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Experimental and numerical study on the initial tip structure evolution of diesel fuel spray under various injection and ambient pressures

Lookup NU author(s): Zhichao Zhang, Dr Yiji Lu, Professor Tony Roskilly

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


Abstract

© 2019 Elsevier LtdThe formation and evolution of the initial spray structure of diesel fuel in the near-nozzle region under different injection and ambient pressures were studied. A visualisation experiment study on diesel fuel using long-distance microscopy and nanosecond-pulse flashlight was performed. Four types of spray tip structure were identified and named as ‘needle’, ‘bubble’, ‘mushroom’ and ‘umbrella’. The obtained high-resolution images revealed that both injection pressure and ambient pressure had a significant influence on the evolution of the spray tip structure. The measurement of the spray penetration and spray angle showed that the increase of injection pressure enhanced spray dispersion while the increase of ambient pressure exhibited an opposite effect. In order to provide a better understanding on the formation mechanism, a numerical study based on large eddy simulation (LES) and volume of fluid (VOF) interface capturing technique was conducted.


Publication metadata

Author(s): Chen L, Li G, Huang D, Zhang Z, Lu Y, Yu X, Roskilly AP

Publication type: Article

Publication status: Published

Journal: Energy

Year: 2019

Volume: 186

Print publication date: 01/11/2019

Online publication date: 06/08/2019

Acceptance date: 01/08/2019

Date deposited: 22/10/2019

ISSN (print): 0360-5442

ISSN (electronic): 1873-6785

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.energy.2019.115867

DOI: 10.1016/j.energy.2019.115867


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