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首页> 外文期刊>Energy Conversion & Management >Effect of injection strategy on fuel-air mixing and combustion process in a direct injection diesel rotary engine (DI-DRE)
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Effect of injection strategy on fuel-air mixing and combustion process in a direct injection diesel rotary engine (DI-DRE)

机译：喷射策略对直喷柴油旋转发动机（DI-DRE）的燃料-空气混合和燃烧过程的影响

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摘要

This paper aims at improving the combustion efficiency of direct injection diesel rotary engine (DI-DRE) by adjusting the injection strategy. An experimental validated 3D-dynamic simulation model coupled with chemical kinetics mechanism was established. A high-pressure direct injection mode was used to investigate the effect of diesel fuel injection timing (IT) and injection angle (IA) on fuel-air mixing and combustion process in a DI-DRE with spark ignition. Results showed that increasing IA changed the fuel distribution position from front to back of the combustion chamber, delayed IT and the fuel distribution area also became narrower and more concentrated. For combustion process, the fuel concentrated at partial central position towards the back of the combustion chamber was better for ignition. The distribution of more continuous mixture between the two spark plugs and concentration of more fuel near the trailing spark plug (TSP) was conducive to the improvement of combustion efficiency. The preferable combustion rate and emission performance were obtained when the IT was 80 degrees CA (BTDC) and IA was 90 degrees. Compared to the original scheme, maximum combustion pressure increased by16.82% while crank angle for maximum combustion pressure reduced by 8.19%. Soot and CO emissions reduced by 41.48% and 32.87% respectively. However, NO and CO2 emissions increased slightly.
机译：本文旨在通过调整喷射策略来提高直喷柴油旋转发动机（DI-DRE）的燃烧效率。建立了具有化学动力学机理的实验验证的3D动态仿真模型。高压直接喷射模式用于研究带有火花点火的DI-DRE中柴油燃料喷射正时（IT）和喷射角（IA）对燃料-空气混合和燃烧过程的影响。结果表明，IA的增加使燃料分配位置从燃烧室的前部向后部改变，IT延迟，并且燃料分配区域也变得更窄和更集中。对于燃烧过程，集中在部分中心位置朝燃烧室后部的燃料更易于点火。两个火花塞之间更连续的混合物的分布以及尾随火花塞（TSP）附近更多燃料的聚集有利于提高燃烧效率。当IT为80度CA（BTDC）且IA为90度时，获得了优选的燃烧速率和排放性能。与原始方案相比，最大燃烧压力增加了16.82％，而最大燃烧压力的曲柄角减少了8.19％。烟尘和一氧化碳排放量分别减少了41.48％和32.87％。但是，NO和CO2排放量略有增加。

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  • 来源
    《Energy Conversion & Management》 |2017年第12期|68-80|共13页
  • 作者

    Chen Wei; Pan Jianfeng; Fan Baowei; Liu Yangxian; Peter Otchere;

  • 作者单位

    Jiangsu Univ, Sch Energy & Power Engn, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China;

    Jiangsu Univ, Sch Energy & Power Engn, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China;

    Jiangsu Univ, Sch Energy & Power Engn, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China;

    Jiangsu Univ, Sch Energy & Power Engn, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China;

    Jiangsu Univ, Sch Energy & Power Engn, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Direct injection; Diesel; Rotary engine; Mixture formation; Combustion process; Emissions;

    机译：直接喷射;柴油;旋转发动机;混合物形成;燃烧过程;排放;

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