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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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)|
|Title:||Analytical and experimental investigations of dual-plane PIV by correlating images of particles within parallel light sheet planes|
|Journal or Publication Title:||SPIE International Symposium on Optical Science, Engineering and Instrumentation|
|Page Range:||pp. 75-86|
|Series Name:||SPIE Proceedings, Article No. 2456-13|
|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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