Low-Speed Fan Noise Attenuation from a Foam-Metal Liner | Zendy

Daniel L. Sutliff | Zendy; Michael G. Jones | Zendy

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Low-Speed Fan Noise Attenuation from a Foam-Metal Liner

Author(s) -

Daniel L. Sutliff,

Michael G. Jones

Publication year - 2009

Publication title -

journal of aircraft

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.64

H-Index - 94

eISSN - 1533-3868

pISSN - 0021-8669

DOI - 10.2514/1.41369

Subject(s) - nacelle , attenuation , metal foam , noise (video) , inlet , noise reduction , rotor (electric) , noise control , acoustics , materials science , engineering , mechanical engineering , composite material , aluminium , computer science , physics , image (mathematics) , artificial intelligence , optics , turbine

A foam-metal liner for attenuation of fan noise was developed for and tested on a low-speed fan. This type of liner represents a significant advance over traditional liners, due to the possibility of placement in close proximity to the rotor. An advantage of placing treatment in this region is that the acoustic near field is modified, thereby inhibiting the noise-generation mechanism. This can result in higher attenuation levels than could be achieved by liners located in the nacelle inlet. In addition, foam-metal liners could potentially replace the fan rub strip and containment components, ultimately reducing engine components and thus weight, which can result in a systematic increase in noise reduction and engine performance. Foam-metal liners have the potential to reduce fan noise by 4 dB based on this study.

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