Autors: Velkova C.V., Dobrev I.K., Todorov, M. D., Massouh F.
Keywords: dynamic stall, unsteady aerodynamics, helicopter rotor, nume

Abstract: Aim to the computational study is to present different approach for numerical modeling of airfoil dynamic stall as the airfoil is pitched at a constant rate from zero incidences to a high angle of attack. An application of the Detached-Eddy Simulation model on a NACA 0012 airfoil is presented. The DES model is a method for predicting turbulence in CFD computations, which combines a Reynolds Averaged Navier-Stokes (RANS) method in the boundary layer with a Large Eddy Simulation (LES) in the free shear flow. (DES) turbulence model gives a good accuracy of the flow field because its solves an additional equation for turbulent Reynolds number in a shear stress transport version (SST), which solves a first equation for the turbulent energy K and a second equation for the specific turbulent dissipation rate w. The approach using DES turbulence model is effective because it gives better visualization of flow field, the unsteady separation flow and vortex shedding. Consequently the suggeste



    BulTrans-2012, 2012, Bulgaria, МП Издателство на ТУ-София, ISBN 1313-955Х

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    Цитирания (Citation/s):
    1. Ch.-Ch. Tseng and Y.-E. Cheng, Numerical investigations of the vortex interactions for a flow over a pitching foil at different stages, Journal of Fluids and Structures, 58 (2015) 291-318 - 2015 - в издания, индексирани в Scopus или Web of Science
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    Вид: публикация в национален форум