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US 6,971,229 B2Granted
Confluent exhaust nozzle
AssigneeThe NORDAM Group, Inc.
InventorJean-Pierre Lair
Life of this patent
Estimating the term…
Abstract
A gas turbine engine exhaust nozzle includes a nacelle having an inlet and main outlet at opposite ends, and a main duct extending therebetween. A secondary bypass duct extends radially through the nacelle upstream of the main outlet and includes an unobstructed secondary inlet joined to the main duct, and a secondary outlet surrounding the main outlet for collectively discharging exhaust flow in confluent streams.
Claims25
A gas turbine engine exhaust nozzle comprising:
- a nacelle having an inlet at a forward end, a main outlet at an axially opposite aft end, and a main duct extending therebetween;
- and
- a secondary bypass duct extending radially through said nacelle upstream of said main outlet, and having an unobstructed secondary inlet disposed continuously in flow communication with said main duct, and a secondary outlet surrounding said main outlet;
- and
- said main and secondary outlets being complementary in discharge flow area for collectively discharging in confluent streams the entire exhaust flow from said main duct.
2 more elements
A gas turbine engine exhaust nozzle comprising:
- a nacelle having an inlet at a forward end, a main outlet at an aft end, and a main duct extending therebetween;
- a secondary bypass duct extending radially through said nacelle upstream of said main outlet, and having an unobstructed secondary inlet disposed continuously in flow communication with said main duct, and a secondary outlet surrounding said main outlet for collectively discharging with said main outlet exhaust flow in confluent streams;
- and
- wherein said nacelle includes radially outer and inner skins bounding said secondary duct, with said outer skin terminating at said secondary outlet, and said inner skin extending aft therefrom to terminate at said main outlet.
1 more element
An exhaust nozzle for a turbofan gas turbine engine comprising:
- a nacelle having an inlet at a forward end, a main outlet at an axially opposite aft end, and a main duct extending therebetween;
- a secondary bypass duct extending radially through said nacelle upstream of said main outlet, and having an unobstructed secondary inlet disposed continuously in flow communication with said main duct, and a secondary outlet surrounding said main outlet;
- and
- said main and secondary outlets are sized in flow area to collectively discharge exhaust in only two corresponding confluent streams from said turbofan engine at the cruise design point thereof.
1 more element
Dependencies are inferred from the claim text.