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Micro-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 Rondot, C. and Nsimba, M. and Geissler, Wolfgang (2005) Micro-PIV and ELDV wind tunnel investigations of the laminar separation bubble above a helicopter blade tip. Measurement, Science and Technology, pp. 1-13. Institute of Physics Publishing.

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Abstract

Studies of the boundary layer profile and of 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 leading 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:Article
Title:Micro-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
Rondot, C.CNRS
Nsimba, M.CNRS
Geissler, WolfgangUNSPECIFIED
Date:2005
Journal or Publication Title:Measurement, Science and Technology
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:pp. 1-13
Publisher:Institute of Physics Publishing
Status:Accepted
Keywords:micro-PIV, ELDV, dynamic stall, separation bubble, blade tip
HGF - Research field:Aeronautics, Space and Transport (old)
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:25 Jan 2006
Last Modified:14 Jan 2010 20:48

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