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Prediction of Transition and Compressibility Effects on Dynamic Stall over OA209 Airfoil

Jeon, S.E and Park, S.H. and Kim, C.J. and Richter, Kai and Geißler, Wolfgang (2012) Prediction of Transition and Compressibility Effects on Dynamic Stall over OA209 Airfoil. 1st Asian/Australian Rotorcraft Forum, 12. - 15. Feb. 2012, Busan, Südkorea.

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The effects of boundary-layer transition and compressibility were numerically predicted for an OA209 airfoil in dynamic stall conditions. Effects of reduced frequency and Mach number on the generation of separation bubbles were investigated. Leading edge separations were found to correlate with the compressibility, relating to the beginning and ending of the stall process. The local Mach number in the leading edge was seen to decrease as the reduced frequency increases. The development of the dynamic stall vortex correlated with the reduced frequency, relating to the strength of the unsteady effect and stall characteristics. It was also found that the laminar separation bubble influences the strength of unsteady effects during the lift overshoot and the reattachment process.

Document Type:Conference or Workshop Item (Speech)
Title:Prediction of Transition and Compressibility Effects on Dynamic Stall over OA209 Airfoil
AuthorsInstitution or Email of Authors
Jeon, S.EKonkuk University
Park, S.H.Konkuk University
Kim, C.J.Konkuk University
Geißler, WolfgangUNSPECIFIED
Date:13 February 2012
Refereed publication:No
In ISI Web of Science:No
Keywords:dynamic stall, OA209 airfoil, numerical simulation, separation, transition
Event Title:1st Asian/Australian Rotorcraft Forum
Event Location:Busan, Südkorea
Event Type:international Conference
Event Dates:12. - 15. Feb. 2012
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
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Deposited By: Kai Richter
Deposited On:02 Mar 2012 10:09
Last Modified:02 Mar 2012 10:09

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