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Evaluation and Parameter Variation of Leading Edge Vortex Generators for Dynamic Stall Control on an OA209 Rotor Blade Section

Mai, Holger and Dietz, Guido (2007) Evaluation and Parameter Variation of Leading Edge Vortex Generators for Dynamic Stall Control on an OA209 Rotor Blade Section. DLR-Interner Bericht. DLR IB 232-2006 J 03, 35 S.

Full text not available from this repository.

Abstract

A new concept of passive dynamic-stall control was developed and tested on an OA209 rotorcraft airfoil during two wind-tunnel test campaigns in 2004 and 2005. Small vortex generators are mounted at the leading edge of the rotor blade. At low incidence they are located close to the stagnation point and do not impact the flow field. At high angles of attack the so-called Leading Edge Vortex Generators (LEVoGs) induce longitudinal vortices which impact the suction side flow. It is shown that the use of LEVoGs can significantly increase the overall time-averaged lift while an unwanted negative pitching-moment peak is reduced compared with the clean-wing case. Furthermore, overall drag is reduced at dynamic-stall conditions. This report summarizes the performed parameter variations and documents the test points.

Item URL in elib:https://elib.dlr.de/50026/
Document Type:Monograph (DLR-Interner Bericht)
Title:Evaluation and Parameter Variation of Leading Edge Vortex Generators for Dynamic Stall Control on an OA209 Rotor Blade Section
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mai, HolgerUNSPECIFIEDUNSPECIFIED
Dietz, GuidoUNSPECIFIEDUNSPECIFIED
Date:23 March 2007
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:35
Status:Published
Keywords:Leading Edge Vortex Generator, dynamic stall
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft (old)
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Active Rotorcraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:23 Jul 2007
Last Modified:27 Apr 2009 14:05

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