WIND TURBINE BLADE HAVING A FLOW GUIDING DEVICE WITH OPTIMISED HEIGHT

摘要

The invention discloses a wind turbine blade (10) with a flow guiding device (70) attached to a profiled contour (40, 42, 50) on a pressure side (52) of the blade. The flow guiding device extends along at least a longitudinal part of a transition region (32) of the blade and is arranged so as to generate a separation of airflow along at least a central longitudinal portion (71) of the flow guiding device from the pressure side of the blade at a point between the flow guiding device and a trailing edge (20) of the blade, when the blade is impacted by an incident airflow. The flow guiding device is arranged at a relative chordal position, seen from the leading edge of the blade, lying in an interval between 40% and 92%. The height of the flow guiding device to the profiled contour is at least 10% of a maximum thickness of the profiled contour for each transverse cross section.