内燃兰金循环氨氢发动机热力学特征参数的模拟与分析  

Simulation and Analysis of Thermodynamic Characteristic Parameters of Internal Combustion Rankine Cycle Ammonia Hydrogen Blended Fuel Engine

作　　者：张冠宇 于洋 田径[2] 吴志军[1] ZHANG Guanyu;YU Yang;TIAN Jing;WU Zhijun(School of Automotive Studies,Tongji University,Shanghai 201804,China;College of Automotive Engineering,Jilin University,Changchun 130022,China)

机构地区：[1]同济大学汽车学院,上海201804 [2]吉林大学汽车工程学院,吉林长春130022

出　　处：《同济大学学报（自然科学版）》2024年第10期1619-1630,共12页Journal of Tongji University:Natural Science

摘　　要：为实现氨氢燃料在内燃机上的应用,基于Cantera平台建立了氨氢燃料内燃兰金循环模型,进行了不同氨氢掺混比例、过量空气系数和喷水量等条件下内燃兰金循环氨氢燃料发动机燃烧过程数值模拟,从热力学循环效率和典型污染物排放两方面分析和评价不同边界条件对燃烧特性的影响。结果表明:过量空气系数和缸内喷水量增加分别提升热力学循环效率2.66%和7.00%,喷水的作用效果更显著;氨氢燃料燃烧终了排放污染物NOx主要以NO为主;缸内喷水有利于氨氢发动机氮氧化物排放量降低,应用喷水技术后,燃烧产物中NO和NO2的排放体积分数降低幅度达到37%。To realize the application of NH3/H2 blended fuel in internal combustion engines,an internal combustion Rankine cycle model of NH3/H2 blended fuel was established in this paper based on Cantera.Additionally,the numerical simulation of combustion process of internal combustion Rankine cycle NH3/H2 blended fuel engine under the conditions of different ammonia hydrogen mixing ratios,excess air ratios,and water spray volumes was conducted.Finally,the influence of different boundary conditions on combustion characteristics was analyzed from the perspectives of thermodynamic cycle efficiency and typical pollutant emissions.The results show that the increase of excess air ratio and in cylinder water spray volume improve the thermodynamic cycle efficiency by 2.66%and 7.00%respectively,hence the effect of water spray is more significant.Besides,NO is the main NOx pollutant emitted at the end of fuel combustion.Water spray in the cylinder is beneficial to the reduction of NOx emissions.After the application of the water spray technology,the emission of NO and NO2 in combustion products is reduced by 37%.

关 键 词：动力机械工程 复合燃料 内燃兰金循环 热效率 排放特性 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]