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|
|Date:||13 February 2012|
|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|
|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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