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Study of Visualization Experiment on the Influence of Injector Nozzle Diameter on Diesel Engine Spray Ignition and Combustion Characteristics

Author

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  • Yuanzhi Tang

    (School of Automotive studies, Tongji University, Shanghai 201804, China)

  • Diming Lou

    (School of Automotive studies, Tongji University, Shanghai 201804, China)

  • Chengguan Wang

    (School of Automotive studies, Tongji University, Shanghai 201804, China)

  • Pi-qiang Tan

    (School of Automotive studies, Tongji University, Shanghai 201804, China)

  • Zhiyuan Hu

    (School of Automotive studies, Tongji University, Shanghai 201804, China)

  • Yunhua Zhang

    (School of Automotive studies, Tongji University, Shanghai 201804, China)

  • Liang Fang

    (School of Automotive studies, Tongji University, Shanghai 201804, China)

Abstract

The elementary research of spray and combustion is of great significance to the development of compactness of modern diesel engines. In this paper, three injectors with different nozzle orifice diameters (0.23 mm, 0.27 mm and 0.31 mm) were used to study the diesel spray, ignition and flame-wall impingement visualization experiment. This paper studied the influence of different nozzle sizes on the trends of spray, ignition and flame diffusion under the flame-wall impinging combustion and used the flame luminosity to characterize the soot generation in combustion. By analyzing the quantitative data, such as spray penetration, ignition delay, flame area and flame luminosity systematically, it was shown that the smaller nozzle benefitted diesel combustion to some extent. The 0.23 mm nozzle injector in these experiments had the best fuel-air mixing effect under 800 K. The length of the spray liquid under the 0.23 mm nozzle condition was 19% and 23% shorter than that of 0.27 and 0.31 mm, respectively. Smaller orifice size of the nozzle can help to reach the gas ignition conditions more effectively. Without liquid fuel impingement, the simple flame-wall impingement will not change the trend of the nozzle influence on combustion. The total amount of accumulated soot according to the approximate luminosity spatial integral calculation in the combustion process was reduced by 37% and 43% under 0.27 mm and 0.23 mm nozzles, respectively, which is favorable for the clean combustion of diesel engines.

Suggested Citation

  • Yuanzhi Tang & Diming Lou & Chengguan Wang & Pi-qiang Tan & Zhiyuan Hu & Yunhua Zhang & Liang Fang, 2020. "Study of Visualization Experiment on the Influence of Injector Nozzle Diameter on Diesel Engine Spray Ignition and Combustion Characteristics," Energies, MDPI, vol. 13(20), pages 1-18, October.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:20:p:5337-:d:427442
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    References listed on IDEAS

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    1. Wang, Xiangang & Huang, Zuohua & Zhang, Wu & Kuti, Olawole Abiola & Nishida, Keiya, 2011. "Effects of ultra-high injection pressure and micro-hole nozzle on flame structure and soot formation of impinging diesel spray," Applied Energy, Elsevier, vol. 88(5), pages 1620-1628, May.
    2. Merola, Simona S. & Vaglieco, Bianca M., 2009. "Optical investigations of fuel deposition burning in ported fuel injection (PFI) spark-ignition (SI) engine," Energy, Elsevier, vol. 34(12), pages 2108-2115.
    3. Ma, Yinjie & Huang, Sheng & Huang, Ronghua & Zhang, Yu & Xu, Shijie, 2017. "Ignition and combustion characteristics of n-pentanol–diesel blends in a constant volume chamber," Applied Energy, Elsevier, vol. 185(P1), pages 519-530.
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    Cited by:

    1. Jaroslaw Krzywanski & Wojciech Nowak & Karol Sztekler, 2022. "Novel Combustion Techniques for Clean Energy," Energies, MDPI, vol. 15(13), pages 1-3, June.

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