Abstract
The maximum obtainable lift of a rotationally-oscillating airfoil is significantly higher than in the static or quasi-static case. The correct prediction of dynamic stall as the basis of the dynamically increased lift is essential to quantify the time-dependent load on the airfoil structure. This study applies unsteady RANS (URANS) and detached-eddy simulation (DES) with various turbulence models and parameter variations in order to capture the physics around an oscillating NACA0012 airfoil at a relatively high Reynolds number and to identify possible advantages and potential drawbacks of the given methods. The quality of the flow prediction is assessed primarily on the basis of integral force coefficients compared to experimental results, revealing the influence of resolution on maximum lift and the corresponding angle of incidence.
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Acknowledgments
The support of the EU within the DESider project (Detached Eddy Simulation for Industrial Aerodynamics — http://cfd.me.umist.ac.uk/desider), contract-no. AST3-CT-200-502842 and the IBM pSeries 690 of the North German cooperation for High-Performance Computing (HLRN) facility is gratefully acknowledged.
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Frederich, O., Bunge, U., Mockett, C., Thiele, F. (2009). Flow Prediction Around an Oscillating NACA0012 Airfoil at Re = 1,000,000. In: Braza, M., Hourigan, K. (eds) IUTAM Symposium on Unsteady Separated Flows and their Control. IUTAM Bookseries, vol 14. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-9898-7_5
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