RP-3航空煤油压燃发动机分段喷射燃烧性能优化  

Combustion performance optimization of compression ignition engine using RP-3 aviation kerosene with split injection

作　　者：魏胜利[1] 孙林肖 于志清 吴李荣 WEI Shengli;SUN Linxiao;YU Zhiqing;WU Lirong(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu China;School of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013 [2]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《华中科技大学学报（自然科学版）》2023年第10期114-120,141,共8页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：江苏高校优势学科建设工程资助项目(苏政办发[2018]87号).

摘　　要：针对简化的包含92种组份、332步反应的RP-3航空煤油燃烧机理,进行了压燃发动机的缸内湍流燃烧数值模拟研究,探究了分段喷射策略对柴油机燃用RP-3航空煤油的燃烧性能的影响,得到了最佳的喷油质量分数与喷油正时.结果表明:预喷质量分数为5%的RP-3与预喷质量分数为2%的柴油的缸内压力保持较高的一致性;较晚的主喷时刻会导致油气混合时间较短,燃烧质量变差;预喷与主喷质量分数分别为10%和90%,预喷正时和主喷正时分别为-12°CA ATDC与0.5°CA ATDC (上止点后)的喷油策略能令RP-3在该型柴油机上发挥更好的燃烧性能.Numerical simulation of turbulent combustion in a compression ignition engine was carried out for a simplified mechanism of RP-3 aviation kerosene containing 92 species and 332 reactions.The effect of the split injection strategy on the combustion performance of diesel engines fuelled with RP-3 aviation kerosene was investigated,and the best injection quality fraction and timing were obtained.Results show that the in-cylinder pressure of the RP-3 with 5%pilot-injection quality fraction was consistent with that of diesel with 2%pilot-injection quality fraction.Later main injection timing would lead to shorter fuel-air mixing time and worse combustion quality.The injection strategy of pre injection/main injection quality fraction of 10%/90%and pre injection/main injection time of-12℃A ATDC/0.5℃A ATDC(after top dead center)could enable RP-3 to achieve better combustion performance on this type of diesel engine.

关 键 词：压燃式发动机 RP-3航空煤油 喷射策略 燃烧性能 柴油 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程] V312[航空宇航科学与技术—航空宇航推进理论与工程]