(19)
(11) EP 0 913 556 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.07.2000 Bulletin 2000/30

(43) Date of publication A2:
06.05.1999 Bulletin 1999/18

(21) Application number: 98308829.5

(22) Date of filing: 28.10.1998
(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: 31.10.1997 US 962128

(71) Applicant: GENERAL ELECTRIC COMPANY
Schenectady, NY 12345 (US)

(72) Inventors:
  • Chambers, Stephen Mark
    Cincinnati, Ohio 45242 (US)
  • Wygle, Thomas Gerard
    Loveland, Ohio 45140 (US)
  • Simmons, Robert Cooper
    Cincinnati, Ohio 45246 (US)

(74) Representative: Goode, Ian Roy et al
London Patent Operation General Electric International, Inc. Essex House 12-13 Essex Street
London WC2R 3AA
London WC2R 3AA (GB)

   


(54) Turbine blade cooling


(57) A blade (10) for a gas turbine engine is disclosed having several improved cooling features. The blade has a plurality of internal cooling passages. The blade has a tip cap aperture (46) and film cooling holes (20), arranged such that the rearmost cooling passage in the blade receives sufficient cooling in all areas to control local heating of the blade. The blade also has angled turbulence promoters to improve internal cooling and a specially shaped platform (14) to avoid heating of the blade platform edges.






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