Marco Raciti Castelli and Ernesto Benini
Comparison of Two Airfoil Sections for Application in StraightBladed Darrieus VAWT
2644 - 2652
2011
5
12
International Journal of Aerospace and Mechanical Engineering
https://publications.waset.org/pdf/5493
https://publications.waset.org/vol/60
World Academy of Science, Engineering and Technology
This paper presents a model for the evaluation of
energy performance and aerodynamic forces acting on a small
straightbladed Darrieustype vertical axis wind turbine depending on
blade geometrical section. It consists of an analytical code coupled to
a solid modeling software, capable of generating the desired blade
geometry based on the desired blade design geometric parameters.
Such module is then linked to a finite volume commercial CFD code
for the calculation of rotor performance by integration of the
aerodynamic forces along the perimeter of each blade for a full period
of revolution.After describing and validating the computational
model with experimental data, the results of numerical simulations
are proposed on the bases of two candidate airfoil sections, that is a
classical symmetrical NACA 0021 blade profile and the recently
developed DU 06W200 nonsymmetric and laminar blade
profile.Through a full CFD campaign of analysis, the effects of blade
geometrical section on angle of attack are first investigated and then
the overall rotor torque and power are analyzed as a function of blade
azimuthal position, achieving a numerical quantification of the
influence of airfoil geometry on overall rotor performance.
Open Science Index 60, 2011