High-Order Large Eddy Simulations of a Wind Turbine in Ducted and Open-Rotor Configurations

Abstract High-order large eddy simulations are performed to study the performance and flow fields of a ducted wind turbine (DWT) operating at different tip speed ratios. To evaluate effects duct, with same ratios also on corresponding open-rotor turbine. It is found that consistently obtains higher power outputs than counterpart, duct itself enhances turbulence blade trailing-edge vortices but weakens hub vortices. Flow bifurcation observed largest ratio identified be caused by blockage effects. Comparative both turbines under yaw angles. noticed configuration insensitive small angles maintains all Moreover, it wakes configurations recover more quickly as angle increases.