F - Mech Eng,Light,Heat,Weapons – 01 – D
Patent
F - Mech Eng,Light,Heat,Weapons
01
D
170/71
F01D 5/08 (2006.01) F01D 5/18 (2006.01) F02C 7/18 (2006.01)
Patent
CA 1122127
TRANSPIRATION COOLED BLADE FOR A GAS TURBINE ENGINE ABSTRACT OF THE DISCLOSURE A transpiration cooled blade for a gas turbine engine is assembled from a plurality of individual air- foil-shaped hollow ceramic washers stacked upon a ceramic platform which in turn is seated on a metal root portion. The airfoil portion so formed is enclosed by a metal cap covering the outermost washer A metal tie tube is welded to the cap and extends radially inwardly through the hollow airfoil portion and through aligned apertures in the platform and root portion to terminate in a threaded end disposed in a cavity within the root portion housing a tension nut for engagement thereby. The tie tube is hollow and provides flow communication for a coolant fluid directed through the root portion and into the hollow airfoil through apertures in the tube. The ceramic washers are made porous to the coolant fluid to cool the blade via transpiration cooling.
362053
Mcconnell And Fox
Westinghouse Electric Corporation
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