河北科技大学学报2025，Vol.46Issue(6)：694-703,10.DOI:10.7535/hbkd.2025yx06011
进气富氧比例对氨氢内燃机燃烧及排放性能的影响
Influence of intake oxygen enrichment ratio on combustion and emission performance of ammonia-hydrogen internal combustion engine
摘要
Abstract
In response to the problems of slow combustion speed,difficult ignition and high emissions of ammonia-hydrogen fuel in internal combustion engines,the combustion speed and stability of the ammonia-hydrogen mixture were improved by increasing the intake oxygen concentration.This approach enhanced the power performance and thermal efficiency of internal combustion engines while simultaneously reducing emissions.CONVERGE software was used to conduct combustion simulations on the ignition-type internal combustion engine model,maintaining the ammonia-hydrogen molar ratio at 85%and 15%,and gradually increasing the oxygen proportion from 21%to 29%.The results show that as the oxygen concentration increases,the indicated mean effective pressure of the engine gradually rises and presents a linear trend.The combustion stability of the in-cylinder mixture improves,and the combustion duration shortens.With the increase in oxygen concentration,the peak temperature in the cylinder also rises,leading to an increase in nitrogen oxides(NOx)emissions.The indicated thermal efficiency of the internal combustion engine exhibits a trend of initially increasing and then gradually decreasing as the oxygen concentration rises.The thermal efficiency of internal combustion engines peaks at 40.13%when the oxygen proportion(Ω)reaches 27%.The research provides a reference for the practical application of ammonia-fueled internal combustion engines.关键词
内燃机工程/火花点火/氨/氢/富氧燃烧Key words
internal combustion engine engineering/spark ignition/ammonia/hydrogen/oxygen-enriched combustion分类
能源科技引用本文复制引用
徐悦,朱海荣,辛固,程思远,刘庆刚..进气富氧比例对氨氢内燃机燃烧及排放性能的影响[J].河北科技大学学报,2025,46(6):694-703,10.基金项目
国家自然科学基金(52206224) （52206224）
