Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1996-09-09
1998-02-24
Dang, Khanh
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181220, 181292, 244207, 244130, B64D 3302, B64C 2106
Patent
active
057214026
ABSTRACT:
A noise suppression system for a jet engine, the system having a substrate formed of open cell material, a layer of microporous material covering at least a portion of one surface of the substrate, a layer of substantially non-porous material covering at least one portion of an opposite surface of the substrate, and a pressurized air source for providing pressurized air to the substrate. The substrate, the microporous material, and the non-porous material are configured to define an inner surface of an inlet for the jet engine. The pressurized air is communicated from the substrate, through the microporous material, and into the inlet so as to provide a layer of less turbulent airflow along the inner surface of the inlet, thus mitigating noise generation.
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Anderson Terry J.
Dang Khanh
Hoch Jr. Karl J.
Northrop Grumman Corporation
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