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Numerical investigation of aeroelastic and three dimensional effects for an airfoil in transonic flow

Surrey, Stefan and Gardner, Anthony Donald and Mai, Holger and Klein, Christian (2014) Numerical investigation of aeroelastic and three dimensional effects for an airfoil in transonic flow. ERF 2014 - 40th European Rotorcraft Forum, 02. - 05. Sept. 2014, Southhampton, England.

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Official URL: http://www.erf2014.com


Numerical investigations on an OA209 airfoil with flow control by air jets are compared with experiments at static conditions. RANS calculations for the DNW-TWG wind tunnel with a 1m x 1m adaptive-wall test section setup are performed to investigate the three-dimensional effects of this nominally two-dimensional configuration. Aeroelastic investigations of the midspan displacement, by coupling with a finite-element model of the airfoil at Ma = 0:4 and Re = 2:8 x 10^6 are in good agreement with deformation measurements by stereography. A small influence of the airfoil deformation on the aerodynamics can be seen in the numerical results, but the effect is less than the experimental uncertainty. A numerical investigation of flow control by air jets at the leading edge is presented for multiple static test cases at Ma = 0:3 and Re = 1:16 x 10^6. A variation of air jet pressure and its influence on stall suppression is shown to be in good agreement with experiments except in the case where no flow control is used (blowing pressure of zero). Surface pressure distributions are shown to be in good agreement with experimental pressure distributions from pressure sensitive paint..

Item URL in elib:https://elib.dlr.de/88374/
Document Type:Conference or Workshop Item (Speech)
Title:Numerical investigation of aeroelastic and three dimensional effects for an airfoil in transonic flow
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Surrey, StefanStefan.Surrey (at) dlr.deUNSPECIFIED
Gardner, Anthony Donaldtony.gardner (at) dlr.deUNSPECIFIED
Mai, Holgerholger.mai (at) dlr.deUNSPECIFIED
Klein, Christianchristian.klein (at) dlr.deUNSPECIFIED
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-11
Series Name:Conference Proceedings online
Keywords:aeroelastic, transonic flow, OA209 airfoil, Fluidic Control Devices (FCDs), DNW-TWG
Event Title:ERF 2014 - 40th European Rotorcraft Forum
Event Location:Southhampton, England
Event Type:international Conference
Event Dates:02. - 05. Sept. 2014
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
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 > Helicopters
Institute of Aeroelasticity > Aeroelastic Experiments
Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:06 Nov 2014 09:22
Last Modified:10 Mar 2015 09:35

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