Sep 2026· Wind Engineering : The International Journal of Wind Power· 0 citations· 22 references
Abstract
This study evaluates the toroidal blade concept in horizontal-axis wind turbine design compared to conventional shapes. Both designs utilize the NACA 4412 airfoil, with the toroidal rotor featuring elliptical geometry. Three-dimensional transient CFD simulations using URANS equations and advanced turbulence models were conducted in ANSYS Fluent. Multiple Reference Frame and sliding mesh techniques captured dynamic vortex phenomena and turbine behavior. Parametric analysis identified 0.50 as the best looping ratio. The study emphasizes flow separation, tip vortices, and power efficiencies at a low Reynolds number regime (7 m/s). Validated against theoretical and experimental data, results suggest that the toroidal blade enhances the power coefficient, mitigates tip-vortex strength, and stabilizes unsteady flows. Specifically, the power coefficient increased by 22.5% over the conventional turbine at the optimum tip-speed ratio. These findings advance toroidal blade fluid dynamics and offer design guidelines for efficient wind energy harvesting.
The continuous upscaling of offshore wind turbines exacerbates challenges such as blade flutter, stability degradation, and logistical difficulties. To address these issues, this study proposes a parallel multi-rotor wind turbine and systematically investigates its aerodynamic performance and wake characteristics. Base...
This study investigates the influence of inclined surface cavities on vortex evolution and aerodynamic performance in a three-bladed H-Darrieus vertical-axis wind turbine. A baseline NACA0012 rotor and four cavity-modified configurations were evaluated using two-dimensional transient computational fluid dynamics with a...
I. Bucur, D. Crunteanu, M. Dombrovschi· INCAS Bulletin· 0 citations
This research is a numerical investigation into the two-dimensional configuration of a Savonius vertical axis wind turbine (VAWT) using computational fluid dynamics (CFD). Transient analysis has been performed on this turbine using rotatable domains in COMSOL Multiphysics to capture the unsteady aerodynamic characteris...
Baxtiyor Rustamov, Habibullo Goyibnazarov, Nodirabegim Rajabova et al.· EPJ Web of Conferences· 0 citations
This study accurately simulates a rotating wind turbine blade segment using an unsteady Reynolds-averaged Navier–Stokes model with physical mesh motion. This method is necessary to analyze transient inflow conditions such as yaw misalignment, wind shear, and gusts, which reduce blade lifespan. The simulation results we...
R. Jami, A. Zilstra, David A. Johnson· AIAA Journal· 0 citations
Boundary layer suction (BLS) mitigates flow separation and stall on horizontal-axis wind turbine (HAWT) blades by sucking low-momentum fluid from the suction surface, thereby enhancing aerodynamic performance. Three-dimensional numerical simulations of the National Renewable Energy Laboratory Phase VI wind turbine are...
R. Duan, Shuai Zhang, Xuan-Chen Liu et al.· The Physics of Fluids· 0 citations
We use cookies to run the site and, with your consent, for analytics and to show ads.
See our Cookie Policy.
