Numerical investigation of air jets for dynamic stall control on the OA209 airfoil
Gardner, Anthony Donald and Richter, Kai and Rosemann, Henning (2011) Numerical investigation of air jets for dynamic stall control on the OA209 airfoil. CEAS Aeronautical Journal. Springer. DOI: 10.1007/s13272-011-0002-z.
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Official URL: http://www.springerlink.com/content/gp02x92232373161/
The design and numerical investigation of constant blowing air jets as fluidic control devices for helicopter dynamic stall control is described. Prospective control devices were first investigated using 3D RANS computations to identify effective configurations and reject ineffective configurations. Following this, URANS investigations on the dynamically pitching OA209 airfoil verified that configurations had been selected which reduced the peaks in pitching moment and drag while preserving at least the mean lift and drag from the clean wing. Two configurations using jets at 10% chord on the airfoil top were identified, and one configuration using a tangential slot at 10% chord on the airfoil top, with each configuration evaluated for two jet total pressures. For the best configuration, a reduction in the pitching moment peak of 85% and in the drag peak of 78% were observed, together with a 42% reduction in the mean drag over the unsteady pitching cycle.
|Title:||Numerical investigation of air jets for dynamic stall control on the OA209 airfoil|
|Journal or Publication Title:||CEAS Aeronautical Journal|
|In ISI Web of Science:||No|
|Keywords:||Helicopter blade, CFD, Flow control, Dynamic stall, Jets, TAU|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L RR - Rotorcraft Research|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L RR - Rotorcraft Research|
|DLR - Research theme (Project):||L - The Innovative Rotorcraft|
|Institutes and Institutions:||Institute of Aerodynamics and Flow Technology > Helicopters|
Institute of Aerodynamics and Flow Technology > High Speed Configurations
|Deposited By:||Dr. Anthony Gardner|
|Deposited On:||16 Aug 2011 12:48|
|Last Modified:||07 Feb 2013 20:10|
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