Paper-Int_Valve_Jet_Flapping-rev9.pdf (547.09 kB)
A numerical study of intake valve jet flapping in a GDI engine
conference contribution
posted on 2017-06-09, 12:41 authored by Nick Beavis, Salah Ibrahim, Weeratunge MalalasekeraWeeratunge MalalasekeraThis 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.
Funding
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.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
3rd Biennial International Conference on Powertrain Modelling and ControlCitation
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.Version
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Acceptance date
2016-07-15Publication date
2016Notes
This is a conference paper.Language
- en