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Dynamic Stall on a Fully Equipped Helicopter Model

Kindler, Kolja and Mulleners, Karen and Schneider, Oliver and Raffel, Markus (2010) Dynamic Stall on a Fully Equipped Helicopter Model. 36th European Rotorcraft Forum, 07.-09. Sept. 2010, Paris, France.

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Official URL: http://www.erf2010.org/


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 location of the axes of small-scale shear layer vortices that constitute the dynamic stall vortex were extracted. Based on the spatial distribution of these small-scale vortices, the characteristic largescale structure was found to be unexpectedly compact. Along with an apparent spanwise flexion of the dynamic stall vortex, these results suggested the rotational motion to have a stabilising effect on the formation and convection of this predominant feature. The velocity field information which is now available is also believed to be valuable for validation of recent computational fluid dynamics investigations of three-dimensional dynamic stall.

Document Type:Conference or Workshop Item (Speech)
Title:Dynamic Stall on a Fully Equipped Helicopter Model
AuthorsInstitution or Email of Authors
Kindler, Koljakkindler@mpi-bremen.de
Mulleners, Karenkaren.mulleners@dlr.de
Schneider, Oliveroliver.schneider@dlr.de
Raffel, Markusmarkus.raffel@dlr.de
Refereed publication:No
In ISI Web of Science:No
Series Name:CD-ROM Conference Proceedings
Keywords:Dynamic Stall, helicopter rotor, PIV
Event Title:36th European Rotorcraft Forum
Event Location:Paris, France
Event Type:international Conference
Event Dates:07.-09. Sept. 2010
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 Active Rotorcraft (old)
Location: Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Flight Systems > Rotorcraft
Deposited By: Karen Mulleners
Deposited On:08 Nov 2010 07:27
Last Modified:08 May 2014 23:17

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