Three stream, variable area fixed aperture nozzle with pneumatic actuation
AssigneeRolls-Royce North American Technologies Inc.
InventorsAnthony F. Pierluissi, Kenneth M. Pesyna
Life of this patent
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Abstract
An exemplary nozzle having a variable internal exhaust area for a gas turbine engine can have a plurality of flap trains extending around a periphery of the gas turbine engine. Each flap train can include a convergent flap pivotally attached to an engine body and a divergent flap pivotally attached to the engine body downstream of the convergent flap. The nozzle can further have a fluid circuit in communication with the convergent and divergent flaps and configured to pivot the convergent and divergent flaps between a radially inward position and a radially outward position.
Claims20
A variable internal exhaust area nozzle for a gas turbine engine, comprising:
- a plurality of flap trains extending around a periphery of the gas turbine engine, with each flap train including a convergent flap pivotally attached to an engine body and a divergent flap pivotally attached to the engine body downstream of the convergent flap;
- and
- a fluid circuit in communication with the convergent and divergent flaps and configured to pivot the convergent and divergent flaps between a radially inward position and a radially outward position.
A variable internal exhaust area nozzle for a gas turbine engine, comprising:
- a plurality of flap trains extending around a periphery of the gas turbine engine, with each flap train including a convergent flap pivotally attached to an engine body and a divergent flap pivotally attached to the engine body downstream of the convergent flap;
- and
- a fluid circuit in communication with the convergent and divergent flaps and configured to pivot the convergent and divergent flaps between a radially inward position and a radially outward position;
- wherein the nozzle is configured to provide a combined fixed exit aperture.
A variable internal exhaust area nozzle for a gas turbine engine, comprising:
- a plurality of flap trains extending around a periphery of the gas turbine engine, with each flap train including a convergent flap pivotally attached to an engine body and a divergent flap pivotally attached to the engine body downstream of the convergent flap;
- and
- a fluid circuit in communication with the convergent and divergent flaps and configured to pivot the convergent and divergent flaps between a radially inward position and a radially outward position;
- wherein the nozzle defines a throat configured to pass a primary stream;
- wherein the nozzle further defines a series of variable area passages spaced apart from each other along a periphery of the throat;
- wherein the nozzle further defines a series of fixed area passages spaced apart from each other along the periphery of the throat, such that the nozzle is configured to bifurcate a third stream flow;
- and
- wherein the fluid circuit is one of a pneumatic circuit and a hydraulic circuit.
Dependencies are inferred from the claim text.