[1]丁顺良,耿海棠,高建设,等.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(05):45-51.[doi:10.13705/j.issn.1671-6833.2024.05.014]
　DING Shunliang,GENG Haitang,GAO Jianshe,et al.Analysis of Combustion Instability for a Natural Gas Engine with Lean-burn Conditions[J].Journal of Zhengzhou University (Engineering Science),2024,45(05):45-51.[doi:10.13705/j.issn.1671-6833.2024.05.014]
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稀燃工况下天然气发动机燃烧不稳定性分析()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
45
期数:
2024年05期
页码:
45-51
栏目:
出版日期:
2024-08-08

文章信息/Info

Title:
Analysis of Combustion Instability for a Natural Gas Engine with Lean-burn Conditions
文章编号:
1671-6833(2024)05-0045-07
作者:
丁顺良1;  耿海棠1;  高建设1;  陶 征1;  宋恩哲2
1. 郑州大学 机械与动力工程学院, 河南 郑州 450001;2. 哈尔滨工程大学 动力与能源工程学院,黑龙江 哈尔滨 150001
Author(s):
DING Shunliang1;  GENG Haitang1;  GAO Jianshe1;  TAO Zheng1;  SONG Enzhe2
1. School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, China; 2. College of Power and EnergyEngineering, Harbin Engineering University, Harbin 150001, China
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
Keywords:
natural gas engine;  combustion instability;  excess air coefficient;  statistical analysis
分类号:
TK464
DOI:
10.13705/j.issn.1671-6833.2024.05.014
文献标志码:
A
摘要:
为了研究稀燃工况下天然气发动机燃烧不稳定性的变化规律,在 25%负荷、转速为 1 000 r / min 工况下针对 6组不同过量空气系数 λ 进行试验,采用统计分析方法研究了最大爆压、最大爆压对应的曲轴转角、指示平均有效压力(IMEP)的频率分布规律,并分析了各燃烧特征参数之间的关联性。 结果表明:随着 λ 增大,天然气发动机燃烧不稳定性增强;最大爆压、最大爆压对应曲轴转角的频率分布范围逐渐增大,IMEP 频率分布范围先减小后增大,循环间差异性均增加;各燃烧特征参数的关系图中,点的分布范围均增大,且存在线性关系,当混合气浓度过稀时线性关系减弱。 稀燃工况下天然气发动机产生燃烧不稳定分析,为天然气发动机稀燃稳定性优化和控制提供了理论依据。
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 of25% load and 1 000 r / min. The frequency distributions of pmax , θpmaxand IMEP were studied by statistical analysismethod, and the correlation between each combustion characteristic parameter was also analyzed. Results showedthat with the increase of λ, the combustion instability of natural gas engine enhanced and the frequency distributionranges of pmaxand θpmaxincreased gradually, while the frequency distribution range of IMEP initially decreased andthen increased, and the difference between combustion cycles increased. In each correlation diagram of combustioncharacteristic parameters, the distribution range of points becme wider, where existed a linear relationship. Whenthe mixture concentration became thinner, the linear relationship weakened. The reasons for the combustion instability of natural gas engine with lean-burn conditions were analyzed, providing a theoretical basis for the optimization and control of lean-burn combustion stability of natural gas engine.

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更新日期/Last Update: 2024-09-02