Aerodynamic Performance of Vertical-Axis Wind Turbines

The nonstationary separated incompressible flows around Darrieus and Savonius rotors of vertical-axis wind turbines were investigated through computational simulation using the Reynolds averaged Navier–Stokes equations Spalart–Allmaras turbulence model. implicit finite-volume algorithm, basis which was artificial compressibility method, chosen to obtain numerical solution. series physical experiments for with varied numbers shapes blades performed. detailed visualization flow presented. turbulent surrounding studied, as a part these investigations, major phases vortex progress identified. For this purpose, three computer tests on aerodynamic power properties two buckets performed, their results are also influence tip-speed ratio, solidity, coefficients investigated. It has been demonstrated that increasing number from 104 106 causes rise in coefficient 0.15 up 0.5. maximum values moved away higher ratio 2 5 result decrease rotor solidity 1.0 0.33. greatest is 0.23 0.19.