内燃机工程2025，Vol.46Issue(4)：55-63,9.DOI:10.13949/j.cnki.nrjgc.2025.04.007
喷油策略和缸内温度调控对大缸径氨柴发动机燃烧和排放的影响
Effects of Fuel Injection Strategy and In-Cylinder Temperature on Ammonia Diesel Dual Fuel Engines
摘要
Abstract
To improve the combustion efficiency and indicated thermal efficiency of ammonia diesel dual-fuel engines while reducing pollutant emissions,based on a large-bore marine engine,the 3D simulation software CONVERGE was used to analyze the combustion and emissions under different ammonia energy substitution ratios,different diesel injection timings and initial cylinder temperatures.The results show that with the gradual increase of ammonia energy substitution ratio and the increase of premixed combustion,the indicated thermal efficiency of the engine is improved,and the carbon emission is significantly reduced.However,the excessively high ammonia substitution ratio reduces the completion of combustion and the combustion efficiency,thereby decreasing the indicated thermal efficiency.When the diesel injection timing is appropriately advanced,the combustion efficiency is improved while the NH3 and CO emissions are reduced.Increasing the initial temperature in the cylinder improves the combustion environment,promotes the combustion rate of ammonia fuel,improves the indicated thermal efficiency of the engine,and significantly reduces N2O and unburned ammonia emissions.At an ammonia substitution ratio of 40%,a diesel injection timing of-21°,and an initial cylinder temperature of 338 K,the engine's indicated thermal efficiency reached the highest level of 51.37%,while the N2O and unburned ammonia emission levels were very low.关键词
氨柴双燃料/氨能量替代比/喷油正时/缸内初始温度/燃烧/排放Key words
ammonia diesel dual fuel/ammonia energy substitution ratio/injection timing/initial cylinder temperature/combustion/emission分类
能源科技引用本文复制引用
官维,吴杰,吴锋,王雷,娄华,何海斌,文涛..喷油策略和缸内温度调控对大缸径氨柴发动机燃烧和排放的影响[J].内燃机工程,2025,46(4):55-63,9.基金项目
宁波重点研发计划项目(2021Z036) （2021Z036）
广西重点研发计划项目(桂科AB25069503,AA23062070) （桂科AB25069503,AA23062070）
国家重点研发计划项目(2022YFE0209000) Ningbo Major Research and Development Plan Project(2021Z036) （2022YFE0209000）
Guangxi Major Research and Development Plan Project(AB25069503,AA23062070) （AB25069503,AA23062070）
National Key R&D Program of China(2022YFE0209000) （2022YFE0209000）
