Numerical modelling of fuel spray formation and collapse from multi-hole injectors under flash-boiling conditions

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Title: Numerical modelling of fuel spray formation and collapse from multi-hole injectors under flash-boiling conditions
Authors: Price, C
Hamzehloo, A
Aleiferis, P
Richardson, D
Item Type: Journal Article
Abstract: Flash-boiling of fuel sprays can occur when the fuel enters a metastable superheated state, which is common in direct-injection spark-ignition engines operating at low in-cylinder pressures and/or hot fuel temperatures. The effect of flash-boiling on the resultant spray formation can be both detrimental and advantageous to engine operation, hence numerical modelling capability is essential in future engine optimisation and design. A recently-developed new model by the current authors that can be applied as zero-dimensional boundary condition for multi-hole flash-boiling fuel spray predictions was investigated over a wide range of injection systems, focusing on the model’s ability to quantify in-nozzle phase change effects and automatically predict important global spray characteristics such as spray collapse, droplet recirculation and plume merging within a Lagrangian particle tracking framework. Mesh-type sensitivity was highlighted using a uniform Cartesian and a non-uniform polyhedral mesh. The model was also normalised through a dimensionless parameter for a wide range of single component fuels. The model was validated both qualitatively and, where possible, quantitatively against experimental data. The model’s ability to deal with a wide range of injection configurations and operating conditions was confirmed and a number of limitations are highlighted and discussed with respect to future work.
Issue Date: 1-Jun-2018
Date of Acceptance: 23-Jan-2018
URI: http://hdl.handle.net/10044/1/56320
DOI: https://dx.doi.org/10.1016/j.fuel.2018.01.088
ISSN: 0016-2361
Publisher: Elsevier
Start Page: 518
End Page: 541
Journal / Book Title: Fuel
Volume: 221
Copyright Statement: © 2018 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor/Funder: Jaguar Land Rover Limited
Engineering & Physical Science Research Council (E
Funder's Grant Number: 4200083609
EP/M009424/1 - R1696
Keywords: 0904 Chemical Engineering
0913 Mechanical Engineering
0306 Physical Chemistry (Incl. Structural)
Energy
Publication Status: Published
Online Publication Date: 2018-04-02
Appears in Collections:Faculty of Engineering
Mechanical Engineering



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