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首页> 外文期刊>Energy Conversion & Management >Study of combustion and emission characteristics of a diesel engine fueled with diesel, butanol-diesel and hexanol-diesel mixtures under low intake pressure conditions
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Study of combustion and emission characteristics of a diesel engine fueled with diesel, butanol-diesel and hexanol-diesel mixtures under low intake pressure conditions

机译：低进气压力条件下用柴油机，丁醇柴油和六烷醇柴油混合物燃烧的柴油机燃烧和排放特性研究

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摘要

A significant number of landmasses on earth are above sea level where the ambient pressure is below 1 atm. With economy and population growth, the rapid expansion of human activities at these high-altitude regions is expected. However, the research on diesel engine combustion and emissions under low intake pressure conditions are limited, especially when alcohol-diesel mixtures are used as fuel. In this work, the combustion and emission characteristics of a common-rail diesel engine fueled with diesel, butanol-diesel and hexanol-diesel mixtures under low intake pressure conditions were investigated. Mixtures were prepared with two blend ratios, which were 20% and 40% by volume. Experiments were conducted under five different intake pressures (1.2, 1.0, 0.8, 0.7, and 0.6 atm) and two engine loads (0.45 MPa and 0.55 MPa IMEP). The combustion characteristics and engine performance were analyzed using measurements of in-cylinder pressure, HRR, ignition delay, combustion duration, ISFC and ITE. NOx, soot, CO, and HC emissions under different operating conditions were also measured and discussed. Results revealed lower intake pressure led to higher ISFC and lower ITE. Soot and CO emissions increased significantly once intake pressure dropped below 0.8 atm, while NOx emissions decreased with intake pressure reduction. Under the same conditions, adding renewable alcohol extended the ignition delay and reduced the combustion duration. These effects were more pronounced for combustion of butanol-diesel mixtures than combustion of hexanol-diesel mixtures. Combustion of hexanol-diesel mixture with 20% blend ratio (H20) had similar or lower ISFC and higher ITE than diesel combustion when intake pressure was lower than 1 atm due to its fuel oxygen content and similar fuel properties as diesel. The engine fueled with H20 could still operate under intake pressure of 0.6 atm and engine load of 0.45 MPa IMEP, but the engine misfired when other fuels were used. In terms of emission characteristics, adding alcohol significantly reduced soot and CO emissions, especially when intake pressure was below 1 atm. However, combustion of alcohol-diesel mixtures produced more NOx emissions than diesel combustion under the same conditions.
机译：大量地球上的陆地上大于海平面，环境压力低于1个atm。随着经济和人口增长，预计这些高空地区人类活动的快速扩张是预期的。然而，在低进气压力条件下的柴油发动机燃烧和排放的研究受到限制，特别是当醇柴油混合物用作燃料时。在这项工作中，研究了用柴油，丁醇 - 柴油和己醇 - 柴油混合物在低进气条件下燃料的共轨柴油机的燃烧和排放特性。用两个共混物比制备混合物，其增合比例为20％和40体积％。实验在五种不同的进气压（1.2,1.0,0.8,0.7和0.6atm）下进行，两个发动机负载（0.45MPa和0.55MPa）。使用缸内压力，HRR，点火延迟，燃烧持续时间，ISFC和ITE的测量分析燃烧特性和发动机性能。还测量并讨论了不同操作条件下的NOx，烟灰，CO和HC排放。结果显示出较低的摄入压力导致较高的ISFC和降低ITE。一旦进气压力下降到0.8atm以下，烟灰和CO排放量显着增加，而NOx排放随进入压力降低而降低。在相同的条件下，添加可再生酒精延长点火延迟并降低燃烧持续时间。对于丁醇 - 柴油混合物的燃烧而言，这些效果比己醇 - 柴油混合物的燃烧更加明显。当由于其燃料氧含量和与柴油的类似燃料特性为柴油时，具有20％混合比（H20）的己醇 - 柴油混合物（H20）的燃烧与柴油燃烧相似或更低的ISFC和更高的ISFC燃烧。用H20燃料的发动机仍然可以在0.6 atm和0.45MPa的发动机负荷的进气压力下运行，但在使用其他燃料时发动机耗尽。在排放特性方面，加入醇显着减少烟灰和共同排放，特别是当进气压力低于1个atm时。然而，酒精 - 柴油混合物的燃烧在相同条件下产生比柴油燃烧更多的NOx排放量。

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  • 来源
    《Energy Conversion & Management》 |2021年第9期|114273.1-114273.10|共10页
  • 作者

    Yan Junhao; Gao Suya; Zhao Weihua; Lee Timothy H.;

  • 作者单位

    Univ Illinois Dept Mech Sci & Engn Urbana IL 61801 USA;

    Univ Illinois Dept Mech Sci & Engn Urbana IL 61801 USA;

    Univ Illinois Dept Mech Sci & Engn Urbana IL 61801 USA|Beijing Inst Technol Sch Mech Engn Beijing 100081 Peoples R China;

    Zhejiang Univ ZJU UIUC Inst Haining 314400 Zhejiang 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

    Low intake pressure; Butanol; Hexanol; Diesel; Combustion; Emission;

    机译：低摄入压力;丁醇;六醇;柴油;燃烧;排放;

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