ABSTRACT
In Chapter 4, the blade element momentum (BEM) theory was introduced as a means of assessing the performance of a new wind turbine rotor. The BEM method requires information on the blade radius, the variation of the rotor blade chord and blade twist as a function of the blade radius, as well as the airfoil section shapes used for the rotor, and their corresponding aerodynamic characteristics. To design a new rotor, one needs to know the amount of power the new rotor is designed to produce for a prescribed wind condition at a proposed site.
