船用氨燃料低速机缸内燃烧的数值模拟研究  

Simulation Research on the Combustion of Marine Low-Speed Ammonia Engine

作　　者：崔磊 王怀印 CUI Lei;WANG Huaiyin(China Shipbuilding Power Engineering Institute CO.,Ltd,Shanghai 201206,China;School of Mechanical Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]中船动力研究院有限公司,上海201206 [2]天津大学机械工程学院,天津300072

出　　处：《工程热物理学报》2023年第11期3151-3159,共9页Journal of Engineering Thermophysics

基　　金：上海市“科技支撑碳达峰碳中和专项(第一批)”项目(No.21DZ1208102);天津大学内燃机燃烧学国家重点实验室2022年度开放课题(No.K2022-04)。

摘　　要：针对一台520 mm缸径船用低速机进行三维全尺寸模拟,对比分析了氨/柴油两种运行模式不同喷油器方案对发动机燃烧排放的影响。结果表明:在爆发压力限值内,采用合适的氨燃料喷射策略可以实现同工况下与柴油机相当的功率水平;采用“2+2”喷油器方案对柴油模式的燃烧过程影响显著,功率相比原机有下降(<10%);当前“2+2”喷油器方案下,各负荷氨气模式可以达到原机柴油模式功率水平,但NOx排放与气耗均略高于“3+3”模式。Based on a marine low-speed engine with 520 mm bore,the impact of different injector layout schemes was compared and analyzed by three-dimensional full-size combustion calculation.The results show that the appropriate ammonia fuel injection strategy can achieve the same power level as original diesel engine under the same engine loads within the maximum pressure limit.The“2+2”injector scheme has a significant effect on the combustion process of diesel mode,and the power is decreased(<10%)compared with the original diesel engine.Under“2+2”injector scheme,the power level of the ammonia mode can reach the original diesel mode,but NOx emission and gas consumption are slightly higher than that of the“3+3”mode.

关 键 词：船用低速机 氨燃料 燃烧排放 数值模拟 

分 类 号：TK46[动力工程及工程热物理—动力机械及工程]