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汽车安全与节能学报

汽车安全与节能学报 ›› 2024, Vol. 15 ›› Issue (3): 395-401.DOI: 10.3969/j.issn.1674-8484.2024.03.013

• 汽车节能与环保 • 上一篇    下一篇

氨替代率对柴油发动机的燃烧及排放性能的仿真

胡圣琦1(), 王洁1, 蔡云凯2,*(), 祝能   

  1. 1.武汉科技大学 汽车与交通工程学院，武汉 430081，中国
    2.湖北汽车工业学院 汽车工程学院，十堰 442002，中国
  • 收稿日期:2023-12-15 修回日期:2024-01-12 出版日期:2024-06-30 发布日期:2024-07-01
  • 通讯作者: *蔡云凯，讲师。E-mail：20230128@huat.edu.cn。
  • 作者简介:胡圣琦（1997—），男（汉），河北，硕士研究生。E-mail：hushengqi1997@163.com。
  • 基金资助:
    国家自然科学基金资助项目(52301382);湖北省自然科学基金资助项目(2022CFB730)

Digital simulation of the ammonia replacement rate on the combustion and emission performances of diesel engine

HU Shengqi1(), WANG Jie1, CAI Yunkai2,*(), ZHU Neng   

  1. 1. School of Automotive and Traffic Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
    2. School of Automotive Engineering, Hubei Institute of Automotive Technology, Shiyan 442002, China
  • Received:2023-12-15 Revised:2024-01-12 Online:2024-06-30 Published:2024-07-01

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摘要：

内燃机引入氨燃料，有利于减少汽车污染物排放。该文研究了掺氨后的柴油发动机的燃烧品质以及污染物排放性能。针对某商用车柴油发动机，采用发动机缸内Converge仿真分析软件，建立三维仿真模型，分析掺氨能量比为0%~40%的5组燃料的燃烧及排放性能。结果表明：随着氨替代率的提高，发动机滞燃期有延长趋势，燃烧持续期先缩短后延长，缸内平均温度、缸压下降；CO、NO和碳烟排放显著降低，氨替代率为40%时，CO排放量降低了41.6%，NO排放量降低了68.7%，碳烟排放量降低了17.2%。因而，柴油发动机掺氨燃烧可有效降低排放水平，但需要控制氨能量比例在合理范围以防止燃烧恶化。

关键词: 柴油发动机, 废气减排, 氨、柴油双燃料, 替代率, 燃烧特性, 排放特性

Abstract:

Introducing ammonia fuel into internal combustion engines is beneficial for reducing vehicle pollutant emissions. This article investigated the combustion quality and pollutant emission performance of diesel engines doped with ammonia. A three-dimensional engine cylinder digital simulation model was established for a commercial vehicle diesel engine by using the engine cylinder the Converge simulation analysis software to analyze the combustion and emission performance of five fuel groups with ammonia blending energy ratios of 0%~40%. The results show that the engine ignition delay period tends to extend with the increase of ammonia substitution rate; The combustion duration first shortens and then extends; And the average temperature and the pressure in the cylinder decreases; The CO, NO, and soot emissions are significantly reduced; The CO emissions decreases by 41.6%, the NO emissions decreases by 68.7%, and the soot emissions decreases by 17.2%, when the ammonia substitution rate is 40%. Therefore, adding ammonia to diesel engines for combustion can effectively reduce emission levels, but it is necessary to control the ammonia energy ratio within a reasonable range to prevent combustion deterioration.

Key words: diesel engines, reduce of exhaust gas emission, ammonia-diesel dual fuel, substitution rate, combustion characteristics, emission characteristics

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