Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1997-11-03
1998-11-24
Dang, Khanh
Acoustics
Sound-modifying means
Muffler, fluid conducting type
244134B, B64D 3302, B64D 1504
Patent
active
058410791
ABSTRACT:
058410796 In accordance with the present invention, in an air vehicle having a turbo engine including an inlet which receives intake airflow and is defined by an inner surface and a D-nose of the turbo engine, there is provided an inlet liner for improved acoustic, anti-ice and drag performance. The inlet liner is provided with a permeable acoustic layer formed to attenuate sound and defines the D-nose. The inlet liner is further provided with a pressurized fluid injecting device. The pressurized fluid injecting device is in fluid communication with the permeable acoustic layer and formed to inject fluid through the permeable acoustic layer at the D-nose to reduce drag of the intake airflow. The pressurized fluid injecting device is further formed to inject fluid through the permeable acoustic layer at a temperature sufficient to perform an anti-ice function at the D-nose.
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Anderson Terry J.
Dang Khanh
Hoch Jr. Karl J.
Northrop Grumman Corporation
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