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Analytical and experimental investigations of dual-plane PIV by correlating images of particles within parallel light sheet planes

Raffel, M. and Westerweel, J. and Willert, C. and Gharib, M. and Kompenhans, J. (1995) Analytical and experimental investigations of dual-plane PIV by correlating images of particles within parallel light sheet planes. In: SPIE International Symposium on Optical Science, Engineering and Instrumentation, Vol. 2546, pp. 75-86. 5th Int. Symposium on 'Optical Diagnostics in Fluid and Thermal Flows', San Diego, 9-14 July 1995.

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Abstract

In its "classical" form particle image velocimetry (PIV) extracts two components of the flow velocity vector by measuring the displacement of tracer particles within a double-pulsed laser light sheet. The method described in this paper is based on the additional recording of a third exposure of the tracer particles in a parallel light sheet, which isslightly displaced with respect to the first one. The particle images resulting from these three exposures are stored on separate frames. The locations of the correlation peaks, as obtained by cross-correlation methods, are used to determine the projections of the velocity vectors onto the plane between both light sheets. In the manner described below, the amplitudes of these peaks are used to obtain information about the velocity component perpendicular to the light sheet planes. The mathematical background of this method is described in the paper.Numerical simulations show the influence of the main parameters (e.g. light sheet thickness, light sheet displacement and out-of- plane component) on the resolution and reliability of the new method.Two different recording procedures and their results will be shown to demonstrate the ease of operation when applying this technique to liquid flows.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1995,
Title:Analytical and experimental investigations of dual-plane PIV by correlating images of particles within parallel light sheet planes
Authors:
AuthorsInstitution or Email of Authors
Raffel, M.UNSPECIFIED
Westerweel, J.Delft University of Technology
Willert, C.UNSPECIFIED
Gharib, M.CALTECH, Graduate Aeronautical Lab., Pasadena
Kompenhans, J.UNSPECIFIED
Date:1995
Journal or Publication Title:SPIE International Symposium on Optical Science, Engineering and Instrumentation
Volume:Vol. 2546
Page Range:pp. 75-86
Series Name:SPIE Proceedings, Article No. 2456-13
Status:Published
Keywords:particle image velocimetry, dual-plane correlation, scanning light sheet, three-dimensional flow measurements
Event Title:5th Int. Symposium on 'Optical Diagnostics in Fluid and Thermal Flows', San Diego, 9-14 July 1995
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L SI - Versuchs- und Simulationstechniken
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: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:08

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