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首页> 外文期刊>Fuel >Investigation of the performance of double-layer diverging combustion chamber in a single-cylinder diesel engine
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Investigation of the performance of double-layer diverging combustion chamber in a single-cylinder diesel engine

机译：单缸柴油发动机中双层发散燃烧室性能的研究

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摘要

Double-layer diverging combustion chamber (DLDC chamber) was designed for the diesel engine to increase the in-cylinder air utilization and change the fuel-air mixing process by diverging the fuel spray into two layers. A 135-type diesel engine was selected to find out the DLDC chamber performance characteristics and compare the DLDC chamber performance with the re-entrant chamber. The influence of the injection parameters on the DLDC chamber performance showed that the injection timing affected the chamber performance more significantly than the injection pressure; advancing the injection timing decreased the BSFC; postponing the injection timing showed the potential to decrease the exhaust emissions simultaneously and decreasing the injection pressure showed the potential to decrease the NOx without worsening the BSFC. The comparison results showed that the DLDC chamber had lower BSFC and provided less soot with specific injection timings, while the DLDC chamber obtained higher NOx; the DLDC chamber had a longer ignition delay with a higher maximum in-cylinder pressure and higher heat release rates during the premixed combustion phase. The investigation suggested that the injection parameters affected the fuel-air mixing and combustion in different layers and made the DLDC chamber obtain different engine performance; making more fuel spray flow into the upper layer and the top clearance reduced the BSFC of the DLDC chamber but sometimes increased the soot; diverging the fuel spray into the two layers improved the fuel-air mixing process and increased the heat release rates of the premixed combustion phase but still resulted in some inhomogeneous mixture distribution.
机译：设计双层脱燃室（DLDC室）设计用于柴油发动机，以通过向两层散热到两层时，使缸内空气利用和改变燃料空气混合过程。选择135型柴油发动机以找出DLDC室的性能特性，并将DLDC室性能与再参赛室进行比较。注射参数对DLDC室性能的影响表明，喷射正时比喷射压力显着影响了腔室性能;推进注射定时降低了BSFC;推迟喷射正时显示出同时降低废气排放并降低注射压力的可能性显示，在不恶化BSFC的情况下降低NOx的可能性。比较结果表明，DLDC室具有较低的BSFC，并且具有特定喷射定时的烟灰较少，而DLDC室获得更高的NOx; DLDC室在预混合燃烧相期间具有更长的火缸压力和较高的热释放速率，具有更长的点火延迟。调查表明，注射参数影响了不同层中的燃料 - 空气混合和燃烧，使DLDC室获得不同的发动机性能;将更多的燃料喷雾流入上层，顶部间隙降低了DLDC室的BSFC，但有时增加烟灰;促进燃料喷射到两层改善了燃料空气混合过程，并增加了预混燃烧相的热释放速率，但仍然导致一些不均匀的混合物分布。

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  • 来源
    《Fuel》 |2020年第may15期|117165.1-117165.10|共10页
  • 作者

    Fu Yao; Feng Liyan; Long Wuqiang; Tian Hua; Tian Jiangping; Leng Xianyin;

  • 作者单位

    Dalian Univ Technol Inst Internal Combust Engine Linggong Rd 2 Dalian Peoples R China|Dalian Univ Technol Key Lab Ocean Energy Utilizat & Energy Conservat Minist Educ Dalian Peoples R China;

    Dalian Univ Technol Inst Internal Combust Engine Linggong Rd 2 Dalian Peoples R China|Dalian Univ Technol Key Lab Ocean Energy Utilizat & Energy Conservat Minist Educ Dalian Peoples R China|Dalian Univ Technol Natl Res Ctr Shipbldg Engn Dalian Peoples R China;

    Dalian Univ Technol Inst Internal Combust Engine Linggong Rd 2 Dalian Peoples R China|Dalian Univ Technol Key Lab Ocean Energy Utilizat & Energy Conservat Minist Educ Dalian Peoples R China;

    Dalian Univ Technol Inst Internal Combust Engine Linggong Rd 2 Dalian Peoples R China|Dalian Univ Technol Key Lab Ocean Energy Utilizat & Energy Conservat Minist Educ Dalian Peoples R China;

    Dalian Univ Technol Inst Internal Combust Engine Linggong Rd 2 Dalian Peoples R China|Dalian Univ Technol Key Lab Ocean Energy Utilizat & Energy Conservat Minist Educ Dalian Peoples R China;

    Jiangsu Univ Inst Energy Res Zhenjiang 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

    Diesel engine; Double-layer diverging combustion chamber; BSFC; Exhaust emissions; Combustion process;

    机译：柴油发动机;双层发散燃烧室;BSFC;废气排放;燃烧过程;

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