(19)
(11)EP 2 216 599 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
21.05.2014 Bulletin 2014/21

(43)Date of publication A2:
11.08.2010 Bulletin 2010/32

(21)Application number: 09176679.0

(22)Date of filing:  20.11.2009
(51)International Patent Classification (IPC): 
F23R 3/10(2006.01)
F23R 3/34(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 MK MT NL NO PL PT RO SE SI SK SM TR
Designated Extension States:
AL BA RS

(30)Priority: 04.02.2009 US 365382

(71)Applicant: General Electric Company
Schenectady, NY 12345 (US)

(72)Inventors:
  • Ziminsky, Willy Steve
    Simpsonville, SC 29681 (US)
  • Johnson, Thomas Edward
    Greer, SC 29650 (US)
  • Lacy, Benjamin Paul
    Greer, SC 29650 (US)
  • York, William David
    Greer, SC 29650 (US)
  • Uhm, Jong Ho
    Simpsonville, SC 29681 (US)
  • Zuo, Baifang
    Simpsonville, SC 29681 (US)

(74)Representative: Cleary, Fidelma et al
GPO Europe GE International Inc. The Ark 201 Talgarth Road Hammersmith
London W6 8BJ
London W6 8BJ (GB)

  


(54)Premixed direct injection nozzle


(57) A fuel/air mixing tube (130) for use in a fuel/air mixing tube bundle (121) is provided. The fuel/air mixing tube (130) includes an outer tube wall (201) extending axially along a tube axis between an inlet end (134) and an exit end (135), the outer tube wall (201) having a thickness extending between an inner tube surface (203) having a inner diameter and an outer tube surface (202) having an outer tube diameter. The tube (130) further includes at least one fuel injection hole having a fuel injection hole (142) diameter extending through the outer tube wall (201), the fuel injection hole (142) having an injection angle relative to the tube axis. The invention provides good fuel air mixing with low combustion generated NOx and low flow pressure loss translating to a high gas turbine efficiency, that is durable, and resistant to flame holding and flash back.







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