柴油喷射策略对氨柴油双燃料发动机性能的影响研究  

Study on effect of diesel injection strategy on performance of ammonia-diesel dual-fuel engine

作　　者：陈旭 缪雪龙 郑金保 狄亚格 赵志锋 郭立新[2] CHEN Xu;MIAO Xuelong;ZHENG Jinbao;DI Yage;ZHAO Zhifeng;GUO Lixin(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Wuxi Fuel Injection Equipment Research Institute,Wuxi 214063,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201620 [2]无锡油泵油嘴研究所,江苏无锡214063

出　　处：《上海工程技术大学学报》2024年第4期355-362,共8页Journal of Shanghai University of Engineering Science

摘　　要：基于某重型柴油机,利用CONVERGE软件研究不同氨能量占比(AER)及柴油喷射策略对氨柴油双燃料发动机燃烧性能的影响,通过调整柴油喷射策略来实现发动机指示热效率的最佳值。研究表明,氨能量占比从0%增至80%,指示热效率随之下降,反应产物N_(2)O的增加导致温室气体排放大于原柴油机的柴油燃烧模式。氨能量占比恒定为50%,在柴油单次喷射正时最佳点,指示热效率可与原柴油燃烧模式相当,同时温室气体(greenhouse gas,GHG)排放量下降19.7%,NO排放量上升41.6%。在柴油二次喷射的预、主喷正时最佳点,相对于原柴油燃烧模式,指示热效率上升1.6%,GHG排放量下降40.4%,NO排放量上升31.8%,延迟柴油二次喷射的主喷正时可有效降低NO排放量。Based on a heavy-duty diesel engine,the effects of different ammonia energy ratio(AER)and diesel injection strategies on the combustion performance of ammonia-diesel dual-fuel engine were investigated by using CONVERGE software,the indicated thermal efficiency(ITE)of the engine was optimized by adjusting the diesel injection strategy.The results of the study show that the AER increases from 0%to 80%with a consequent decrease in the ITE,the increase in the reaction product N_(2)O resulted in greater greenhouse gas(GHG)emissions than in the original diesel-only combustion mode of the diesel engine.The AER is constant at 50%.At the optimum point of diesel single injection timing,the ITE is comparable to that of the original diesel combustion mode,while GHG emissions decreases by 19.7%and NO emissions increases by 41.6%.At the optimum point of pre-and main injection timing for diesel split injection,the ITE increases by 1.6%,GHG emission decreases by 40.4%,and NO emission increased by 31.8%compared with the original diesel combustion mode,delaying the main injection timing of diesel split injection can effectively reduce NO emissions.

关 键 词：氨柴油双燃料发动机 氨能量占比 柴油喷射策略 温室气体 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]