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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, Science Direct. DOI: 10.1016/j.ast.2011.03.013. ISSN 1270-9638.

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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.

Document Type:Article
Additional Information:Available online 8 July 2011
Title:Dynamic Stall on a Fully Equipped Helicopter Model
AuthorsInstitution or Email of Authors
Mulleners, Karenmulleners@tfd.uni-hannover.de, Leibniz Universität Hannover, Hannover
Kindler, KoljaMax Planck Institute for Marine Microbiology, Bremen
Journal or Publication Title:Aerospace Science and Technology
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Volume:Vol. 1
Page Range:pp. 72-76
Publisher:ELSEVIER, Science Direct
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: Karen Mulleners
Deposited On:24 May 2012 11:38
Last Modified:07 Dec 2015 02:23

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