Abstract
The purpose of this study was to explore the effects of wind speed, airfoil thickness and setting angle of blades on the output performance of a VAWT system. Three shapes of the blades as NACA6422, NACA6412, and NACA6404 were fabricated and installed in the support mechanism to test the effect of airfoil thickness on the output performance. Results indicated that the section shape of blade with a cambered NACA 64XX series is prior to the ordinary symmetric NACA0022 series used in VAWT systems. The statistic analysis showed that the contribution of setting angle on the output performance is 12.27%, which is higher than that of thickness of airfoil as 2.93% when the extra load was applied on the VAWT system during tests. For application of VAWT systems in the densely populated urban areas, it is suggested that the blades with cambered airfoil of NACA6422 is suitable for electrical power generation.
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