Patent ID: 7488156

Claim:
A turbine airfoil, comprising: a generally elongated hollow airfoil formed from an outer wall, and having a leading edge, a trailing edge, a pressure side, and a suction side; an interlayer coupled to an outer surface of the outer wall of the generally elongated airfoil, wherein the interlayer is formed from a material such that cooling fluids may pass through the interlayer; a floating wall coupled to an outer surface of the interlayer; a cooling system comprising: at least one central cooling fluid supply chamber; at least one outer wall diffusion chamber positioned in the outer wall of the generally elongated airfoil and in fluid communication with the at least one central cooling fluid supply chamber through at least one first metering hole in the outer wall extending between the at least one outer wall diffusion chamber and the at least one central cooling fluid supply chamber; at least one cooling channel extending between the at least one outer wall diffusion chamber and the interlayer; and wherein the floating wall comprises at least one film cooling hole in the floating wall for enabling cooling fluids to be exhausted from the cooling system.