Apparatus for mixing fuel in a gas turbine nozzle
AssigneeGeneral Electric Company
InventorCarl Robert Barker
Life of this patent
Estimating the term…
Abstract
A fuel nozzle in a combustion turbine engine that includes: a fuel plenum defined between an circumferentially extending shroud and axially by a forward tube-sheet and an aft tube-sheet; and a mixing-tube that extends across the fuel plenum that defines a passageway connecting an inlet formed through the forward tube-sheet and an outlet formed through the aft tube-sheet, the mixing-tube comprising one or more fuel ports that fluidly communicate with the fuel plenum. The mixing-tube may include grooves on an outer surface, and be attached to the forward tube-sheet by a connection having a fail-safe leakage path.
Claims20
A combustion turbine engine having a combustor that includes a fuel nozzle in which a supply of compressed air and fuel are mixed for combustion, wherein the fuel nozzle further includes:
- a fuel plenum defined between a circumferentially extending shroud and axially by a forward tube-sheet and an aft tube-sheet;
- and
- a mixing-tube that extends across the fuel plenum that defines a passageway connecting an inlet formed through the forward tube-sheet and an outlet formed through the aft tube-sheet, the mixing-tube comprising one or more fuel ports that fluidly communicate with the fuel plenum;
- wherein the mixing-tube comprises a plurality of grooves on an outer surface;
- and
- wherein the mixing-tube is attached to the forward tube-sheet along an interface that comprises a fail-safe leakage path.
A fuel nozzle for a combustor of a combustion turbine engine, the fuel nozzle comprising:
- a fuel plenum defined by a shroud that extends between a forward tube-sheet and an aft tube-sheet;
- a plurality of mixing-tubes, each of which defines an enclosed passageway extending across the fuel plenum from an inlet formed through the forward tube-sheet to an outlet formed through the aft tube-sheet, wherein each of the mixing-tubes includes a plurality of fuel ports that fluidly connects the enclosed passageway to the fuel plenum;
- wherein each of the mixing-tubes comprises a plurality of grooves formed on an outer surface, the plurality of grooves configured to increase a compliancy of each mixing-tube;
- and
- wherein the mixing-tube comprises a non-integral component to both the forward tube-sheet and the aft tube-sheet, wherein the mixing-tube is mechanically trapped therebetween via a first tip face of the mixing-tube engaging a recessed seat formed in the inlet and a second tip face of the mixing-tube engaging a recessed seat formed in the outlet.
Dependencies are inferred from the claim text.