 

分 类 号：TK4[动力工程及工程热物理—动力机械及工程]