汽车工程 ›› 2023, Vol. 45 ›› Issue (7): 1192-1199.doi: 10.19562/j.chinasae.qcgc.2023.07.010

所属专题: 发动机&排放专题2023年

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基于RCCI的柴油-天然气-氢气三燃料发动机整机性能研究

秦文瑾(),石晶晶,徐礼辉,张振东,孙跃东   

  1. 上海理工大学机械工程学院,上海 200093
  • 收稿日期:2022-12-12 修回日期:2023-02-14 出版日期:2023-07-25 发布日期:2023-07-25
  • 通讯作者: 秦文瑾 E-mail:qinwenjin@usst.edu.cn
  • 基金资助:
    上海市科技计划项目(21010503000)

Performance Study of Diesel Natural Gas Hydrogen Three Fuel Engine Based on RCCI

Wenjin Qin(),Jingjing Shi,Lihui Xu,Zhendong Zhang,Yuedong Sun   

  1. School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093
  • Received:2022-12-12 Revised:2023-02-14 Online:2023-07-25 Published:2023-07-25
  • Contact: Wenjin Qin E-mail:qinwenjin@usst.edu.cn

摘要:

随着环境污染和能源消耗问题的日益严重,寻求清洁可替代燃料与新型燃烧技术已经逐渐成为当今发动机的研究重点。本文对一台柴油-天然气-氢气三燃料RCCI发动机进行数值模拟计算,探究了不同氢气添加比例对发动机整机性能的影响。研究结果表明,随着氢气添加比例的增加,缸内混合气的燃烧速率显著提升,缸内压力峰值逐渐增加且出现峰值的相位提前,缸内平均温度增加;同时,发动机指示热效率增加,等效指示燃油消耗率减小,发动机的燃油经济性得到提升;由于压力升高率与声响强度在可允许的范围内,发动机的运行工况良好;另外,排气温度会随氢气添加比例的增加而降低,废气能量呈现下降趋势。综合来看,适当增加氢气添加比例,对改善发动机的整机性能有利。

关键词: RCCI, 三燃料, 发动机, 氢气, 整机性能

Abstract:

With the increasingly serious problems of environmental pollution and energy consumption, the search for clean alternative fuels and new combustion technologies has gradually become the focus of engine research. In this paper, a diesel natural gas hydrogen three fuel RCCI internal combustion engine is numerically simulated, and the effect of different hydrogen ratios on the engine performance is discussed. The results show that with the increase of hydrogen addition ratio, the combustion rate of the in cylinder mixture is significantly increased, the peak pressure in the cylinder gradually increases, and the phase of the peak value is advanced, with the average temperature in the cylinder increased. Meanwhile, the indicated thermal efficiency of the engine increases, and the equivalent indicated fuel consumption rate decreases, which improves the fuel economy of the engine. Because the pressure rise rate and the sound intensity are within the allowable range, the engine operates well. In addition, the exhaust gas temperature decreases with the increase of hydrogen addition ratio, and the exhaust gas energy shows a downward trend. In general, appropriate increase of the hydrogen addition proportion is beneficial to improve the overall performance of the engine.

Key words: RCCI, three fuel, engine, hydrogen, overall performance