Abstract
The straight-bladed vertical axis wind turbine (SB-VAWT) receives more attentions recently for its goodness of simple design, low cost and good maintenance. However, its starting performance is poor. To increase its starting torque, Savonius rotor was combined on the SB-VAWT in this study because Savonius rotor has good starting torque coefficient. Based on the wind tunnel tests data, a small scaled combined type SB-VAWT (CSB-VAWT) which has 50W rated power output was designed. The starting torque coefficient, dynamic torque and power performance were analyzed. Both the starting and dynamic torque performance of the CSB-VAWT have been greatly improved according to the simulation results.
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