Numerical investigations on dynamic stall of low Reynolds number flow around oscillating airfoils |
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Authors: | Shengyi Wang Derek B Ingham |
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Affiliation: | a School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100191, China b Centre for CFD, University of Leeds, Leeds LS2 9JT, United Kingdom |
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Abstract: | This paper presents a 2D computational investigation on the dynamic stall phenomenon associated with unsteady flow around the NACA0012 airfoil at low Reynolds number (Rec ≈ 105). Two sets of oscillating patterns with different frequencies, mean oscillating angles and amplitudes are numerically simulated using Computational Fluid Dynamics (CFD), and the results obtained are validated against the corresponding published experimental data. It is concluded that the CFD prediction captures well the vortex-shedding predominated flow structure which is experimentally obtained and the results quantitatively agree well with the experimental data, except when the blade is at a very high angle of attack. |
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Keywords: | Dynamic stall Low Reynolds number Oscillating blade Aerodynamics SST k &minus ω turbulence model VAWT |
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