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Application of JP-8 in a heavy duty diesel engine

机译：JP-8在重型柴油机中的应用

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摘要

An experimental study was carried out to investigate the combustion and emission of JP-8 and diesel fuel in an optically-accessible single-cylinder heavy duty diesel engine equipped with a high pressure common-rail injection system in order to evaluate the feasibility of JP-8 application in diesel engine. The basic spray characteristics, including spray tip penetration and spray angle, were investigated with macroscopic spray images obtained by the Mie-scattering method. The combustion and emission characteristics were analyzed on the basis of the results obtained from the spray experiments. Visualization by direct imaging was used to characterize the combustion process. It was found that JP-8 had a shorter spray tip penetration and wider spray angle than diesel fuel mainly due to the faster vaporization characteristic of JP-8. The peak heat release rate was higher and the pre-mixed burn portion was larger with JP-8 due to its superior mixing rate through faster vaporization characteristics. Furthermore, ignition delay with JP-8 was longer than that with diesel fuel due to the lower cetane number of JP-8. In terms of emission, JP-8 showed a benefit in smoke reduction while it produced larger amounts of HC and NO_X. Longer ignition delay and accelerated oxidation in the late stage of JP-8 combustion were verified by direct imaging.
机译：为了评估JP-的可行性，进行了一项实验研究，以研究配备了高压共轨喷射系统的光学可访问单缸重型柴油机中JP-8和柴油的燃烧和排放。 8在柴油机上的应用。通过Mie散射法获得的宏观喷雾图像研究了基本的喷雾特性，包括喷嘴的针入度和喷雾角度。根据从喷雾实验获得的结果分析燃烧和排放特性。通过直接成像的可视化被用来表征燃烧过程。已经发现，JP-8比柴油燃料具有更短的喷嘴尖端穿透性和更宽的喷射角，这主要是由于JP-8具有更快的汽化特性。 JP-8具有较高的混合速率和更快的汽化特性，因此峰值放热速率较高，而预混合燃烧部分较大。此外，由于JP-8的十六烷值较低，因此JP-8的点火延迟比柴油燃料的延迟长。就排放而言，JP-8在减少烟雾方面显示出优势，同时它产生了大量的HC和NO_X。通过直接成像验证了JP-8燃烧后期较长的点火延迟和加速氧化。

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  • 来源
    《Fuel》 |2011年第5期|p.1762-1770|共9页
  • 作者

    Jinwoo Lee; Choongsik Bae;

  • 作者单位

    Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 373-1 Cuseong-dong, Yuseong-gu, Daejeon, Republic of Korea;

    Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 373-1 Cuseong-dong, Yuseong-gu, Daejeon, Republic of Korea;

  • 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

    jp-8; diesel fuel; macroscopic fuel spray; direct imaging;

    机译：jp-8;柴油;宏观喷射;直接成像;

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