Patent ID: 8317474

Claim:
An air cooled turbine airfoil comprising: a main spar having a pressure side wall surface and a suction side wall surface; a cooling air supply cavity formed in a forward end of the main spar; a thin thermal skin secured to the main spar to form an outer airfoil surface of the airfoil; a plurality of pressure side wall sinusoidal shaped ribs extending in a chordwise direction from the leading edge to the trailing edge of the airfoil and forming pressure wall side sinusoidal shaped cooling channels; a plurality of suction side wall sinusoidal shaped ribs extending in a chordwise direction from the leading edge to the trailing edge of the airfoil and forming suction wall side sinusoidal shaped cooling channels; a trailing edge cooling channel formed in a trailing edge region of the airfoil; and, the sinusoidal shaped ribs on the pressure wall side merging with the sinusoidal shaped ribs on the suction wall side with the two sinusoidal shaped ribs offset such that the cooling air flow mixes together.