Wind turbine blade with tipping device and method thereof

摘要

WIND TURBINE BLADE WITH TIPPING DEVICE AND METHOD The present invention relates to a wind turbine (1) and a method of reducing extreme loads and fatigue loads by using a passively activated tripping device (14) arranged on the pressure side (10) of the wind turbine blade (4). The tripping device (14) is configured to interrupt the passing airflow (12), when activated, and transform the airflow into a turbulent airflow. The tripping device (14) is positioned close to the leading edge, wherein its dimensions are optimised so that it reduces the maximum lift coefficient (17) as well as increases the minimum lift coefficient (18) which in turn reduces the range of the lift coefficient. The tripping device is activated at both negative and positive angle-of-attacks outside the normal operating range (19). (Fig. 4) Col