Patent ID: 7946815
Filing Date: 2011-05-24
Classification: F01D,F05D

Abstract:
1. An airfoil for a turbine of a gas turbine engine comprising: an outer structure comprising a first wall including a leading edge, a trailing edge, a pressure side, and a suction side; an inner structure comprising a second wall spaced from said first wall and at least one intermediate wall, said second wall and said at least one intermediate wall defining at least one pressure side supply cavity for receiving a cooling fluid to cool at least a portion of said pressure side of said first wall and at least one suction side supply cavity for receiving a cooling fluid to cool at least a portion of said suction side of said first wall; structure extending between said first and second walls so as to define first and second gaps between said first and second walls, said first gap extending from generally said leading edge of said first wall toward said trailing edge of said first wall and being defined at least in part by said pressure side of said first wall, and said second gap extending from generally said trailing edge of said first wall toward said leading edge of said first wall and being defined at least in part by said suction side of said first wall; said second wall including at least one first opening near said leading edge of said first wall and extending from said at least one pressure side supply cavity to said first gap and at least one second opening near said trailing edge of said first wall and extending from said at least one suction side supply cavity to said second gap, said at least one first opening being located only near said leading edge such that cooling fluid is only delivered to said first gap near said leading edge and said at least one second opening is located only near said trailing edge such that cooling fluid is only delivered to said second gap near said trailing edge; and said first wall comprising at least one first exit opening extending from said first gap through said pressure side of said first wall near said trailing edge so as to allow cooling fluid to exit said first gap near said trailing edge and at least one second exit opening extending from said second gap through said suction side of said second wall so as to allow cooling fluid to exit said second gap.