蒋锟,郭冠伦.氢内燃机中预燃室氢射流点火的仿真[J].内燃机工程,2025,46(4):86-96.
氢内燃机中预燃室氢射流点火的仿真
Simulation of the Combustion Process in a Hydrogen Internal Combustion Engine with Pre-Chamber Hydrogen Jet Ignition
DOI：10.13949/j.cnki.nrjgc.2025.04.010
关键词:氢内燃机  预燃室  射流点火
Key Words:hydrogen internal combustion engine  pre-chamber  jet ignition
基金项目:
作者单位E-mail
蒋锟 武汉理工大学 汽车工程学院，武汉 430070 jiang_kun183@163.com 
郭冠伦* 武汉理工大学 汽车工程学院，武汉 430070 glguo@whut.edu.cn 
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摘要:利用CONVERGE软件，并基于SAGE燃烧模型，对缸内直喷氢内燃机中由主动射流引燃稀薄氢气的燃烧过程进行了数值模拟。基于文献中氢内燃机的试验数据，修正了由美国天然气研究所（Natural Gas Research Institute， GRI）提出的3.0版本甲烷燃烧机理氢气子机理中关键基元反应的反应速率。基于修正后的GRI3.0氢气子机理，比较了当量比为0.45的条件下，氢内燃机采用主动射流点火与火花点火的指示平均有效压力（indicated mean effective pressure， IMEP）、爆震倾向、排放水平。在10%放热量对应的曲轴转角（CA10）接近的情况下，与火花点火相比，采用4孔射流点火实现了更高的峰值放热率，同时爆震倾向和NOx排放水平略有上升。射流点火和火花点火的最高指示平均有效压力较为接近，射流点火的火焰传播在点火提前角不同时，因射流的贯穿距不同呈现出不同的发展模式。
Abstract:By using the CONVERGE software and the SAGE combustion model， the combustion process of dilute hydrogen ignited by active prechamber jet in a direct injection hydrogen engine was numerically simulated. Based on the experimental data of the hydrogen engine in the literature， the reaction rate of the key elementary reaction in the hydrogen sub-mechanism of the kinetics mechanism version 3.0 for methane oxidation proposed by the American Natural Gas Research Institute （GRI） was modified. Based on the modified hydrogen sub-mechanism of GRI3.0， the indicated mean effective pressure（IMEP）， knocking tendency and emission level of hydrogen engine with active jet ignition and spark ignition were compared under the condition of an equivalence ratio of 0.45. Under the condition that the crank angles at 10% heat release （CA10） are close， compared with spark ignition， four-hole pre-chamber jet ignition achieves a higher peak heat release rate， while the knocking tendency and NOx emission level increases slightly. The highest IMEPs of pre-chamber jet ignition and spark ignition are close. The flame propagation modes of jet ignition present difference because of the different jet penetration distances caused by different ignition advance angles.
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