Wake Effect

Wind turbines extract energy from the wind and downstream there is a wake from the wind turbine, where wind speed is reduced.  As the flow proceeds downstream, there is a spreading of the wake and the wake recovers towards free stream conditions.  The wake effect is the aggregated influence on the energy production of the wind farm, which results from the changes in wind speed caused by the impact of the turbines on each other. It is important to consider wake effects from neighbouring wind farms and the possible impact of wind farms which will  be built in the future.