Method of impingement cooling a turbine airfoil and corresponding turbine airfoil

A method of impingement cooling a turbine airfoil (60) with a large platform (66) to airfoil fillet (74) radius which includes coring the airfoil fillet such that the fillet wall is maintained at a minimum thickness. An impingement tube (72) is used which follows the fillet contour as it transitions...

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Hauptverfasser: BRIDGES, JOSEPH W., JR, DEVORE, MATTHEW, PAAUWE, CORNEIL
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:A method of impingement cooling a turbine airfoil (60) with a large platform (66) to airfoil fillet (74) radius which includes coring the airfoil fillet such that the fillet wall is maintained at a minimum thickness. An impingement tube (72) is used which follows the fillet contour as it transitions from airfoil (60) to platform (66) and supplies impingement air to the airfoil walls. The air subsequently flows across the airfoil internal wall and finally exits the airfoil through airfoil holes (68) to provide film cooling to the airfoil fillet (64).