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US 6,786,038 B2Granted
Duplex mixer exhaust nozzle
AssigneeThe NORDAM Group, Inc.
InventorJean-Pierre Lair
Life of this patent
Estimating the term…
Abstract
A turbofan engine exhaust nozzle includes cooperating outer and inner mixers. The outer mixer includes alternating outer lobes and outer chutes. The inner mixer includes alternating inner lobes and inner chutes. Forward ends of the outer and inner mixers are spaced radially apart, and aft ends of the mixers are joined together to define an outlet of the nozzle for discharging exhaust flow.
Claims27
An exhaust nozzle comprising:
- an outer mixer having a plurality of circumferentially alternating outer lobes and outer chutes extending axially between forward and aft ends thereof, with said outer lobes projecting radially outwardly, and said outer chutes extending radially inwardly;
- an inner mixer disposed coaxially inside said outer mixer, and having a plurality of circumferentially alternating inner lobes and inner chutes extending axially between forward and aft ends thereof, with said inner lobes projecting radially inwardly, and said inner chutes extending radially outwardly;
- and
- said outer and inner mixers being spaced radially apart from each other to define a plenum therebetween extending both circumferentially between a plurality of adjacent lobes and axially from said forward ends and terminating at said aft ends, with said aft ends of said outer and inner mixers being joined together to prevent flow discharge therebetween and to define a common outlet of said nozzle at said inner chutes for discharging exhaust flow.
1 more element
An exhaust nozzle comprising:
- an outer mixer having a plurality of circumferentially alternating outer lobes and outer chutes extending axially between forward and aft ends thereof, with said outer lobes projecting radially outwardly, and said outer chutes extending radially inwardly;
- a plurality of outer apertures disposed in said outer chutes;
- an inner mixer disposed coaxially inside said outer mixer, and having a plurality of circumferentially alternating inner lobes and inner chutes extending axially between forward and aft ends thereof, with said inner lobes projecting radially inwardly, and said inner chutes extending radially outwardly;
- and
- said forward ends of said outer and inner mixers being spaced radially apart, and said aft ends of said outer and inner mixers being joined together to define a common outlet of said nozzle for discharging exhaust flow.
2 more elements
An exhaust nozzle comprising:
- an annular fan nacelle surrounding a core cowling to define a fan duct therebetween for channeling fan exhaust flow;
- an outer mixer extending aft from an aft end of said fan nacelle, and having a plurality of circumferentially alternating outer lobes and outer chutes extending axially between forward and aft ends thereof, with said outer lobes projecting radially outwardly, and said outer chutes extending radially inwardly;
- an inner mixer extending aft from said nacelle aft end, and disposed coaxially inside said outer mixer, and having a plurality of circumferentially alternating inner lobes and inner chutes extending axially between forward and aft ends thereof, with said inner lobes projecting radially inwardly, and said inner chutes extending radially outwardly;
- and
- said forward ends, said outer and inner mixers being spaced radially apart, and said aft ends of said outer and inner mixers being joined together to prevent flow discharge therebetween and to define a common outlet of said nozzle at said inner chutes positioned around said core cowling for discharging exhaust flow.
2 more elements
Dependencies are inferred from the claim text.