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Characterisation of cyclic variability in an optically accessible IC Engine by means of phase-independent POD

Böhm, Benjamin and di Mare, Francesca and Dreizler, Andreas (2010) Characterisation of cyclic variability in an optically accessible IC Engine by means of phase-independent POD. In: Proceedings of the LES4ICE International Conference. IFP. LES for Internal Combustion Engine Flows, 18. Nov. - 19. Nov. 2010, Paris, Frankreich.

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Abstract

Investigation of cyclic variability in engine operation has recently received new impulse with the widespread application of advanced numerical and experimental techniques. The present work attempts to shed some light on the existence and nature of correlations between coherent structures dynamics and cyclic variability in IC engines by means of phase-independent Proper Orthogonal Decomposition applied to highly-resolved PIV measurements obtained in an optically accessible, motored engine. Analysis of the conditional means and variances of the reconstruction coefficients reveal interesting patterns in the break-up of coherent structures which are also confirmed by experimental observation and leave room for speculation on the true nature of the flow field at different crank angles. A first attempt has also been carried out to reconstruct missing information from available measurements, with encouraging results: the development of such interpolation/reconstruction technique could obviously have a great impact on the reduction of the cost normally involved in experimental and computational campaigns.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Characterisation of cyclic variability in an optically accessible IC Engine by means of phase-independent POD
Authors:
AuthorsInstitution or Email of Authors
Böhm, BenjaminCSM, TU-Darmstadt
di Mare, FrancescaDLR, Institute of Propulsion Technology
Dreizler, AndreasCSM, TU-Darmstadt
Date:19 November 2010
Journal or Publication Title:Proceedings of the LES4ICE International Conference
Refereed publication:Yes
In ISI Web of Science:No
Editors:
EditorsEmail
Angelberger, ChristianIFP
Publisher:IFP
Status:Published
Keywords:LES. PIV, IC, POD
Event Title:LES for Internal Combustion Engine Flows
Event Location:Paris, Frankreich
Event Type:international Conference
Event Dates:18. Nov. - 19. Nov. 2010
Organizer:IFP
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignement
DLR - Program:no assignment
DLR - Research theme (Project):other
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Numerical Methodes
Deposited By: Francesca Mare
Deposited On:19 Jan 2012 09:36
Last Modified:12 Dec 2013 21:34

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