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

Chen, L., Li, G., Huang, D., Zhang, Z., Lu, Y. , Yu, X. and Roskilly, A. P. (2019) Experimental and numerical study on the initial tip structure evolution of diesel fuel spray under various injection and ambient pressures. Energy, 186, 115867. (doi: 10.1016/j.energy.2019.115867)

Abstract

The 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.

• Item Type: Articles
• Additional Information: This research is supported by National Natural Science Foundation of China (91641119) and the sponsorship from China Scholar Council (201806020055).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Lu, Dr Yiji
• Authors: Chen, L., Li, G., Huang, D., Zhang, Z., Lu, Y., Yu, X., and Roskilly, A. P.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Energy
• Publisher: Elsevier
• ISSN: 0360-5442
• ISSN (Online): 1873-6785
• Published Online: 06 August 2019
• Copyright Holders: Copyright © 2019 Elsevier Ltd.
• First Published: First published in Energy 186:115867
• Publisher Policy: Reproduced in accordance with the publisher copyright policy