Design problem for Horizontal Axis Wind Turbine blades, using Lifting Line theory and Induction Factors
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Dantchev O. D., Design of HAWT Blades using Lifting Line Theory, M.Sc. Thesis, TU - Sofia, 1996
Z = number of blades
$ \Gamma $ = bound circulation
G = dimensionless bound circulation
$ x, r, \theta $ = cylindrical coordinates
V = wind speed
$ u_{a}, u_{t} $ = induced axial and tangental velocity, respectively