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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.



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.

Item URL in elib:https://elib.dlr.de/74171/
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
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Böhm, BenjaminCSM, TU-DarmstadtUNSPECIFIED
di Mare, FrancescaDLR, Institute of Propulsion TechnologyUNSPECIFIED
Dreizler, AndreasCSM, TU-DarmstadtUNSPECIFIED
Date:19 November 2010
Journal or Publication Title:Proceedings of the LES4ICE International Conference
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
EditorsEmailEditor's ORCID iD
Angelberger, ChristianIFPUNSPECIFIED
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
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignment
DLR - Program:no assignment
DLR - Research theme (Project):no assignment
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Numerical Methodes
Deposited By: Mare, Francesca
Deposited On:19 Jan 2012 09:36
Last Modified:31 Jul 2019 19:35

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