进气温度及进气压力对缸内燃烧效果和传热传质效果有很大的影响，进而影响柴油机的动力特性和排放特性，为此本文开展了进气参数对柴油引燃的甲醇发动机燃烧和排放性能的影响研究。研究表明，与原机进气压力1.91 bar相比，进气压力在2.31 bar时，柴油机缸内最大爆发压力升高14.3%，CO最终排放量下降66.3%，soot最终排放量升高20.8%，NOx最终排放量下降2.8%。较原机进气温度380 K相比，进气温度在420 K时，缸内最大爆发压力下降4.2%，CO最终排放量升高2.3倍，soot最终排放量升高15.7%，NOx最终排放量升高19.4%。2种进气参数的组合可以给柴油机带来更高的动力性和更好的排放性能。研究结果表明，适当的调整进气压力和进气温度可以改善柴油引燃的甲醇发动机的动力性能和排放性能。
The intake temperature and pressure have a significant impact on the combustion efficiency and heat and mass transfer efficiency in the cylinder, which in turn affects the power and emission characteristics of diesel engines. Therefore, this paper conducts a study on the influence of intake parameters on the combustion and emission performance of diesel fueled methanol engines. Research shows that compared to the original engine intake pressure of 1.91 bar, when the intake pressure is 2.31 bar, the maximum explosion pressure in the diesel engine cylinder increases by 14.3%, the final CO emissions decrease by 66.3%, the final soot emissions increase by 20.8%, and the final NOx emissions decrease by 2.8%. Compared with the original intake temperature of 380 K, when the intake temperature is 420 K, the maximum explosion pressure in the cylinder decreases by 4.2%, the final CO emissions increase by 2.3 times, the final soot emissions increase by 15.7%, and the final NOx emissions increase by 19.4%. The combination of two intake parameters can bring higher power and better emission performance to diesel engines. The research results of this article indicate that appropriate adjustment of intake pressure and temperature can improve the power performance and emission performance of diesel fueled methanol engines.
2024,46(14): 121-126 收稿日期：2023-10-07
DOI：10.3404/j.issn.1672-7649.2024.14.020
分类号：TK411+.7
基金项目：武警部队高层次人才培养对象创新研究资助项目（zzky20222415）
作者简介：陶冠臻(1995-),男,助教,研究方向为内燃机节能与排放控制技术
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