CFD studies of the effect of holes and angles of upstream duct of horizontal axis wind turbines

This work presents an approach to the analysis of duct-augmented wind turbines using Computational Fluid Dynamics (CFD). The main objective is find optimum duct shape and design that gives maximum boost performance turbines. A surrounding rotor able increase power coefficient above Betz limit, so it has attracted great attention for many years. In this work, extensive augmented presented, considering influence various angles axial holes in diffuser on efficiency, which a new formulation far-wake velocity proposed. study consists two parts. first part compares experimental conventional turbine with identical modeled solved CFD. Once CFD results are validated, second parametric by integrating convergent different designs into model. reveals close agreement results. It found presence detrimental effect performance. However, angle enhanced performance, there was average output 96% 20°.