Patent ID: 8414263

Claim:
A turbine stator vane comprising: an airfoil extending between an outer diameter endwall and an inner diameter endwall; a forward cooling air collector cavity and an aft cooling air collector cavity; a first radial extending cooling channel formed in a leading edge region wall of the airfoil; the first radial extending cooling air channel forming impingement cooling followed by film cooling a second radial extending cooling channel formed in a pressure side wall of the airfoil; the second radial extending cooling channel having endwall cooling followed by film cooling; a third radial extending cooling channel formed in a forward section of a suction side wall of the airfoil; the third radial extending cooling channel having convection cooling followed by impingement cooling followed by film cooling; a fourth radial extending cooling channel formed in an aft section of the suction side wall of the airfoil; and, the fourth radial extending cooling channel having convection cooling only followed by discharge into the aft cooling air collector cavity.