ANALISIS GAYA AERODINAMIKA PADA TURBIN ANGIN DARRIUS HROTOR TIPE TIGA SUDU.

Wind turbine blades have the working principle of converting wind energy into mechanical energy. The shape of the blade is influenced by the profile of the airfoil which has aerodynamic characteristics in the form of a moment coefficient (CM) that affects the performance of the aerodynamic force produced by the blade. This study aims to analyze the performance of H-Rotor wind turbine blades with NACA 0018, SELIG 1210, and FX 63-137 airfoil types using the Blade Element Theory method. The research method was carried out by testing the aerodynamic characteristics of airfoils in an open-circuit wind tunnel at a wind speed of 7.2 m/s. The analysis method was carried out by analyzing the drag force (FD), lift force (FL), normal force (FN), tangential force (FT) produced by each blade position. The position of the blade is influenced by the azimuth angle (θ) contained in each H-Rotor type wind turbine blade so that the value of the angle of attack changes at each blade position. The results of the analysis explain that tangential force affects the torque and power to be produced. The novelty of this study lies in a systematic approach in selecting the optimal airfoil based on a comprehensive analysis of aerodynamic forces, with a special focus on the comparison of air characteristics in various blade positions. The selection of NACA 0018 airfoil with an initial installation attack angle of 15° produces an average tangential force over one revolution of 502.2 Newtons, making it the right choice to use in a 3-blade H-Rotor wind turbine. [ABSTRACT FROM AUTHOR]