Dual fuel fin mixer secondary fuel nozzle

Details Dual fuel fin mixer secondary fuel nozzle Dual fuel fin mixer secondary fuel nozzle

2005-07-12

2005-07-12

Tyler, Cheryl (Department: 3746)

Power plants

Combustion products used as motive fluid

Combustion products generator

C060S039463, C060S740000

Reexamination Certificate

active

06915636

ABSTRACT:
A dual fuel premix nozzle and method of operation for use in a gas turbine combustor is disclosed. The dual fuel premix nozzle utilizes a fin assembly comprising a plurality of radially extending fins for injection of gas fuel and compressed air in order to provide a more uniform injection pattern and homogeneous mixture. The premix fuel nozzle includes a plurality of coaxial passages, which provide gaseous fuel and compressed air to the fin assembly. When in liquid fuel operation, the gas circuits are purged with compressed air and liquid fuel and water pass through coaxial passages to the tip of the dual fuel premix fuel nozzle, where they inject liquid fuel and water into the secondary combustion chamber. An alternate embodiment includes an additional gas 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 and simplify fuel nozzle manufacturing.

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