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Active Dynamic Flow Control Studies on Rotor Blades

Geissler, W. and Trenker, M. and Sobieczky, H. (2000) Active Dynamic Flow Control Studies on Rotor Blades. Research and Technology Agency, Spring 2000 Symposium on Active Control Technology, Braunschweig, 8-12 May, 2000.

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Abstract

Higher Harmonic Control (HHC) and Individual Blade Control (IBC) technologies have reduced noise and vibration levels of rotors considerably. Further improvements are expected with on-blade devices, i.e. the rotor blade is active only along a limited spanwise section of high aerodynamic efficiency. On both advancing and retreating sides of the rotor disc local supersonic areas terminated by shock waves play a dominant role with respect to separation (dynamic stall) and buffet (moving shock) problems.The present paper deals with new design methodologies to deform blade sections dynamically. The objective of airfoil deformation is to avoid strong shock waves which are responsible for shock induced separation (dynamic stall) on the retreating blade and which are the origin of high speed impulsive noise levels on the advancing blade. A combination of different software components available at DLR Institute of Fluid Mechanics, i.e. Geometry Generation Tools and 2D-Time Accurate Navier-Stokes Codes have already shown their strong potential for the development of dynamic flow control devices. This system will be used intensively in the present study and systematically applied to separation and shock control problems.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2001,
Title:Active Dynamic Flow Control Studies on Rotor Blades
Authors:
AuthorsInstitution or Email of Authors
Geissler, W.UNSPECIFIED
Trenker, M.UNSPECIFIED
Sobieczky, H.UNSPECIFIED
Date:2000
Status:Published
Event Title:Research and Technology Agency, Spring 2000 Symposium on Active Control Technology, Braunschweig, 8-12 May, 2000
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 20:59

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