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Dynamic stall control by passive disturbance generators

Heine, Benjamin and Mulleners, Karen and Joubert, Gilles and Raffel, Markus (2011) Dynamic stall control by passive disturbance generators. 29th AIAA Applied Aerodynamics Conference, 27. - 30. Juni 2011, Honolulu, Hawai, USA.

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Abstract

Passive low-aspect ratio cylinders mounted near the leading edge of an airfoil have been found to significantly improve the performance under dynamic stall conditions. In order to clarify the principle of operation these cylindrical disturbance generators (DG), high speed PIV and simultaneous pressure measurements have been performed on the pitching rotary aircraft wing profile OA209. Time resolved information for the flow field at mid chord and the pressure distribution was taken. In addition to the best configuration found in previous experiments, various geometries and sizes of these devices have been investigated. The experiments showed the effectiveness of the disturbance generators in reducing the negative pitching moment peak and hysteresis effects. Moreover, the development of stall compared to the clean case has been investigated and it was found that the disturbance generators reduce the strength and the distance normal to the chord of the vortices.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Dynamic stall control by passive disturbance generators
Authors:
AuthorsInstitution or Email of Authors
Heine, Benjaminbenjamin.heine@dlr.de
Mulleners, Karenkaren.mulleners@dlr.de
Joubert, Gillesgilles.joubert@onera.fr
Raffel, Markusmarkus.raffel@dlr.de
Date:June 2011
Refereed publication:No
In ISI Web of Science:No
Page Range:pp. 1-14
Series Name:Conference Proceedings
Status:Published
Keywords:TR-PIV, Vortex generator, Dynamic Stall
Event Title:29th AIAA Applied Aerodynamics Conference
Event Location:Honolulu, Hawai, USA
Event Type:international Conference
Event Dates:27. - 30. Juni 2011
Organizer:AIAA
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 Virtual Aerodynamic Rotorcraft
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Deposited By: Benjamin Heine
Deposited On:19 Aug 2011 08:21
Last Modified:12 Dec 2013 21:19

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