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Experimental investigation of dynamic stall performance for the EDI-M109 and EDI-M112 airfoils

Gardner, Anthony Donald and Richter, Kai and Mai, Holger and Altmikus, A.R.M. and Klein, A and Rohart, Claas-Hinrik (2013) Experimental investigation of dynamic stall performance for the EDI-M109 and EDI-M112 airfoils. Journal of the American Helicopter Society, Vol. 58 (1), pp. 1-13. American Helicopter Society. doi: 10.4050/JAHS.58.012005.

Full text not available from this repository.

Official URL: http://dx.doi.org/10.4050/JAHS.58.012005


An experimental investigation of the dynamic performance of two new rotor blade airfoils was undertaken in a transonic wind tunnel. The EDI-M109 and EDI-M112 airfoils were tested at 0.3<M<0.5 for pitching motions with amplitude 0.5° to 8° and frequencies 3.3Hz<f<45Hz. The results show that both new airfoils have acceptable dynamic stall performance, and the effect of frequency, amplitude, and higher order pitching motion on these results is described. The pitching moment peak size was found to have an approximately linear correlation to the normalised mean angular velocity, and thus test cases with the same maximum angle of attack and oscillation frequency had similar dynamic stall qualities. The correlation between low aerodynamic damping for high frequency, low amplitude pitching motion and poor dynamic stall performance is shown to be low. The dynamic stall response of the EDI-M112 airfoil is shown to be better for M=0.3 and M=0.4, and the response of the EDI-M109 airfoil is better at M=0.5. The dynamic performance of the airfoils is compared to the OA209.

Item URL in elib:https://elib.dlr.de/80893/
Document Type:Article
Title:Experimental investigation of dynamic stall performance for the EDI-M109 and EDI-M112 airfoils
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Klein, AIAG, Uni. StuttgartUNSPECIFIED
Date:January 2013
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.58.012005
Page Range:pp. 1-13
Publisher:American Helicopter Society
Keywords:dynamic stall, helicopter, experiment, DNW-TWG, EDI-M109, EDI-M112, airfoil
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: Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Transport Aircraft
Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Aeroelasticity > Aeroelastic Experiments
Deposited By: Gardner, Dr.habil. Anthony
Deposited On:30 Jan 2013 16:24
Last Modified:08 Mar 2018 18:45

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