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μ-PIV and ELDV wind tunnel investigations of the laminar separation bubble above a helicopter blade tip

Raffel, Markus and Favier, D. and Berton, E. and Maresca, C. and Rondot, C. and Nsimba, M. and Geissler, Wolfgang (2005) μ-PIV and ELDV wind tunnel investigations of the laminar separation bubble above a helicopter blade tip. 6th International Symposium on Particle Image Velocimetry, 2005-11-21 - 2005-11-23, Pasadena, CA (USA).

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Abstract

Detailed studies of the boundary layer profile and the characteristics of the flow velocity distribution close to the leading edge of a helicopter blade profile were conducted using the embedded laser doppler velocimetry (ELDV) and stereo-PIV. The relatively small scales of flow structures related to dynamic stall, motivated an additional 2C-PIV study in which the flow field has been measured with a relatively high spatial resolution. The feasibility of PIV measurements utilizing a mirror telescope in a wind tunnel has been demonstrated successfully. The spatial resolution of approximately 50 μm allowed a judgment on the choice of turbulence models and damping coefficients for the improvement of CFD predictions.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:μ-PIV and ELDV wind tunnel investigations of the laminar separation bubble above a helicopter blade tip
Authors:
AuthorsInstitution or Email of Authors
Raffel, MarkusUNSPECIFIED
Favier, D.CNRS
Berton, E.CNRS
Maresca, C.CNRS
Rondot, C.CNRS
Nsimba, M.CNRS
Geissler, WolfgangUNSPECIFIED
Date:2005
Refereed publication:No
In ISI Web of Science:No
Status:Published
Keywords:micro-PIV, ELDV, dynamic stall, separation bubble, blade tip
Event Title:6th International Symposium on Particle Image Velocimetry
Event Location:Pasadena, CA (USA)
Event Type:international Conference
Event Dates:2005-11-21 - 2005-11-23
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Virtual Aerodynamic Rotorcraft
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Aerodynamics and Flow Technology > High Speed Configurations
Deposited By: Elisabeth Winkels
Deposited On:24 Jan 2006
Last Modified:06 May 2013 11:36

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