Patent ID: 8002525

Claim:
A turbine airfoil, comprising: a generally elongated, hollow airfoil formed by an outer wall and having a leading edge, a trailing edge, a tip section at a first end, a root coupled to the airfoil at an end generally opposite the first end for supporting the airfoil and for coupling the airfoil to a disc, and a cooling system formed from at least one cavity in the elongated, hollow airfoil positioned in internal aspects of the generally elongated, hollow airfoil; at least one trailing edge cooling slot positioned within the generally elongated, hollow airfoil and extending from the trailing edge chordwise into the generally elongated, hollow airfoil toward the leading edge such that a secondary trailing edge is offset upstream from the trailing edge, wherein the at least one trailing edge slot is defined by a pressure side wall and an opposite suction side wall that each define a portion of the generally elongated, hollow airfoil such that a downstream opening of the at least one trailing edge cooling slot is positioned in the trailing edge of the airfoil; and wherein the cooling system includes a plurality of exhaust orifices positioned in the secondary trailing edge for exhausting cooling fluids from the cooling system.