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Numerical and experimental investigation of early stage diesel sprays


Ghiji, M and Goldsworthy, L and Brandner, PA and Garaniya, V and Hield, P, Numerical and experimental investigation of early stage diesel sprays, Fuel, 175 pp. 274-286. ISSN 0016-2361 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 Elsevier Ltd. All rights reserved.

DOI: doi:10.1016/j.fuel.2016.02.040


Experimental and numerical investigations of primary atomization in a high-pressure diesel jet are presented. Information on flow processes and structures inside and near nozzle exit are described at early and quasi-steady stages of injection. The numerical method is based on the Volume Of Fluid (VOF) phase-fraction interface capturing technique, in an Eulerian framework. The influence of grid resolution, convection interpolation scheme and temporal integration scheme on the modeling of jet physics are investigated. The present flow setup includes in-nozzle disturbances with the no-slip condition at the walls. All experimental operating conditions are replicated in the numerical models. The early stage liquid jet leading edge demonstrates an umbrella-shaped structure in the numerical results which is in qualitative agreement with experimental imaging. Data obtained provide insight into the flow behavior in the dense region including commencement of fragmentation and early spray angle formation. Experimental images show a cloud of air–fuel mixture at the early stage of injection. The existence of ingested air inside the injector after needle closure could be the source of the observed deviation between experimental and numerical results. The results show that the jet breakup rate and liquid core length increase in cases with higher grid resolutions. The early spray angle from the numerical results at the quasi-steady stage, shows good agreement with experimental data.

Item Details

Item Type:Refereed Article
Keywords:high-pressure diesel spray, primary atomization, near-nozzle flow, in-nozzle turbulence, large eddy simulation, Eulerian/VOF
Research Division:Engineering
Research Group:Automotive engineering
Research Field:Automotive combustion and fuel engineering
Objective Division:Transport
Objective Group:Environmentally sustainable transport activities
Objective Field:Environmentally sustainable transport activities not elsewhere classified
UTAS Author:Ghiji, M (Dr Matt Ghiji)
UTAS Author:Goldsworthy, L (Dr Laurie Goldsworthy)
UTAS Author:Brandner, PA (Professor Paul Brandner)
UTAS Author:Garaniya, V (Associate Professor Vikram Garaniya)
ID Code:107055
Year Published:2016
Web of Science® Times Cited:44
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2016-03-03
Last Modified:2017-11-03

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