| Summary: | The aerodynamic airfoil blades have a crucial influence on the wind turbine's
aerodynamic efficiency. Selecting an appropriate airfoil section for the blade is essential. The angle
of attack and its effect on lift and drag forces such as the high lift and low drag or vice versa are the
critical parameters that decide the efficiency of the wind turbine system. By taking this as a
motivation to the presented work, the NACA 4412 airfoil profile is considered to study the effect of
angle of attack on wind turbine blade's aerodynamic performance. According to national advisory
committee for aeronautics (NACA) standards, the airfoil geometry is generated through
computational fluid dynamics. The Simulation and analysis are performed for different angles of
attack ranging from 0° to 18° with an increment of 2° for low Reynolds number. In the present
research, the aerodynamic results are assessed in terms of static pressure and velocity distributions
alongside different angles of attack. In addition, coefficient of lift, coefficient of drag and lift/drag
ratio are also calculated and plotted against different angles of attack. From the CFD analysis, it is
concluded that as the angle of attack increases when the lift/drag ratio reduces. The NACA 4412
airfoil provides the highest performance at an angle of attack of 13.8°. However, other factors should
also be considered when assessing the aerodynamic performance of NACA airfoils, such as blade
backflow turbulence and blade forces.
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