(19)
(11) EP 1 288 576 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.01.2004 Bulletin 2004/02

(43) Date of publication A2:
05.03.2003 Bulletin 2003/10

(21) Application number: 02016027.1

(22) Date of filing: 18.07.2002
(51) International Patent Classification (IPC)7: F23R 3/28, F23D 14/74, F23D 14/78
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 24.08.2001 JP 2001254360

(71) Applicant: Mitsubishi Heavy Industries, Ltd.
Tokyo (JP)

(72) Inventors:
  • Mandai, Shigemi, Mitsubishi Heavy Industries, Ltd.
    Takasago-shi, Hyogo-ken (JP)
  • Saitoh, Keijirou, Mitsubishi Heavy Industries, Ltd
    Takasago-shi, Hyogo-ken (JP)
  • Tanaka, Katsunori, c/o Mitsubishi Heavy Industries
    Takasago-shi, Hyogo-ken (JP)
  • Akizuki, Wataru, c/o Mitsubishi Heavy Industries
    Takasago-shi, Hyogo-ken (JP)

(74) Representative: Henkel, Feiler, Hänzel 
Möhlstrasse 37
81675 München
81675 München (DE)

   


(54) Gas turbine combustor


(57) A gas turbine combustor comprising a pilot nozzle (12) arranged on a central axis of said combustor and a plurality of pre-mixing nozzles (11) arranged around the pilot nozzle (12). A diameter of a combustion zone of the combustor is set such that, where an area is taken on a radial directional plane of the combustor, the area inside of the combustion zone and outside of a pitch circle (P) that is defined as a circle on which all central axes of the plurality of pre-mixing nozzles (11) are arranged, less the area taken by the plurality of pre-mixing nozzles (11) outside of the pitch circle (P), is a half or more of the area of all of the plurality of pre-mixing nozzles (11). With this structure, the flame holding ability of the combustor can be enhanced, the pilot fuel quantity can be reduced and a very low NOx generation can be realized.






Search report