INJECTOR NOSE FOR A TURBOMACHINE COMPRISING A PRIMARY FUEL CIRCUIT ARRANGED AROUND A SECONDARY FUEL CIRCUIT

摘要

An injector nose (43) for a turbomachine comprises a primary fuel circuit (62) terminated by a fuel ejection nozzle (66) opening onto an injection axis (44), and a secondary fuel circuit (64 ) comprising an annular fuel ejection end portion (68) arranged around the fuel ejection nozzle (66). An upstream part of the primary fuel circuit (62), housed in the injector nose (43), extends around the secondary fuel circuit (64). Because fuel thus circulates in the upstream part of the primary circuit (62) whatever the operating regime of the turbomachine, the upstream part of the primary circuit makes it possible to provide thermal protection and cooling of the injector nose, in particular the secondary circuit (64) around which extends the upstream part of the primary circuit (62). Figure for the abstract: Figure 3