Attenuation of FJ44 turbofan engine noise with a foam-metal liner installed over-the-rotor

15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference)

Volumn , Issue , 2009, Pages

  Sutliff, Daniel L ^a   Elliott, Dave ^a   Jones, Michael G ^b   Hartley, Thomas C ^c  

^a NASA GLENN RESEARCH CENTER   (United States)

^b NASA LANGLEY RESEARCH CENTER   (United States)

^c Williams International   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ACOUSTIC LEVELS; CLOSE PROXIMITY; ENGINE PERFORMANCE; FAR-FIELD; LINER DESIGN; METAL LINER; SINGLE-DEGREE-OF-FREEDOM; TEST SETS; TURBO-FAN ENGINE NOISE; WILLIAMS;

MACHINE DESIGN; METALS;

AEROACOUSTICS;

EID: 78149417169     PISSN: None     EISSN: None     Source Type: Conference Proceeding    
DOI: None     Document Type: Conference Paper

References (9)

1. Huff, D.L., "Noise Reduction Technologies for Turbofan Engines", Proceedings of Inter-Noise 2006, IN06 732, December 2006.
2. Sutliff, D.L. and Jones, M.G., "Foam-Metal Liner Attenuation of Low-Speed Fan Noise", AIAA-2008-2897, also NASA TM-2006-214368.
3. Lauer, J.T., McAllister, J, Loew, R.A., Sutliff, D.L., and Hartley, T.C., "FJ44 Turbofan Engine Test in the NASA Glenn Research Center's Aero-Acoustic Propulsion Laboratory", AIAA 2009-0620.
4. Aeroacoustics of Flight Vehicles: Theory and Practice - Volume 2: Noise Control, NASA RP-1258, Edited by H. H. Hubbard, August, 1991.
5. Jones, M.G., Parrott, T.L., Sutliff, D.L., and Hughes, C.E., "Design and Evaluation of Soft Vane and Metal Foam Noise Reduction Concepts", AIAA-2009-.
6. Chung, J.Y. and Blaser, D.A., "Transfer function method of measuring in-duct acoustic properties: I. Theory," Journal of Acoustical Society of America, Vol. 68, 1980, pp. 907-921.
7. Jones, M.G. and Parrott, T.L., "Evaluation of a multi-point method for determining acoustic impedance," Journal of Mechanical Systems and Signal Processing, Vol. 3, No. 1, 1989, pp. 15-35.
8. Smith, C.D. and Parrott, T.L., "Comparison of Three Methods for Measuring Acoustic Properties of Bulk Materials," Journal of Acoustical Society of America, Vol. 74, No. 5, 1983, pp. 1577-1582.
9. Cooper, B.A., "A Large Hemi-Anechoic Chamber Enclosure for Community-Compatible Aeroacoustic Testing of Aircraft Propulsion Systems", Journal of the Institute of Noise Control Engineering of the USA, Jan/Feb 1994.