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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/25332

Title: A numerical study of intake valve jet flapping in a GDI engine
Authors: Beavis, Nicholas J.
Ibrahim, Salah S.
Malalasekera, W.
Keywords: CFD
Flow
GDI
Numerical
Valve jet flapping
Issue Date: 2016
Citation: BEAVIS, N.J., IBRAHIM, S.S. and MALALASEKERA, W., 2016. A numerical study of intake valve jet flapping in a GDI engine. Presented at the 3rd Biennial International Conference on Powertrain Modelling and Control, Loughborough, UK, 7th-9th September 2016.
Abstract: This paper presents findings from a numerical study of intake valve jet flapping within a gasoline direct injection engine, using a large eddy simulation turbulence modelling approach. The experimental test case and computational setup, including choice of sub-grid scale turbulence model, are presented and discussed. An example cycle where intake valve jet flapping is seen to be prominent is discussed in detail. It was found to be initiated as a consequence of turbulent fluctuations in the intake valve curtains. Cycle-by-cycle variations in valve curtain flux and subsequent jet flapping events are investigated and significant cyclic variability is found. Finally, it was observed that due to the highly transient nature of this flow phenomenon, the typical ensemble-averaging procedure used in LES simulations causes most information related to this process to be lost.
Description: This conference paper will also be published in the journal International Journal of Powertrains. This paper is closed access until the journal article can be made open access.
Sponsor: This work was supported by Jaguar Land Rover and the UK-EPSRC grant EP/K014102/1 as part of the jointly funded Programme for Simulation Innovation.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/25332
Appears in Collections:Closed Access (Aeronautical and Automotive Engineering)

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