Fuel systems and methods for purging
AssigneePratt & Whitney Canada Corp.
InventorsOwen Ho-Yin Wong, John Galas, Sean Durand
Life of this patent
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Abstract
A fuel system can include a first fuel circuit, a second fuel circuit, and an inert gas purge system operatively connected to both the first fuel circuit and the second fuel circuit to purge at least a portion of either or both of the first and/or second fuel circuit. The first fuel can be a liquid fuel and the second fuel can be a gaseous fuel. The first fuel circuit can include a first fuel manifold configured to fluidly communicate a first fuel supply with at least one dual fuel nozzles downstream of the first fuel manifold.
Claims9
A method of operating a dual-fuel aircraft engine, the method comprising:
- feeding a liquid fuel to a combustor of the aircraft engine via a liquid fuel circuit including a dual-fuel nozzle;
- feeding a gaseous fuel to the combustor of the aircraft engine via a gaseous fuel circuit including the dual-fuel nozzle;
- purging the gaseous fuel circuit of the dual-fuel aircraft engine with an inert gas during shutdown of the aircraft engine to prevent flashback;
- and
- purging the gaseous fuel circuit and the liquid fuel circuit simultaneously with the inert gas.
Dependencies are inferred from the claim text.