Acoustic treatment to mitigate fan noise

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United States of America Patent

PATENT NO 9957840
SERIAL NO

14760719

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Abstract

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A gas turbine engine has a propulsor including a fan and a liner positioned upstream of the fan. The liner has a backing plate, a cellular structure with cells extending from the backing plate, and a perforated sheet with a depth defined as a distance between the perforated sheet and the backing sheet. The depth is selected to achieve a desired ratio of the depth relative to a gap?. A depth to gap ratio is substantially in a range of 0.035 to 0.08. A method is also disclosed.

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Patent Owner(s)

Patent OwnerAddress
RTX CORPORATION10 FARM SPRINGS ROAD FARMINGTON CT 06032

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Morin, Bruce L Springfield, US 56 594
Ouellette, Thomas J Hebron, US 2 52
Prasad, Dilip Newbury Park, US 32 348
Topol, David A West Hartford, US 46 308

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