Abstract
The flow field around a horizontal-axis wind turbine is analyzed numerically by solving the flow governing equations namely Reynolds’s Averaged Navier-Stokes (RANS). The effect of wind velocity on the flow field and the wall static pressure coefficient was examined. The numerical results were compared with the available experimental measurements from the open literature to verify model predictions which showed reasonable agreement. Then, the numerical model was used to investigate the effect of wind turbine shroud on the flow field and the generated power from the wind turbine. A parametric study was performed to examine the effect of different shroud geometries on the flow and the velocity at wind turbine rotor. The flow field around wind turbine rotor was calculated for the proper geometry of the shroud, and the developed torque was obtained and consequently the generated power. The performance of the shrouded wind turbine was compared to that of the un-shrouded wind turbine, and it was found that a considerable increase in the generated power was obtained using the shroud.
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