Nozzle for jet engines

A gas turbine engine comprising:

• an engine core configured to discharge a first stream of pressurized core air that is passed through the engine core,
• a fan coupled to the engine core to be driven by the engine core, the fan configured to discharge a second stream of pressurized bypass air and a third stream of pressurized bypass air that are passed around the engine core, and
• an exhaust system coupled to the engine core, the exhaust system including a primary-stream nozzle arranged to adjust the first stream of pressurized core air discharged from the engine core and the second stream of pressurized bypass air and including a third-stream nozzle arranged to adjust the third stream of pressurized bypass air,
• wherein the primary-stream nozzle includes a primary-stream duct wall, a plurality of forward primary-stream adjustment flaps mounted to pivot relative to the primary-stream duct wall to adjust a primary-nozzle-throat defined between the plurality of forward primary-stream adjustment flaps, and a plurality of aft primary-stream adjustment flaps mounted to pivot relative to the plurality of forward primary-stream adjustment flaps to adjust a primary-stream-nozzle outlet area defined between the plurality of aft primary-stream adjustment flaps,
• wherein the primary-stream nozzle includes one primary-stream-nozzle actuator coupled to at least one of the forward primary-stream adjustment flaps and configured to pivot the at least one of the forward primary-stream adjustment flaps relative to the primary-stream duct wall and another primary-stream-nozzle actuator coupled to at least one of the aft primary-stream adjustment flaps and configured to move the at least one of the aft primary-stream adjustment flaps relative to the at least one of the forward primary-stream adjustment flaps.

An exhaust system for a gas turbine engine, the exhaust system comprising:

• a primary-stream nozzle internal to an engine core of the gas turbine engine and arranged to adjust at least one of a primary stream of pressurized core air that is passed through and discharged from the engine core and a second stream of pressurized bypass air that is discharged from a fan of the gas turbine engine and passed around the engine core, and
• a third-stream nozzle external to the engine core and arranged to adjust a third stream of pressurized bypass air that is discharged from the fan and passed around the engine core,
• wherein the third stream of pressurized bypass air is adjustable via the third-stream nozzle based on adjustment of the at least one of the primary stream of pressurized core air and the second stream of pressurized bypass air via the primary-stream nozzle,
• wherein the primary-stream nozzle includes at least one primary-stream duct wall, a plurality of forward primary-stream adjustment flaps mounted to pivot relative to the at least one primary-stream duct wall to adjust a primary-nozzle-throat defined between the plurality of forward primary-stream adjustment flaps, a plurality of aft primary-stream adjustment flaps mounted to move relative to the plurality of forward primary-stream adjustment flaps to adjust an outlet area of the primary-stream nozzle defined between the plurality of aft primary-stream adjustment flaps, a first primary-stream-nozzle actuator coupled to at least one of the forward primary-stream adjustment flaps and configured to pivot the at least one of the forward primary-stream adjustment flaps relative to the primary-stream duct wall, and a second primary-stream-nozzle actuator coupled to at least one of the aft primary-stream adjustment flaps and configured to move the at least one of the aft primary-stream adjustment flaps relative to the at least one of the forward primary-stream adjustment flaps.