Gas-turbine burner for a gas turbine with purging mechanism for a fuel nozzle
AssigneeRolls-Royce Deutschland Ltd & Co KG
InventorsThomas Doerr, Leif Rackwitz, Waldemar Lazik
Life of this patent
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Abstract
A gas-turbine burner for a gas turbine includes a fuel nozzle 1 having several fuel exit holes 23, which are each connected to a fuel line 5, 7, 29, 30, through which fuel can be passed selectively Between individual fuel exit holes 23, different static pressures of the airflow are provided between fuel lines flown by fuel and fuel lines not flown by fuel.
Claims20
A burner for a gas turbine, comprising:
- a fuel nozzle having a plurality of fuel exit holes, each connected to a fuel line, through which fuel can be selectively passed, wherein certain ones of the fuel exit holes are selectively objected to different static pressures of airflow through the burner than others of the fuel exit holes interconnected with the certain ones to create a purging air flow through the fuel exit holes.
A method for draining fuel lines of a nozzle of a gas-turbine burner, comprising subjecting at least one group of fuel exit holes to a different static pressure than another group of interconnected fuel exit holes to create a purging airflow through the fuel exit holes.
A fuel nozzle, comprising a plurality of fuel exit holes selectively connectable between at least one line connected to a pressurized fuel supply for supplying fuel to the gas turbine from the fuel exit holes and an air supply for purging fuel from the at least one line.
A fuel nozzle, comprising:
- a first aperture set and a second aperture set, at least one of the aperture sets selectively connected to a fuel supply for supplying fuel to the gas turbine, at least one aperture of the first aperture set being flowingly connected by at least one line to at least one aperture of the second aperture set, the at least one line selectively supplying fuel to at least one of the apertures of the first and second aperture sets, the fuel nozzle configured and arranged to provide a higher air pressure at the at least one aperture of the first aperture set than at the at least one aperture of the second aperture set such that when a flow of pressurized fuel is shut-off to the at least one aperture set for supplying fuel, a pressure differential between the higher air pressure aperture and the lower air pressure aperture causes air to flow through the line between the higher air pressure aperture and the lower air pressure aperture to purge fuel from the line.
Dependencies are inferred from the claim text.