Numerical investigations on double Savonius vertical axis wind turbines with a deflector: Effects of turbine and deflector-related parameters
Published in Energy Reports, 2025
This study numerically investigates the aerodynamic performance of double Savonius-type vertical axis wind turbines (VAWTs) equipped with a deflector, using computational fluid dynamics (CFD) simulations. The performance of the proposed configuration is compared with that of conventional Savonius turbines without a deflector.
Key turbine–deflector deployment parameters are systematically analyzed, including deflector shape, deflector size, deflector-to-turbine distance, and turbine-to-turbine distance. To efficiently assess the relative importance of these design variables, the Taguchi method is employed.
The results indicate that deflector shape and turbine-to-turbine distance have a more pronounced influence on turbine performance compared to other parameters. The findings provide practical design guidelines for enhancing the performance of Savonius VAWTs through optimized deflector-assisted configurations.
Recommended citation: Han, Y., Kim, E., & Oh, S. (2025). "Numerical investigations on double Savonius vertical axis wind turbines with a deflector: Effects of turbine and deflector-related parameters." Energy Reports, 14, 4950–4962.
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