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.
Claims20
A fuel system, comprising:
- a combustor;
- a liquid fuel circuit selectively fluidly connected to the combustor via a liquid fuel manifold;
- a gaseous fuel circuit selectively fluidly connected to the combustor via a gaseous fuel manifold;
- and
- a gas source selectively fluidly connected to the gaseous fuel manifold.
A non-transitory computer readable medium comprising computer executable instructions, the instructions configured to cause a computer to perform a method, the method comprising:
- controlling a purge gas valve of a dual fuel system of an aircraft and a gaseous fuel valve of the dual fuel system to cause purging of a gaseous fuel circuit feeding a fuel to a dual fuel engine of the aircraft, the purging being performed with a gas from a gas supply of the aircraft.
A method comprising:
- purging a gaseous fuel circuit of a dual fuel engine of an aircraft fuel system with an inert gas purge system during startup and/or shutdown to prevent flashback.
Dependencies are inferred from the claim text.