Parametric study of hybrid Savonius-Darrieus turbine

The current work presents the study to predict the pressure and velocity field distributions for a hybrid two-bucket Savonius rotor and three blade egg-beater type Darrieus rotor vertical axis wind turbine using Fluent in ANSYS 15.0. Two cases of overlap conditions for the Savonius rotor i.e. 10.7% and 20.5% have been considered in this study. The Savonius rotor height is assumed approximately equivalent to rotor diameter and NACA 0012 airfoil cross-section has been considered for Darrieus rotor. Contours of relative velocity and static pressure have been obtained from simulation study and it has been observed that the high performance of the hybrid rotor can be attributed to the high relative speed observed in proximity of Darrieus rotor.