内燃机工程2026，Vol.47Issue(3)：29-39,11.DOI:10.13949/j.cnki.nrjgc.2026.03.004
引燃燃料理化特性对氨发动机燃烧过程影响的光学诊断
Optical Diagnostic on the Effects of Physicochemical Characteristics of Ignition Fuel on the Combustion Process in Ammonia Engines
摘要
Abstract
To address the problem of the poor inherent combustion characteristics of ammonia fuel,experimental fuels with different physicochemical characteristics were prepared using conventional highly active fuel-coal-to-liquid and fossil diesel,and the effects of the physicochemical characteristics of ignition fuel on the combustion characteristics in ammonia engines were deeply investigated.The results show that an appropriate increase in the cetane number of the ignition fuel is beneficial to the improvement of the mixture activity distribution in the cylinder,however,too high a cetane number will lead to insufficient premixed combustion,and the ignition effect will be weakened instead.Using high volatility fuel to ignite ammonia can mitigate the negative effects of increased ammonia ratio on the combustion process.Specifically,when the ammonia ratio increases from 50％to 70％,and ammonia is ignited by a fuel with a cetane number of 68.7(I77,prepared by mixing 77％indirect coal-to-liquids diesel with 23％-35 ℃ civil fossil diesel according to volume ratio)and a fuel with a 50％distillation temperature(T50)of 206.5 ℃(direct coal-to-liquids,DCTL),the indicated mean effective pressure(IMEP)only decreases by 7.46％and 3.58％,respectively.Notably,both ignition fuels can improve the ammonia combustion process,and the improvement effect is more significant at high ammonia ratios.Optical test results show that,at the 70％ammonia ratio,when ammonia is ignited by a fuel with a cetane number of 68.7(I77)and a fuel with a 50％distillation temperature of 206.5 ℃(DCTL),the combustion flame can still propagate to the central area of the combustion chamber.Overall,compared with fuel volatility,adjusting the cetane number has a significant optimization effect on the combustion ammonia process.Therefore,in the design of ignition fuel,priority should be given to adjusting the cetane number of the ignition fuel,followed by fine-tuning in combination with volatility.关键词
氨燃烧/引燃燃料理化特性/燃烧特征参数/火焰发展历程/光学诊断Key words
ammonia combustion/physicochemical characteristics of ignition fuel/combustion characteristic parameter/flame development history/optical diagnostic分类
能源科技引用本文复制引用
王潇楠,孙万臣,张浩,郭亮,郭延安,马晓玉..引燃燃料理化特性对氨发动机燃烧过程影响的光学诊断[J].内燃机工程,2026,47(3):29-39,11.基金项目
国家自然科学基金项目(52576118)National Natural Science Foundation of China(52576118) （52576118）
