Abstract
The design of the rotor geometry of a vertical axis wind turbine (VAWT) type H, for power generation at low wind speeds, is presented. The computational simulation allowed us to establish that the NACA 0018 profile offers a better ratio of lift and drag coefficients in contrast to NACA 0021 and NACA 0025, so this geometry was selected as the working profile. Then, to generate a power of 30W, the dimensions of the airfoil chord, the radius, and the rotor's height were found from the blade tip speed ratio (TSR) values and the power coefficient. The results obtained indicate that the appropriate dimensions of the rotor at low-speed conditions are, a diameter of 2 m, a height of 2.16 m, and several blades of 3, for a rotation speed of 9 rad/s. Finally, an agreement was found between the angular velocity calculated theoretically, for the proposed rotor dimensions, and that obtained from the ANSYS-CFD simulation.
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