(19)
(11) EP 1 985 920 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
27.04.2016 Bulletin 2016/17

(43) Date of publication A2:
29.10.2008 Bulletin 2008/44

(21) Application number: 08007935.3

(22) Date of filing: 24.04.2008
(51) International Patent Classification (IPC): 
F23C 3/00(2006.01)
 F23R 3/28(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 26.04.2007 JP 2007116305
31.03.2008 JP 2008089154

(71) Applicant: Mitsubishi Hitachi Power Systems, Ltd.
Yokohama 220-8401 (JP)

(72) Inventors:
  • Miura, Keisuke
    Chiyoda-ku Tokyo 100-8220 (JP)
  • Inoue, Hiroshi
    Chiyoda-ku Tokyo 100-8220 (JP)
  • Koyama, Kazuhito
    Chiyoda-ku Tokyo 100-8220 (JP)
  • Saito, Takeo
    Chiyoda-ku Tokyo 100-8220 (JP)

(74) Representative: MERH-IP Matias Erny Reichl Hoffmann Patentanwälte PartG mbB 
Paul-Heyse-Strasse 29
80336 München
80336 München (DE)

   


(54) Combustor and a fuel suppy method for the combustor


(57) It is an object of the present invention to maintain flame stability in a combustor using coaxial jets even if NOx is further reduced.
A combustor (100) includes a chamber (1) mixing and burning fuel and air; an air hole plate (50) disposed on a wall surface of the chamber (1), the air hole plate (50) including a plurality of rows disposed concentrically of a plurality of air holes (51) jetting coaxial jets of fuel and air into the chamber (1); and a first fuel nozzle (42) and a second fuel nozzle (43) disposed near a fuel hole jetting fuel into an air hole row on an inner peripheral side, the first fuel nozzle (42) being structured to suppress turbulence of a surrounding air flow and the second fuel nozzle (43) being structured to promote turbulence of a surrounding air flow.
In accordance with the aspect of the present invention, good flame stability can be maintained even by further reducing NOx in a combustor using coaxial jets.







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