Abstract A dual fuel burner assembly for a gas turbine engine has a fuel nozzle consisting of a central member in which ducts for the flow of liquid and gaseous fuel and a supply of air are formed and a shroud member. The outlets of the liquid fuel ducts communicate with the air supply ducts and the shroud member has a flared end formed with a number of equi-spaced slots which are aligned with the outlets of the gaseous fuel ducts. A supply of air is arranged to flow through the slots to stabilise the flow of gaseous fuel at low fuel flows. A heat shield is attached to the downstream face of the central member and the gap between the heat shield and the central member is in communication with the air supply ducts so that air can flow around the heat shield to prevent carbon deposition.
A fuel burner nozzle for a gas turbine engine, the nozzle including a central member having a plurality of ducts arranged to receive liquid fuel and a plurality of ducts arranged to receive a gaseous fuel, said gaseous fuel ducts and said liquid fuel ducts being alternately arranged around the periphery of said central member and all of said ducts being at substantially the same radial distance from the center of said central member, and a shroud member surrounding the central member, the shroud member having a plurality of slots aligned with the outlets of the gaseous fuel ducts, the slots extending longitudinally in a direction parallel with the centerline of the nozzle.
Claim 2
Dependent Claim
113 words
A fuel burner nozzle for a gas turbine engine, the nozzle including a central member having a plurality of ducts arranged to receive liquid fuel and a plurality of ducts arranged to receive a gaseous fuel, said gaseous fuel ducts and said liquid fuel ducts being alternately arranged around the periphery of said central member and all of said ducts being at substantially the same radial distance from the center of said central member, and a shroud member surrounding the central member, the shroud member having a plurality of slots aligned with the outlets of the gaseous fuel ducts, the slots extending longitudinally in a direction parallel with the centerline of the nozzle.
Claim 3
Dependent Claim
41 words
A fuel nozzle as claimed in claim 1 in which the downstream ends of the central member and the shroud member are flared outwardly to give the desired spray angle, the slots being formed in the flared end of the shroud.
Claim 4
Dependent Claim
52 words
A fuel nozzle as claimed in claim 1 in which a heat shield is attached to the downstream end of the nozzle and forms a recess in combination with the central member of the nozzle, and in which air supply ducts are formed in the central member in communication with the recess.