Shell-spar cooled airfoil having variable coolant passageway...

Details Shell-spar cooled airfoil having variable coolant passageway... Shell-spar cooled airfoil having variable coolant passageway...

F - Mech Eng,Light,Heat,Weapons

01

D

170/71

F01D 5/18 (2006.01)

Patent

CA 1193551

13 ABSTRACT OF THE DISCLOSURE The invention comprises a convection-cooled airfoil for a combustion turbine rotor blade or stator vane. The airfoil comprises an airfoil-shaped spar and a metallic shell bonded thereto, the spar and the shell defining therebetween a plurality of coolant passageways for convective cooling of the airfoil. The passageways are arranged with cross-sectional areas which gradually decrease in the downstream direction so that cooling air flow per unit area increases as the cooling air progresses through the passageways.

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