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US 7,251,941 B2Granted
Ablative afterburner
AssigneeGeneral Electric Company
InventorsJohn Michael Koshoffer, Randy Lee Lewis
Life of this patent
Estimating the term…
Abstract
An afterburner includes an exhaust duct with a fixed area outer nozzle at an aft end thereof, and an ablative inner nozzle therein. The smaller inner nozzle is consumed during reheat operation to expose the larger outer nozzle for increased propulsion thrust.
Claims25
A gas turbine engine afterburner comprising:
- an exhaust duct having a fixed area outer nozzle at an aft end thereof;
- an ablative inner nozzle lining said outer nozzle;
- a flameholder mounted inside a forward end of said duct;
- and
- a fuel injector disposed in said flameholder for injecting fuel therein.
2 more elements
An afterburner according to claim wherein said ablative inner nozzle comprises a combustible material.
For a gas turbine engine including a compressor, combustor, and turbine, an afterburner comprising:
- a gas turbine engine exhaust duct having an inlet at a forward end thereof for receiving exhaust flow from said turbine, and having a fixed area outer nozzle at an aft end thereof;
- and
- an ablative inner nozzle lining said outer nozzle.
An afterburner comprising:
- an exhaust duct having a fixed area outer nozzle at an aft end thereof;
- an ablative inner nozzle lining said outer nozzle;
- said outer nozzle having an axial contour converging aft to an outer throat of minimum flow area and diverging aft to a nozzle outlet at an aft end of said outer nozzle;
- said inner nozzle having an axial contour converging aft to an inner throat smaller than said outlet throat and diverging aft to said nozzle outlet;
- a flameholder mounted inside a forward end of said duct;
- and
- a fuel injector disposed in said flameholder for injecting fuel therein.
4 more elements
Dependencies are inferred from the claim text.