Patent ID: 7481623

Claim:
A turbine blade having a leading edge and a trailing edge, a pressure side and a suction side, and an internal cooling circuit to provide cooling for the blade, the blade comprising: A leading edge cooling circuit to provide cooling air to cool the leading edge portion of the blade; A trailing edge cooling circuit to provide cooling air to cool the trailing edge portion of the blade; A three-pass serpentine cooling circuit on the pressure side of the blade and located between the leading edge cooling circuit and the trailing edge cooling circuit, the first leg of the three-pass circuit being located adjacent to the leading edge cooling circuit, each of the three legs including a cooling hole to discharge cooling air onto the pressure side surface of the blade; A five-pass serpentine cooling circuit on the suction side of the blade and located between the leading edge cooling circuit and the trailing edge cooling circuit, the first leg of the five-pass circuit being located adjacent to the trailing edge cooling circuit, the third leg and the fifth leg each having a cooling hole therein to discharge cooling air onto the suction side surface of the blade; and, The four cooling circuits are not in fluid communication with each other within the blade.