Abstract
In recent years,constructions of wind farms are promoted.The "wind farm" means a large-scale wind power generating facility and has many wind turbines in a site.In wind farms,wind passed through an upstream wind turbine,it is called "wake",may flow in a downstream wind turbine depending on the wind direction.In the wake,wind velocity decrease by energy extraction and wind turbulence increase.The wake causes power reduction and shortening of the downstream wind turbine life-span.We analysed the wake velocity field of horizontal axis wind turbine by using panel method.The comparison between analysis results and experimental data shows approximately agreement in the near wake field.We considered effects of yaw-misalignment and deduced wake deflection angle.
