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Proper orthogonal decomposition applied to PIV data for the oblique transition in a Blasius boundary layer

Wiegel, M. and Fischer, M. (1995) Proper orthogonal decomposition applied to PIV data for the oblique transition in a Blasius boundary layer. Optical Techniques in Fluid, Thermal, and Combustion Flow Part of SPIE's International Symposium on Optical Science, Engineering, and Instrumentation 9-14 July 1995, San Diego, CA, USA.

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Abstract

Using experimental data from Particle Ima Velocimetry (PIV) measurements, coherent structures of a transitional, spatially developing boundary layer are determined. The coherent structures are calculated utilizing the Proper Orthogonal Decomposition (POD), which is based on an expansion of the flow field variables into so- called Karhunen Loeve eigenfunctins. To get reproducible flow conditions we excite the flow with controlled disturbances by means of periodic velocity fluctuations. We are able to introduce two-and three-dimensional traveling waves. Therefore it is possible to investigate different transition scenarios. This paper focus on the oblique transition. Phase locked signals allows to record the flow field at certain instants of time. We can show that PIV is a suitable technique to provide experimental data for POD. The POD shows that already a small number of modes cover most of the energy.

Item URL in elib:https://elib.dlr.de/37328/
Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1995, pages=11,
Title:Proper orthogonal decomposition applied to PIV data for the oblique transition in a Blasius boundary layer
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wiegel, M.UNSPECIFIEDUNSPECIFIED
Fischer, M.UNSPECIFIEDUNSPECIFIED
Date:1995
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:2546
Page Range:pp. 87-97
Status:Published
Keywords:coherent structures, Particle Image Velocimetry, Proper Orthogonal Decomposition, oblique transition, Blasius boundary layer
Event Title:Optical Techniques in Fluid, Thermal, and Combustion Flow Part of SPIE's International Symposium on Optical Science, Engineering, and Instrumentation 9-14 July 1995, San Diego, CA, USA
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L TG - Querschnittstechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik > Institut für Experimentelle Strömungsmechanik
Deposited By: DLR-Beauftragter, elib
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:08

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