Abstract
This paper aims to establish the comparison of performance between symmetrical (NACA 0012) and asymmetrical (NACA 4418) airfoils in the application of Wind Turbines. The CFD simulation is carried out in this experiment using Ansys software applying the one-equation Spalart Allmaras turbulence model. The pressure and velocity contours are evaluated and compared at different angles of attack at a fixed Reynolds number of 6 × 106, as it is a usual condition for wind turbine application. The lift coefficient (Cl), drag coefficient (Cd), and Cl/Cd are obtained at different angles of attack for both symmetrical and asymmetrical airfoils, and their performances have been compared. The pressure Coefficient is evaluated with respect to the chord length of the airfoils. These comparisons help us understand the best airfoil selection in a wind turbine application and the optimum angle of attack at which an airfoil performs at its best. This study also finds the angle of attack at which stalling condition initiates.
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