Patent ID: 9500369
Filing Date: 2016-11-22
CPC Classification: F02C,F23C,F23R

Claim Text:
1. A fuel nozzle for a combustor, the fuel nozzle comprising: an inner tube defining a first flow passage for flowing one of a fuel or an oxidizer therethrough, the inner tube comprising a first swirler device configured to impart a swirl on the one of the fuel or the oxidizer; an intermediate tube at least partially surrounding the inner tube and defining a second flow passage for flowing one of a fuel or an oxidizer therethrough, the intermediate tube comprising a second swirler device configured to impart a swirl on the one of the fuel or the oxidizer; an outer tube at least partially surrounding the intermediate tube and defining a third flow passage for flowing one of a fuel or an oxidizer therethrough, the outer tube comprising a third swirler device configured to impart a swirl on the one of the fuel or the oxidizer; and a plurality of igniter devices, wherein different ones of the plurality of igniter devices extend through a different one of the first flow passage, the second flow passage, or the third flow passage; wherein the inner tube includes a tip extending across the first flow passage, and wherein the first swirler device comprises a passage defined through the tip configured to impart a swirl on fuel flowing through the passage defined through the tip, wherein at least one of the first swirler device, the second swirler device, or the third swirler device comprises a plurality of swirler vanes, at least a portion of the swirler vanes configured to impart a swirl on the one of the fuel or the oxidizer, and wherein one of the first flow passage, the second flow passage or the third flow passage flows fuel therethrough, another of the first flow passage, the second flow passage or the third flow passage flows fuel therethrough, and a third of the first flow passage, the second flow passage or the third flow passage flows oxidizer therethrough, and wherein no fuel is flowed through the third of the first flow passage, the second flow passage or the third flow passage.