多次喷油策略下喷油间隔对双对置发动机性能和排放的数值分析  

Numerical Investigation of the Effects of Injection Interval of Split Injection Strategies on Combustion and Emission in an Opposed-Piston,Opposed-Cylinder(OPOC)Two-Stroke Diesel Engine

作　　者：张磊[1] 苏铁熊[1,2] 冯云鹏[3] 马富康[2] 张艳岗[2] 王子 

机构地区：[1]中北大学机电工程学院,山西太原030051 [2]中北大学能源动力学院,山西太原030051 [3]北京特种车辆研究所,北京100072 [4]中国北方发动机研究所,山西大同037000

出　　处：《测试技术学报》2018年第1期20-25,共6页Journal of Test and Measurement Technology

基　　金：国家自然科学基金资助项目(51605447);2016年山西省博士创新资助项目(2016BY129)

摘　　要：为研究多次喷油策略下喷油间隔对对置活塞对置气缸二冲程(OPOC)柴油机性能的影响,针对预喷量不变耦合不同喷油间隔条件下OPOC二冲程柴油机燃烧过程进行数值仿真研究.研究喷油间隔对OPOC二冲程柴油机燃烧过程的影响以及OPOC二冲程柴油机性能的影响.结果表明:小喷油间隔可以促进OPOC缸内油气混合;随着喷油间隔的增加,OPOC二冲程柴油机缸内平均压力增大,平均温度升高,soot排放呈现先减小后增加的趋势,而NOx排放呈现先增大后减小的趋势.In order to study the effect of injection interval of multiple split injection strategies on the performance of the OPOC two-stroke diesel engine,the combustion and emission characteristics of the OPOC engine are investigated by experimental and numerical simulation under different injection interval.The influence of injection interval on combustion process was investigated by analyzing thermalpower conversion efficiency in the engine.The results show that the small injection interval has strengthened the fuel-air mixing of the main injection fuel.With injection interval increasing,both the mean incylinder pressure of OPOC two-stroke diesel engine and the mean incylinder temperature raises.In the same time,the emissions of soot first decrease and then increase,while the trendy of the nitrogen oxides（NO_x）emissions is opposite with the soot.

关 键 词：对置活塞对置气缸二冲程柴油机 多次喷油策略 喷油间隔 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]