IDEA #9DVOQ8 Method for the controlled purging of the fuel feeding system in the combustor of a gas turbine engine

A method is described for the controlled purging of the fuel feeding system in the combustor of a gas turbine comprising at least one compressor (10), capable of compressing the air introduced into it through an inlet duct (12), at least one combustor (14), in which said compressed air is mixed and combusted with a gaseous fuel coming from a feeding duct (16), and at least one turbine (20), capable of transforming the energy of the combusted gas coming from said combustion chamber (14) into work energy which can be exploited for activating one or more operating machines (22). The combustor (14) is equipped with one or more burners (30), each equipped with at least one pilot injector (36) and one or more main injectors (38) for the adduction of the gaseous fuel inside the burner (30). The method comprises purging at least part of the main injectors (38) and relative manifolds (34) with a stream of gaseous fuel when the turbine is in diffusive flame functioning mode and purging the pilot injector (36) and relative manifold (32) with a stream of gaseous fuel when the turbine is in premixed flame functioning mode. https://app.acclaimip.com/pdf/285ayQbgugb0zlqs4-C6Cp88cHscdvEGamJpc9o/EP2072781A2