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Comparisoin of PIV data with hot-wire measurements and calculations obtained for instabilities in a flat plate boundary layer

Fischer, M. (1994) Comparisoin of PIV data with hot-wire measurements and calculations obtained for instabilities in a flat plate boundary layer. In: Vergleich von Daten fuer die Entwicklung von Grenzschichtinstabilitaeten, ermittelt aus PIV - und Hitzdrahtmessungen sowie Rechnungen, 2., 2.-. Seventh Internation Symposium on Application of Laser Techniques to Fluid Mechanics, 10.7.-15.7.94, Lissabon, Portugal.

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Abstract

Artificially forced instabilities were studied experimentally in the transition region of a Blasius boundary layer in air by means of Particle Image Velocimetry (PIV) and hot-wire anemometry. Reproducible and constant conditions in the development of the instabilities were achieved by forcing the boundary layer with well controlled disturbances. The arrangement for artificial excitation provides the possibility to generate the fundamental and the subharmonic transition type as well. Out of the instantaneous velocity fields of the PIV recordings integral quantities were obtained by means of data analysis. These integral data were compared with data achieved by the hot-wire measurements and calculations (Numerical Simulation). The procedure itself to obtain integral data out of the PIV recordings and the limiting parameters of this procedure will be presented.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1994,
Title:Comparisoin of PIV data with hot-wire measurements and calculations obtained for instabilities in a flat plate boundary layer
Authors:
AuthorsInstitution or Email of Authors
Fischer, M.UNSPECIFIED
Date:1994
Journal or Publication Title:Vergleich von Daten fuer die Entwicklung von Grenzschichtinstabilitaeten, ermittelt aus PIV - und Hitzdrahtmessungen sowie Rechnungen
Volume:2.
Page Range:2.-
Status:Published
Keywords:Boundary layer instabilities, laminar-turbulent transition, fundamental and subharmonic transition type, artificial excitation, Particle Image Velocimetry, flow visualization
Event Title:Seventh Internation Symposium on Application of Laser Techniques to Fluid Mechanics, 10.7.-15.7.94, Lissabon, Portugal
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: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:08

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