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A. Sedaghat ⇑, M. Mirhosseini, Aerodynamic design of a 300 kW horizontal axis wind turbine for province of Semnan, Energy Conversion and Management 63 (2012) 87–94.

Aerodynamic design of a 300 kW horizontal axis wind turbine for province of Semnan
A. Sedaghat ⇑, M. Mirhosseini
Department of Mechanical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
a b s t r a c t
In this research, Blade Element Momentum theory (BEM) is used to design a HAWT blade for a 300 kW
horizontal axis wind turbine. The airfoil is RISØ-A1-18, produced by RISØ National Laboratory, Denmark.
Desirable properties of this airfoil are related to enhancement of aerodynamic and structure interactions.
Design parameters considered here are wind tip speed ratio, nominal wind speed and diameter of rotor.
The nominal wind speed was obtained from statistical analysis of wind speed data from province of
Semnan in Iran. BEM is used for obtaining maximum lift to drag ratio for each elemental constitution
of the blade. Obtaining chord and twist distribution at assumed tip speed ratio of blade, the aerodynamic
shape of the blade in every part is specified which correspond to maximum accessible power coefficient.
The design parameters are trust coefficients, power coefficient, angle of attack, angle of relative wind,
drag and lift coefficients, axial and angular induction factors. The blade design distributions are presented
versus rotor radius for BEM results. The blade shape then can be modified for ease of manufacturing,
structural concerns, and to reduce costs.
Keywords: Horizontal axis wind turbine (HAWT); Aerodynamic design; BEM theory; Chord; Twist.


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