INJECTOR HEAD FOR GAS TURBINE ENGINE CONTAINING PRIMARY FUEL CIRCUIT AROUND SECONDARY FUEL CIRCUIT Russian patent published in 2023 - IPC F23R3/28 

FIELD: gas turbine engines.

SUBSTANCE: invention relates to an injector head for a gas turbine engine. The injector head (43) for a gas turbine engine contains a primary fuel circuit (62) ending in a fuel injection nozzle (66) and passing along the injection axis (44), and a secondary fuel circuit (64) containing an end fuel injection element (68) of an annular shape, located around the fuel injection nozzle (66), and the upstream part of the primary fuel circuit (62), located in the nozzle head (43), contains an annular channel (70) passing around the secondary fuel circuit (64) and limited by the outer wall (72) nozzle head, while the nozzle head additionally contains air inlet channels (126) passing through the annular channel (70) of the primary fuel circuit (62), having corresponding inlets (128) located on the outer wall (72), and corresponding outlet holes (130) extending into the annular air injection channel (124), while these air inlet channels pass radially inward relative to the final fuel injection element (68), around the fuel injection nozzle (66), and interact with the final fuel injection element (68) to form an aerodynamic secondary nozzles.

EFFECT: invention makes it possible to provide air injection between the primary and secondary nozzles.

11 cl, 10 dwg