Fuel nozzle
AssigneePratt & Whitney Canada Corp.
InventorsYen-Wen WANG, Nigel DAVENPORT, Eduardo HAWIE
Life of this patent
Estimating the term…
Abstract
A fuel nozzle for a combustor of a gas turbine engine includes a body defining an axial direction and a radial direction, an air passageway defined axially in the body, and a fuel passageway defined axially in the body radially outwardly from the air passageway. The fuel passageway has an outer wall including an exit lip at a downstream portion of the outer wall. The exit lip has a surface treatment including a swirl-inducing relief. A gas turbine engine and a method of inducing swirl in at least one of pressurised fuel and air exiting a fuel nozzle of a gas turbine engine are also presented.
Claims20
A fuel nozzle for a combustor of a gas turbine engine, the fuel nozzle comprising:
- a body defining an axial direction and a radial direction;
- an air passageway defined axially in the body;
- a fuel passageway defined axially in the body radially outwardly from the air passageway, the fuel passageway having an outer wall including an exit lip at a downstream portion of the outer wall, the exit lip having a surface treatment including a swirl-inducing relief.
A gas turbine engine comprising:
- a combustor;
- and
- a plurality of fuel nozzles disposed inside the combustor, each of the fuel nozzles including:
- a body defining an axial direction and a radial direction;
- an air passageway defined axially in the body;
- a fuel passageway defined axially in the body radially outwardly from the air passageway, the fuel passageway having an outer wall including an exit lip at a downstream portion of the outer wall, the exit lip having a surface treatment including a swirl-inducing relief configured to induce swirl to at least one of pressurised air exiting the air passageway and pressurised fuel exiting the fuel passageway.
A method of inducing swirl in at least one of pressurised fuel and air exiting a fuel nozzle of a gas turbine engine, the method comprising:
- carrying pressurised air through an air passageway in the fuel nozzle and carrying pressurised fuel through a fuel passageway disposed radially outwardly from the air passageway in the fuel nozzle;
- and
- directing the pressurised fuel and the pressurised air through a swirl-inducing relief formed on an exit lip of the fuel passageway and inducing swirl in at least one of the pressurised air and the pressurised fuel, the exit lip being disposed at a downstream portion of an outer wall of the fuel passageway.
Dependencies are inferred from the claim text.