Abstract
This study investigated the effects of tip-speed ratios λ on the flow characteristics around and performance of a cross-flow wind turbine. Two-dimensional computational fluid dynamics (CFD) simulations were performed for the flow field around the wind turbine. The CFD results confirmed that with an increase in λ, the torque generated by a blade was generally decreased on the upstream drive side due to the decrease in the relative wind speed against the blade. It was also confirmed that negative torque was generally increased on the upstream return side of the wind turbine due to the increase in the relative wind speed against the blade and in the scale and strength of the vortices trapped between the blades.
