TRENCH COOLING OF AIRFOIL STRUCTURES

摘要

According to some embodiments, an airfoil 30 comprises at least one wall defining a leading edge 32, a trailing edge 34, a pressure side 38 extending between the leading edge and the trailing edge, and a suction side 36 extending between the leading edge and the trailing edge. The airfoil is curved in three dimensions and has one or more cavities 39 defined by an interior surface of the at least one wall. A plurality of cooling film holes 70 extending between the cavity and at least one cooling trench 50 located on at least one of the pressure side and the suction side, spaced from the leading edge. The at least one trench has a floor 60 spaced from an outer surface 31 of the airfoil. The plurality of cooling film holes extend through the floor at an angle other than perpendicular.