BLADE DESIGN CALCULATIONS BASED ON BLADE ELEMENT MOMENTUM THEORY OF HORIZONTAL AXIS WIND TURBINE FOR BAUCHI AND KATSINA STATES NIGERIA
In this study, we focus on the design calculation of a wind turbine blade based on blade element momentum theory by the means of improving the efficiency of a wind turbine performance for some cities in Nigeria. The aerodynamic aerofoils of a wind turbine blade are essential tools in influencing the aerodynamic efficiency of wind turbine generator. The Blade element momentum theory, involves the process of dividing a wind turbine blade into sectional aerofoil for the purpose of blade design. The NACA 4418 aerofoil profile is considered for the analysis of wind turbine blades. Q-blade software was used to obtain Lift and Drag Coefficient at 60 angles of attack. The blade design parameter such as twisted angle, blade setting angle, aerofoil thickness, chord length, and linearization of the chord length were all calculated and the blade was designed for each selected station. The results of this research can be used for the design and construction of wind turbine blades for the purpose of surface wind electrification.