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Multiple Plane Stereo PIV and its significance for turbulence research

Kähler, Ch. (1999) Multiple Plane Stereo PIV and its significance for turbulence research. Delft University of Technology, Laboratory for Aero and Hydrodynamics, Delft/Netherlands, 02. Februar 1999.

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Abstract

Particle Image Velocimetry (PIV) has become a widely used technique for investigations into fluid flow were the spatial distribution of the velocity helps to understand the physics of flow. However, quiet often other quantities are desirable to answer fluid-mechanical questions. Time resolved PIV measurements in air flows as well as the simultaneous determination of all three velocity components in spatially separated planes for example are desirable for many fluid-mechanical investigations. In order to measure these quantities a multiple plane stereo PIV system has been developed. The multiple plane stereo PIV system consists of a four pulse laser system delivering orthogonally polarized light, two pairs of high resolution progressive scan CCD cameras in an angular imaging configuration with Scheimpflug correction for stereo-scopic recording, two high reflectivity mirrors and a pair of polarizing beam-splitter cubes. This technique is very reliable, robust and well suited for all kinds research, purely scientific as well as for industrially motivated investigations in large wind tunnel. Instantaneous quantities as the vorticity or the invariants of the velocity gradient tensor and time-dependent quantities as space-time correlations or the acceleration can be obtained to characterize the spatial and temporal flow unsteadiness. In order to study the accuracy and reliability of the Multiple Plane Stereo system the transition to turbulence in a flat plate boundary layer flow with zero pressure gradient had been examined

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=1999,
Title:Multiple Plane Stereo PIV and its significance for turbulence research
Authors:
AuthorsInstitution or Email of Authors
Kähler, Ch.UNSPECIFIED
Date:1999
Status:Published
Keywords:Stereo PIV, Multiple Plane Stereo PIV, turbulence, vorticity, space-time correlations
Event Title:Delft University of Technology, Laboratory for Aero and Hydrodynamics, Delft/Netherlands, 02. Februar 1999
Organizer:Delft University of Technology, Laboratory for Aero and Hydrodynamics
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 20:33

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