Analytical and numerical solutions to classical rotor designs

About a century ago, two different rotor models were proposed by Joukowsky (1912–1918) and Betz (1919). Both based on assumptions regarding the vortex structures of wake its induction plane. However, due to complications formulating behavior into actual guidelines for aerodynamic design geometry, have until now not been used industrial wind turbine rotors. In this article, we propose technique solve analytically problem models, which enables We briefly present theory behind show how can be exploited make designs planforms, i.e. chord- twist-distributions. The are three-bladed rotors optimized tip speed ratios analyzed comparing their performance results using blade-element/momentum lifting line theory.