中国舰船研究2024，Vol.19Issue(4)：131-138,8.DOI:10.19693/j.issn.1673-3185.03764
船用微引燃甲醇发动机喷油器参数对燃烧和排放特性的影响
Effects of injector parameters on combustion and emission characteristics of marine micro-ignition methanol engine
摘要
Abstract
[Objective]To improve the combustion,performance and emissions of high-power marine en-gines,diesel fuel micro-injection with methanol ignition is adopted to study the in-cylinder combustion and emission characteristics.[Methods]A three-dimensional simulation model of a diesel micro-injection pilot-ignition methanol engine is established on the basis of an ACD320 high-power marine medium-speed diesel engine in order to study the effects of injector parameters(nozzle number and methanol spray angle γ)on the combustion performance and emission characteristics of a marine large-bore methanol engine.[Results]With the increase in the number of nozzle,the in-cylinder methanol atomization improves and the in-cylinder work mass mixing becomes more adequate,leading to the advancement of CA50 and the shortening of the combus-tion duration.While this yields higher indicated thermal efficiency(ITE)and a better equivalent indicated spe-cific fuel consumption(EISFC),as well as contributing to the reduction of soot emissions,it also causes the el-evation of NOx emissions.Moreover,as the methanol spray angle increases,the ITE increases,obtaining bet-ter fuel economy and lower soot emissions.With the optimal methanol spray angle(γ=60°),the methanol spray is located in front of the diesel spray injection point,the flame propagation speed in the cylinder is faster,the indicated thermal efficiency is at its maximum and the fuel combustion is fuller,thereby obtaining the low-est soot emissions and most optimal EISFC.[Conclusion]The results of this analysis can provide a theoret-ical basis for engine injector parameters.关键词
甲醇/微喷引燃/缸内直喷/甲醇喷雾夹角/排放Key words
methanol/micro-jet ignition/direct injection/methanol spray angle/emission分类
交通工程引用本文复制引用
吴德杨,温华兵,徐昌春,李敬瑞,沈建华,靖海国..船用微引燃甲醇发动机喷油器参数对燃烧和排放特性的影响[J].中国舰船研究,2024,19(4):131-138,8.基金项目
江苏省工业和信息化厅关键核心技术攻关项目资助(2145072206) （2145072206）
