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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.

Item URL in elib:https://elib.dlr.de/21710/
Document Type:Conference or Workshop Item (Speech)
Title:μ-PIV and ELDV wind tunnel investigations of the laminar separation bubble above a helicopter blade tip
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Raffel, Markusmarkus.raffel (at) dlr.dehttps://orcid.org/0000-0002-3340-9115
Favier, D.CNRSUNSPECIFIED
Berton, E.CNRSUNSPECIFIED
Maresca, C.CNRSUNSPECIFIED
Rondot, C.CNRSUNSPECIFIED
Nsimba, M.CNRSUNSPECIFIED
Geissler, WolfgangUNSPECIFIEDUNSPECIFIED
Date:2005
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS: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 (old)
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Virtual Aerodynamic Rotorcraft (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Institute for Aerodynamics and Flow Technology > High Speed Configurations, GO
Deposited By: Winkels, Elisabeth
Deposited On:24 Jan 2006
Last Modified:31 Jul 2019 19:16

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