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
Key words
power machinery engineering/blended fuel/internal combustion Rankine cycle/thermal efficiency/emission characteristics
维普
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