Abstract
This paper provides a set of key-design equations for the preliminary phase of choosing the most appropriate wind generator to meet a given load at a particular site with known wind distribution. Efforts have been made to present a compendium of the important and useful results of research and development pertaining to the aerodynamics of horizontal-axis wind turbines (HAWTs), which generate the largest possible power output. Interpolating polynomials that best fit numerous airfoil design data are evaluated with all parameters expressed in appropriate dimensionless form so as to make the formulas applicable to a variety of wind turbine configurations. The best blade taper and twist, which can conform to manufacturing and production requirements, are obtained from refined distributions to the calculated theoretical variations. The derived formulas incorporate the influences of the earth boundary layer as well as the tower interference with the oncoming wind. Finally a practical study case is implemented and discussed, showing the usefulness of the given formulas in designing an efficient wind generator suitable for a specific site and energy needs.
