Gas only fin mixer secondary fuel nozzle

Details Gas only fin mixer secondary fuel nozzle Gas only fin mixer secondary fuel nozzle

2005-05-31

2005-05-31

Casaregola, Louis J. (Department: 3746)

Power plants

Combustion products used as motive fluid

Combustion products generator

C060S742000

Reexamination Certificate

active

06898937

ABSTRACT:
A premix fuel nozzle and method of operation for use in a gas turbine combustor is disclosed. The premix fuel nozzle utilizes a fin assembly comprising a plurality of radially extending fins for injection of fuel and compressed air in order to provide a more uniform injection pattern. The fuel and compressed air mixes upstream of the combustion chamber and flows into the combustion chamber as a homogeneous mixture. The premix fuel nozzle includes a plurality of coaxial passages, which provide fuel and compressed air to the fin assembly, as well as compressed air to cool the nozzle cap assembly. An alternate embodiment includes an additional fuel injection region located along a conically tapered portion of the premixed fuel nozzle, downstream of the fin assembly. A second alternate embodiment is disclosed which reconfigures the injector assembly and fuel injection locations to minimize flow blockage issues at the injector assembly.

REFERENCES:
patent: 4982570 (1991-01-01), Waslo et al.
patent: 5199265 (1993-04-01), Borkowicz
patent: 6282904 (2001-09-01), Kraft et al.
patent: 6446439 (2002-09-01), Kraft et al.
patent: 6675581 (2004-01-01), Stuttaford et al.
patent: 6691516 (2004-02-01), Stuttaford et al.

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