Numerical investigation of 3D unsteady flow around a rotor of vertical axis wind turbine darrieus type H

This article presents an analysis of the complex and unsteady flow a ssociated with functioning rotor vertical axis wind turbine Darrieus - H. In this study, influence different numerical aspects on accuracy simulation around three straight blades in rotation is performed, which are effect turbulence modeling, effects mesh time step. The Delayed Detached Eddy Simulation (DDES) approach used. aim to describe analyze 3D predicted numerically considering arms like blade-arms interference, blade-wake interactions tip vortices. Two-dimensional simulations used preliminary configuration. Then, three-dimensional re performed t o p recisely determine characteristics aerodynamic associated operation rotor. field studied for several values speed ratio, dynamic quantities, such as torque power that presented analyzed. From results obtained, it clear SST K-ω model can be considered reliable prediction. A comparison performance showed coefficients very close experimental data from bibliography.