Abstract
In recent years, many wind farms, which mean a group of wind turbines constructed in the same site, are installed globally. In wind farms, energy deficit occurs when the downstream wind turbine operates in wakes generated by upstream wind turbines. Especially in large wind farms, the wakes overlap each other and it forms complex flow field due to the wake interference. In this study, wind speed distributions in wake generated by two test wind turbines were measured by wind tunnel experiment. A calculation model for overlapped wake is proposed and compared with the experimental results in order to clarify the wake interference effect.
