Computational investigation of double stage vertical axis wind turbine

Abstract

In order to meet the growing demand for energy, wind energy can be one of the suitable options for generation of power. Savonius rotor, a type of Vertical axis wind turbine has the ability to accept wind from any direction and it is a low speed turbine. This makes it suitable in places where wind speed is relatively low and wind speed varies with season. But the main drawback of it is its low power coefficient. Thus, there is a need to improve its performance. The present study deals with computational investigation of the performance of a SST type single and double stage savonius rotor having holes at end plates. For designing and computational investigation, ANSYS-GAMBIT and ANSYS-WORKBENCH 19 software were used for comparison of power coefficient of both the rotors at different tip speed ratio. Double stage turbines showed better performance than single stage turbine.