Airfoil with leading edge cooling

(19)

(11)

EP 0 924 384 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	23.08.2000 Bulletin 2000/34

(43)	Date of publication A2:
	23.06.1999 Bulletin 1999/25

(21)	Application number: 98310191.6

(22)	Date of filing: 11.12.1998

(51)	International Patent Classification (IPC)⁷: F01D 5/18

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

17.12.1997 US 992323

(71)	Applicant: UNITED TECHNOLOGIES CORPORATION
	Hartford, CT 06101 (US)

(72)	Inventors:
	Liang, George P. Palm City, Florida 34990 (US) Auxier, Thomas A. Palm Beach Gardens, Florida 33418 (US)

(74)	Representative: Leckey, David Herbert
	Frank B. Dehn & Co., European Patent Attorneys, 179 Queen Victoria Street London EC4V 4EL London EC4V 4EL (GB)

(54)	Airfoil with leading edge cooling

(57) A hollow airfoil (16) is provided which includes a body, a trench (30), and a plurality of cooling apertures (36) disposed within the trench (30). The body extends chordwise between a leading edge (26) and a trailing edge (29), and spanwise between an outer radial surface and an inner radial surface, and includes an exterior wall surrounding a cavity (20). The trench (30) is disposed in the exterior wall along the leading edge (26), extending in a spanwise direction.

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