摘要
预燃室射流燃烧技术是实现点燃式发动机热效率突破的重要技术路线,目前针对预燃室发动机射流燃烧机理仍存在诸多研究不足。本文回顾了预燃室发动机射流燃烧技术发展,报道了预燃室发动机射流燃烧激光诊断和数值仿真近期研究进展。研究表明,预燃室发动机点火模式分为“火焰点火”和“射流点火”两种。“火焰点火”模式下预燃室喷孔处不发生火焰淬熄,燃烧稳定性好,利于提高发动机热效率。氨燃料由于火焰淬熄距离大,预燃室点火易出现“射流点火”模式,导致发动机燃烧稳定性和热效率下降。
Pre-chamber jet combustion technology is a crucial pathway for achieving breakthroughs in the thermal efficiency of spark-ignition engines.However,there are still many research gaps regarding the combustion mechanisms of pre-chamber engines.This paper reviews the development of pre-chamber engine jet combustion technology and reports recent advancements in laser diagnostics and numerical simulations of pre-chamber engine jet combustion.Research indicates that the ignition modes of pre-chamber engines can be categorized into"flame ignition"and"jet ignition"In the fame ignition mode,fame quenching does not occur at the pre-chamber nozzle,resulting in good combustion stability and improved engine thermal efficiency.Due to the large flame quenching distance of ammonia fuel,pre-chamber ignition tends to exhibit the jet ignition mode,which can lead to reduced combustion stability and thermal efficiency of the engines.
作者
唐青龙
尧命发
TANG Qinglong;YAO Mingfa(State Key Laboratory of Engines,Tianjin University,,Tianjin 300072,China)
出处
《工程热物理学报》
北大核心
2025年第6期2045-2054,共10页
Journal of Engineering Thermophysics
基金
国家自然科学基金青年基金项目(No.52206166)
国家自然科学基金重点项目(No.52130605)。
关键词
预燃室发动机
射流燃烧
点火模式
氨
激光诊断
pre-chamber engines
jet combustion
ignition mode
ammonia
laser diagnostics
