不同大气压力对柴油机燃烧和排放性能的影响  

Effect of Different Atmospheric Pressures on Combustion and Emission Performance of Diesel Engines

作　　者：陈亮 侯怡冰 朱承乾 徐华伟 Chen Liang;Hou Yi-bing;Zhu Cheng-qian;Xu Hua-wei(School of Mechanics and Transportation,Southwest Forestry University,Yunnan Kunming 650224)

机构地区：[1]西南林业大学机械与交通学院,云南昆明650224

出　　处：《内燃机与配件》2025年第4期22-24,共3页Internal Combustion Engine & Parts

基　　金：云南省教育厅科学研究基金项目(2024Y609);云南省农业联合面上项目(202101BD070001-110)。

摘　　要：本文运用计算流体动力学(CFD)软件建立了柴油机1/6燃烧室的仿真模型,并通过柴油机台架试验获取的试验数据对该模型的准确性进行了验证。同时,分析了不同海拔高度对于柴油机燃烧及排放性能的影响。研究结果表明,随着海拔的提升,缸内压力和放热率的峰值均有所降低,而缸内温度的分布则呈现出先降低后增加的趋势,氮氧化物的排放量减少,同时碳烟的排放量有所增加。This study employs Computational Fluid Dynamics(CFD)software to establish a 1/6 scale model of a diesel engine combustion chamber.The accuracy of the simulation model is validated using experimental data obtained from diesel engine bench tests.Furthermore,the influence of different altitudes on the combustion and emission performance of the diesel engine is analysed.The results indicate that as the altitude increases,both the peak in-cylinder pressure and the rate of heat release decrease.The distribution of the in-cylinder temperature initially declines and then rises,while the emission of nitrogen oxides decreases and the emission of soot increases.

关 键 词：柴油机 海拔 燃烧 排放 数值模拟 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程]