Power plants – Reaction motor – Particular exhaust nozzle feature
Reexamination Certificate
2011-06-28
2011-06-28
Cuff, Michael (Department: 3741)
Power plants
Reaction motor
Particular exhaust nozzle feature
C181S213000, C239S265170
Reexamination Certificate
active
07966826
ABSTRACT:
Jet engine nozzles with projections (e.g., chevrons) and injected flow, and associated systems and methods are disclosed. A method in accordance with one embodiment includes generating a first flow of gas with a jet engine, delivering the first flow through a nozzle having a trailing edge perimeter that includes multiple projections extending in an aft direction, and injecting a pressurized second flow of fluid into the first flow proximate to the projections. In other embodiments, other mixing enhancement devices (e.g., vortex generators) are carried by the projections. It is expected that the combination of the projections and the mixing enhancement devices will reduce engine exhaust noise levels below the levels achievable with either projections or injected flow individually.
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Alkislar Mehmet B.
Butler George W.
Reed David H.
Cuff Michael
Nguyen Andrew
Perkins Coie LLP
The Boeing Company
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