Power plants – Reaction motor – Interrelated reaction motors
Patent
1996-06-05
2000-08-01
Freay, Charles G.
Power plants
Reaction motor
Interrelated reaction motors
244130, 244208, 181213, F02K 302
Patent
active
060949074
ABSTRACT:
A jet engine has a noise reduction system which reduces the boundary layer located on the outer surface of the nacelle. The noise reduction system includes a plurality of openings located in the outer surface of the nacelle which are in communication with a source of low pressure. The low pressure causes a reduction in the boundary layer at the openings so that resulting ambient air flow velocity near the nacelle surface is increased. This causes a reduction in the shearing between the secondary and ambient airflows thereby reducing the noise.
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Freay Charles G.
Sproule Robert H.
The Boeing Company
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