大缸径船用柴油机部分预混压燃的试验研究  

Experiment Investigate of Partially Premixed Compress Ignition Combustion of Marine Diesel Engine

作　　者：张文正 黄震[1] 冯明志 闫萍 刘瑞 吕兴才[1] ZHANG Wenzheng;HUANG Zhen;FENG Mingzhi;YAN Ping;LIU Rui;Lü Xingcai(Ministry Key Laboratory of Power Machinery and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;Shanghai Marine Diesel Engine Research Institute, Shanghai 201108, China)

机构地区：[1]上海交通大学动力机械与工程教育部重点实验室,上海200240 [2]中国船舶集团有限公司第七一一研究所,上海201108

出　　处：《内燃机工程》2020年第6期11-18,共8页Chinese Internal Combustion Engine Engineering

基　　金：基础产品创新科研资助项目。

摘　　要：以某中速船用柴油机为研究对象,试验研究了基于二次喷射技术对船用柴油机性能和燃烧特性的影响。结果表明,基于二次喷射技术可以实现大缸径船用柴油机部分预混压燃(partially premixed compress ignition,PPCI)燃烧模式,二次喷射的预喷正时、预喷油量及燃油喷射压力对PPCI燃烧过程有明显影响。通过二次喷射策略在单缸机开展试验研究,确定了适用于大缸径船机的PPCI燃烧的燃油喷射控制策略:在平均有效压力(break mean effective pressure,BMEP)为0.3 MPa时,采用105 MPa喷射压力、上止点前20°预喷时刻和20%预喷油量,在BMEP为0.6 MPa时,选择120 MPa喷射压力、上止点前35°预喷时刻和28%预喷油量的喷油策略,可以实现较为理想的PPCI燃烧,燃油消耗率可改善3.1%~6.2%,碳烟排放降低51%~62%,压升率降低58%~70%。Based on a medium-speed marine diesel engine,an experimental study was carried out to investigate the influence of two-stage injection on the engine performance and combustion characteristics.The test results show that,for a large marine diesel engine,the partially premixed compress ignition(PPCI)can be realized by two-stage injection at part load.And the key factors affecting PPCI are pilot injection timing,pilot injection quantity and two-stage injection pressure.By an experimental study on two-stage injection conducted on the single-cylinder engine of the medium-speed marine diesel engine,a refined strategy of two-stage injection for the PPCI combustion of the large marine engine was determined.When the break mean effective pressure(BMEP)is required to be 0.3 MPa,the injection pressure of the two-stage injection should be 105 MPa,the pilot injection timing 20 degrees in crank angle before top dead center,and the pilot injection quantity 20%of the total.When BMEP is required to be 0.6 MPa,the injection pressure of the two-stage injection should be 120 MPa,the pilot injection timing 35 degrees in crank angle before top dead center,and the pilot injection quantity 28%of the total.The profit from the PPCI combustion is that the break specific fuel consumption can be reduced by 3.1%~6.2%,the soot emissions can be reduced by 51%~62%,and the rate of pressure raise can be reduced by 58%~70%.

关 键 词：二次喷射 部分预混压燃 柴油机 燃烧 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]