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Numerical Investigation of Air Jets for Dynamic Stall Control on the OA209 Airfoil

Gardner, Anthony Donald and Richter, Kai and Rosemann, Henning (2010) Numerical Investigation of Air Jets for Dynamic Stall Control on the OA209 Airfoil. 36th European Rotorcraft Forum, 7. - 9. September 2010, Paris, France.

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The design and numerical investigation of constant blowing air jets as Fluidic Control Devices (FCDs) for helicopter dynamic stall control is described. Prospective control devices were first investigated using 3D RANS computations to identify effective configurations and reject ineffective configurations. Following this, URANS investigations on the dynamically pitching OA209 airfoil verified that configurations had been selected which reduced the peaks in pitching moment and drag while preserving at least the mean lift and drag from the clean wing. Two configurations using jets at 10% chord on the airfoil top were identified, and one configuration using a tangential slot at 10% chord on the airfoil top, with each configuration evaluated for two jet total pressures. For the best configuration, a reduction in the pitching moment peak of 85% and in the drag peak of 78% were observed, together with a 42% reduction in the mean drag over the unsteady pitching cycle.

Item URL in elib:https://elib.dlr.de/64642/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Numerical Investigation of Air Jets for Dynamic Stall Control on the OA209 Airfoil
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Refereed publication:No
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:No
Volume:Session 29
Series Name:CD-ROM Conference Proceedings
Keywords:helicopter, dynamic stall, flow control, OA209, TAU, URANS, RANS, air jets, FCD
Event Title:36th European Rotorcraft Forum
Event Location:Paris, France
Event Type:international Conference
Event Dates:7. - 9. September 2010
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 Virtual Aerodynamic Rotorcraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > High Speed Configurations
Deposited By: Gardner, Dr.habil. Anthony
Deposited On:04 Oct 2010 09:57
Last Modified:05 Nov 2010 14:27

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