Patent ID: 8317475

Claim:
An air cooled turbine airfoil comprising: a pressure side wall and a suction side wall; a leading edge region and a trailing edge region extending between the pressure side wall and the suction side wall; a first radial extending cooling channel located adjacent to the trailing edge region; a trailing edge region cooling channel formed between the pressure side wall and the suction side wall; a first row of metering holes connected between the radial extending cooling channel and the trailing edge region cooling channel; three rows of trip strips extending across the trailing edge region cooling channel; a row of axial ribs forming diffusion sections that open into exit slots on the pressure side wall adjacent to a trailing edge of the airfoil; three rows of pedestals connecting the rows of trip strips and forming a zip-zap shape; and, a row of exit holes connected to the exit slots and opening onto the trailing edge of the airfoil.