Fuel system of gas turbine engines

F - Mech Eng,Light,Heat,Weapons – 02 – C

Patent

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Details

F02C 7/232 (2006.01) F02C 9/26 (2006.01)

Patent

CA 2643392

A method for purging fuel from a fuel system (28) of a gas turbine engine on shutdown of the engine comprises, in one aspect, terminating a fuel supply (76) to the fuel system and using the residual compressed air to create a reversed pressure differential in the fuel system relative to a forward pressure differential of the fuel system (28) used to maintain fuel supply (76) for engine operation, and under the reversed pressure differential substantially purging the fuel (78) remaining in the system (28) therefrom to a fuel source(32).

La présente invention concerne un procédé pour purger un carburant à partir d'un circuit d'alimentation (28) d'un moteur à turbine à gaz lors de l'arrêt du moteur qui comprend, dans un aspect, les étapes consistant à cesser d'alimenter en carburant (76) vers circuit d'alimentation et à utiliser l'air comprimé résiduel pour créer une pression différentielle inversée dans le circuit d'alimentation par rapport à une pression différentielle aval du circuit d'alimentation (28) utilisée pour maintenir l'alimentation en carburant (76) pour le fonctionnement de moteur, et, sous la pression différentielle inversée, à purger sensiblement le carburant (78) qui reste dans le circuit (28) à partir de ce dernier jusqu'à une source de carburant (32).

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