AIRFOIL WITH FLOW DEFLECTOR

摘要

An airfoil (3) comprising a high pressure surface (4); a low pressure surface (5); a leading edge (6) where the high and low pressure surfaces meet at the front of the airfoil; and a trailing edge (7) where the high and low pressure surfaces meet at the back of the airfoil. A porous flow deflector (8) extends from the low pressure surface. The porous flow deflector is attached to the low pressure surface at a position which is closer in a chord-wise sense to the leading edge than to the trailing edge. That is, the percentage chord distance between the leading edge and the position where the flow deflector is attached is less than 50%. The porous flow deflector comprises a plurality of flow deflection members (8) each spaced progressively further from the low pressure surface in a direction away from the low pressure surface, and each flow deflection member is angled down to the rear relative to a local tangent of the low pressure surface. The porous flow deflector deflects air towards the low pressure surface as it passes through the porous flow deflector.