Measurements behind model wind turbines: Further evidence of wake meandering

The frequency of wind turbine wake meandering was studied using wind turbine models with one, two and three blades. The one-bladed turbine did not give rise to any meandering motion, whereas meandering was observed for both the two- and three-bladed turbines at high enough rotational speeds. It was shown that both the thrust of the turbine and the tip-speed ratio influence the meandering. Copyright (C) 2007 John Wiley & Sons, Ltd.