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Volume 13
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10.3390/en13205337
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Article

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

by
Yuanzhi Tang
,
Diming Lou
,
Chengguan Wang
,
Pi-qiang Tan
,
Zhiyuan Hu
,
Yunhua Zhang
and
Liang Fang
*
School of Automotive studies, Tongji University, Shanghai 201804, China
*
Author to whom correspondence should be addressed.
Energies 2020, 13(20), 5337; https://doi.org/10.3390/en13205337
Submission received: 9 September 2020 / Revised: 3 October 2020 / Accepted: 9 October 2020 / Published: 13 October 2020
(This article belongs to the Special Issue Novel Combustion Techniques for Clean Energy)
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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.
Keywords: visualization experiment; constant volume combustion vessel; evaporative spray; flame-wall impinging combustion; flame luminosity visualization experiment; constant volume combustion vessel; evaporative spray; flame-wall impinging combustion; flame luminosity

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MDPI and ACS Style

Tang, Y.; Lou, D.; Wang, C.; Tan, P.-q.; Hu, Z.; Zhang, Y.; Fang, L. Study of Visualization Experiment on the Influence of Injector Nozzle Diameter on Diesel Engine Spray Ignition and Combustion Characteristics. Energies 2020, 13, 5337. https://doi.org/10.3390/en13205337

AMA Style

Tang Y, Lou D, Wang C, Tan P-q, Hu Z, Zhang Y, Fang L. Study of Visualization Experiment on the Influence of Injector Nozzle Diameter on Diesel Engine Spray Ignition and Combustion Characteristics. Energies. 2020; 13(20):5337. https://doi.org/10.3390/en13205337

Chicago/Turabian Style

Tang, Yuanzhi, Diming Lou, Chengguan Wang, Pi-qiang Tan, Zhiyuan Hu, Yunhua Zhang, and Liang Fang. 2020. "Study of Visualization Experiment on the Influence of Injector Nozzle Diameter on Diesel Engine Spray Ignition and Combustion Characteristics" Energies 13, no. 20: 5337. https://doi.org/10.3390/en13205337

APA Style

Tang, Y., Lou, D., Wang, C., Tan, P.-q., Hu, Z., Zhang, Y., & Fang, L. (2020). Study of Visualization Experiment on the Influence of Injector Nozzle Diameter on Diesel Engine Spray Ignition and Combustion Characteristics. Energies, 13(20), 5337. https://doi.org/10.3390/en13205337

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