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Experimental Investigation of Air Jets for the Control of Compressible Dynamic Stall

Gardner, Anthony Donald and Richter, Kai and Mai, Holger and Neuhaus, Dietmar (2013) Experimental Investigation of Air Jets for the Control of Compressible Dynamic Stall. Journal of the American Helicopter Society, Vol. 58 (4), pp. 1-14. American Helicopter Society. doi: 10.4050/JAHS.58.042001. ISSN 0002-8711.

Full text not available from this repository.

Official URL: http://ingentaconnect.com/content/ahs/jahs/2013/00000058/00000004/art00001


The experimental investigation of constant blowing air jets as fluidic control devices for helicopter dynamic stall control is described. A carbon fiber airfoil of constant OA209 cross section was fitted with a pneumatic system to deliver dry compressed air as jets for flow control at total pressures of up to 10 bar. The experiment used porthole jets of radius 1% chord, positioned at 10% chord and with spacing 6.7% chord. The positive dynamic stall control effects were demonstrated at Mach 0.3, 0.4, and 0.5 for deep dynamic stall test cases with the best test cases reducing the pitching moment peak after the main stall by 83% while increasing the mean lift over one pitching cycle by 30%. The conclusions from the experiments are supported by three-dimensional unsteady Reynolds-averaged Navier–Stokes (URANS) computations of the pitching airfoil with flow control using the DLR-TAU code.

Item URL in elib:https://elib.dlr.de/84637/
Document Type:Article
Additional Information:Journal of the American Helicopter Society 58, 042001 (2013)
Title:Experimental Investigation of Air Jets for the Control of Compressible Dynamic Stall
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gardner, Anthony Donaldtony.gardner (at) dlr.deUNSPECIFIED
Richter, Kaikai.richter (at) dlr.deUNSPECIFIED
Mai, Holgerholger.mai (at) dlr.deUNSPECIFIED
Neuhaus, DietmarDietmar.Neuhaus (at) dlr.deUNSPECIFIED
Journal or Publication Title:Journal of the American Helicopter Society
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Volume:Vol. 58
DOI :10.4050/JAHS.58.042001
Page Range:pp. 1-14
Publisher:American Helicopter Society
Keywords:Dynamic Stall, Rotor blade, OA209, Flow control, air jets, DNW-TWG
HGF - Research field:Aeronautics, Space and Transport
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: Köln-Porz , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Materials Physics in Space
Institute of Aeroelasticity > Aeroelastic Experiments
Deposited By: Micknaus, Ilka
Deposited On:22 Oct 2013 09:24
Last Modified:08 Mar 2018 18:45

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