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.
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)
