郑州大学学报（工学版）2024，Vol.45Issue(5)：45-51,7.DOI:10.13705/j.issn.1671-6833.2024.05.014
稀燃工况下天然气发动机燃烧不稳定性分析
Analysis of Combustion Instability for a Natural Gas Engine with Lean-burn Conditions
摘要
Abstract
To study the variation law of combustion instability of natural gas engine with lean-burn condition,experiments were carried out on a natural gas engine with six different excess air coefficients with the condition of 25%load and 1 000 r/min.The frequency distributions of pmax,θpmax and IMEP were studied by statistical analysis method,and the correlation between each combustion characteristic parameter was also analyzed.Results showed that with the increase of λ,the combustion instability of natural gas engine enhanced and the frequency distribution ranges of pmax and θpmax increased gradually,while the frequency distribution range of IMEP initially decreased and then increased,and the difference between combustion cycles increased.In each correlation diagram of combustion characteristic parameters,the distribution range of points becme wider,where existed a linear relationship.When the mixture concentration became thinner,the linear relationship weakened.The reasons for the combustion insta-bility of natural gas engine with lean-burn conditions were analyzed,providing a theoretical basis for the optimiza-tion and control of lean-burn combustion stability of natural gas engine.关键词
天然气发动机/燃烧不稳定性/过量空气系数/统计分析Key words
natural gas engine/combustion instability/excess air coefficient/statistical analysis分类
能源科技引用本文复制引用
丁顺良,耿海棠,高建设,陶征,宋恩哲..稀燃工况下天然气发动机燃烧不稳定性分析[J].郑州大学学报（工学版）,2024,45(5):45-51,7.基金项目
国家自然科学基金资助项目(51906225) （51906225）
船舶动力工程技术交通运输行业重点实验室(武汉理工大学)开放基金项目(KLMPET2021-05) （武汉理工大学）
教育部"春晖计划"合作科研项目(HZKY20220281) （HZKY20220281）
