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Dynamic Stall on a Fully Equipped Helicopter Model

Mulleners, Karen and Kindler, Kolja and Raffel, Markus (2012) Dynamic Stall on a Fully Equipped Helicopter Model. Aerospace Science and Technology, Vol. 1 (1), pp. 72-76. Elsevier. doi: 10.1016/j.ast.2011.03.013. ISSN 1270-9638.

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Official URL: http://www.elsevier.com/locate/aescte


Three–dimensional dynamic stall was observed on the rotor of a fully equipped sub–scale helicopter model in a wind tunnel. Results of stereoscopic particle image velocimetry measurements on the retreating blade clearly revealed the large–scale dynamic stall vortex at 50% and 60% blade radius. The small-scale shear layer vortices that constitute the large–scale dynamic stall vortex were identified and localised. Based on the spatial distribution of these small–scale vortices, the characteristic large–scale structure was found to be unexpectedly compact. Along with an apparent spanwise flexion of the dynamic stall vortex, these results suggested the rotational motion of the rotor to have a stabilising effect on the formation and convection of the dynamic stall vortex. The velocity field information available provides a basis for validating recent computational fluid dynamics results of three–dimensional dynamic stall.

Item URL in elib:https://elib.dlr.de/66829/
Document Type:Article
Additional Information:Available online 8 July 2011
Title:Dynamic Stall on a Fully Equipped Helicopter Model
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Mulleners, Karenmulleners (at) tfd.uni-hannover.de, Leibniz Universität Hannover, HannoverUNSPECIFIED
Kindler, KoljaMax Planck Institute for Marine Microbiology, BremenUNSPECIFIED
Journal or Publication Title:Aerospace Science and Technology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Volume:Vol. 1
DOI :10.1016/j.ast.2011.03.013
Page Range:pp. 72-76
Series Name:Special Issue
Keywords:dynamic Stall, PIV, helicopter
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 of Aerodynamics and Flow Technology > Helicopters
Deposited By: Mulleners, Karen
Deposited On:24 May 2012 11:38
Last Modified:31 Jul 2019 19:29

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