Physics of Dynamic Stall Vortex During Pitching Oscillation of Dynamic Airfoil
نویسندگان
چکیده
Abstract Dynamic stall, which has a significant effect on the aerodynamic performances of dynamic airfoils, is closely related to physics stall vortex (DSV). The DSV NACA 0012 airfoil was experimentally studied using unsteady pressure measurements with high time accuracy. experimental Reynolds number Re = 1.5 × 10 6 , and reduced frequency k 0.069. propagation field during process analyzed in detail. motion characteristics were examined, including its near-wall development evolution velocity. Moreover, wavelet analysis combined proper orthogonal decomposition (POD) technology. In addition, effects mean angle attack (AoA) amplitude examined AoA strength velocity linear, while nonlinear. had influence leading-edge (LEV) at initial stage ( x / c 0.10–0.20). This work allows be understood more deeply. Graphic abstract
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ژورنال
عنوان ژورنال: International Journal of Aeronautical and Space Sciences
سال: 2021
ISSN: ['2093-274X', '2093-2480']
DOI: https://doi.org/10.1007/s42405-021-00389-5