this project describe design optimization of winglets using ansys base analysis. in order to increase the use of wind energy, it is important to develop wind turbine rotor models with high rotation rates and power coefficients. modeling of wind turbine winglets using computational fluid dynamics (cfd) in order to better account for the fluid forces and aerodynamic analysis of the winglet at the tip of the rotor blade. in the horizontal axis wind turbine with three blades. hawt have their axis of rotation horizontal to the ground and almost parallel to the wind stream. the project will involve the modeling of wind turbine winglets using computational fluid dynamics (cfd) with turbulent models integrated in the simulation in order to better account for the fluid forces and aerodynamic analysis of the winglet at the tip of the rotor blade.