Duct burning mixed flow turbofan and method of operation
AssigneeGeneral Electric Company
InventorsJames E. Johnson, Ronald B. Steinmetz
Life of this patent
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Abstract
A gas turbine engine includes a turbomachinery core operable to generating a first flow of pressurized combustion gases, the core having an exit plane; a fan disposed upstream of the core adapted to extract energy from the core and generate a first flow of pressurized air; a bypass duct surrounding the core which receives a portion of the flow of pressurized air from the fan; a duct burner disposed in the bypass duct, upstream of the exit plane, for receiving the first flow of pressurized air and generating a second flow of pressurized combustion gases; and an exhaust duct disposed downstream of the core and operable to receive and the first and second flows of pressurized combustion gases and to discharge the combined flows downstream.
Claims11
A gas turbine engine, comprising:
- (a) a turbomachinery core operable for generating a first flow of pressurized combustion gases, the core having an exit plane;
- (b) a fan disposed upstream of the core adapted to extract energy from the core and generate a first flow of pressurized air;
- (c) a bypass duct surrounding the core which receives a portion of the flow of pressurized air from the fan;
- (d) a duct burner disposed in the bypass duct, upstream of the exit plane, for receiving the first flow of pressurized air and generating a second flow of pressurized combustion gases;
- (e) an exhaust duct disposed downstream of the core and operable to receive the first and second flows of pressurized combustion gases and to discharge the combined flows downstream;
- and
- (f) a mixer for receiving the first and second flows of pressurized combustion gases and discharging the combined flows to the exhaust duct, wherein an open area of the mixer is selectively variable.
A gas turbine engine, comprising:
- (a) a turbomachinery core operable to generating a first flow of pressurized combustion gases, the core having an exit plane;
- (b) a fan disposed upstream of the core adapted to extract energy from the core and provide a first flow of pressurized air;
- (c) a bypass duct surrounding the core which receives a portion of the flow of pressurized air from the fan;
- (d) a duct burner disposed in the bypass duct, upstream of the exit plane, for generating a second flow of pressurized combustion gases;
- (e) an exhaust duct disposed downstream of the core and operable to receive the first and second flows of pressurized combustion gases and to discharge the combined flows downstream through a first exhaust nozzle disposed downstream of the exhaust duct;
- (f) a fan outer duct surrounding the bypass duct;
- (g) a flade stage comprising a supplementary fan disposed in the fan outer duct and driven by the fan for generating a second flow of pressurized air;
- and
- (h) a second exhaust nozzle disposed in the exhaust nozzle and adapted to discharge the second flow of pressurized air in a downstream direction.
Dependencies are inferred from the claim text.