%0 Journal Article %A Federico Amato and Gabriele Bedon and Marco Raciti Castelli and Ernesto Benini %D 2013 %J International Journal of Aerospace and Mechanical Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 78, 2013 %T Numerical Analysis of the Influence of Tip Devices on the Power Coefficient of a VAWT %U https://publications.waset.org/pdf/8087 %V 78 %X The aerodynamic performances of vertical axis wind turbines are highly affected by tip vortexes. In the present work, different tip devices are considered and simulated against a baseline rotor configuration, with the aim of identifying the best tip architecture. Three different configurations are tested: winglets, an elliptic termination and an aerodynamic bulkhead. A comparative analysis on the most promising architectures is conducted, focusing also on blade torque evolution during a full revolution of the rotor blade. The most promising technology is concluded to be a well designed winglet. %P 1053 - 1060