Patent ID: 8128364
Filing Date: 2012-03-06
Classification: F03D,F05B,Y02E

Abstract:
1. A wind turbine blade, comprising: a pressure side, and a suction side, said pressure side and said suction side joined at a leading edge and a trailing edge and defining an internal cavity of said blade; a porous window defined in said suction side, said porous window comprising a plurality of openings that render said porous window permeable to airflow from within said internal cavity through said suction side; a deployable cover member configured with said porous window, said cover member variably positionable from a fully closed position wherein said plurality of openings are blocked to a fully open position wherein airflow is established through an entirety of said plurality of opening within said porous window; said deployable cover member configured for movement between said fully closed and said fully open positions in a plane that extends across said porous window essentially coextensive with said suction side; and an actuating mechanism disposed within said internal cavity and configured with said cover member to move said cover member between said fully closed and fully open positions in response to a control signal.