24th Congress of International Council of the Aeronautical Sciences, 29 August-3, September 2004, Yokohama, Japan
Paper ICAS 2004-P.25

ON SOUND RADIATION FROM AN OPEN-ENDED NON-UNIFORMLY LINED CYLINDRICAL NOZZLE
L. M. B. C. Campos , J. M. G. S. Oliveira
Secção de Mecânica Aeroespacial, Instituto Superior Técnico, 1049-001 Lisboa Codex, Portugal
Keywords: duct, impedance, noise attenuation, sound radiation

Acoustic liners are widely used in jet engine inlet and exhaust ducts, as a passive means of noise reduction. The sound attenuation perceived by an observer in the far-field is arguably the most important effect to be achieved.

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24th Congress of International Council of the Aeronautical Sciences, 29 August-3, September 2004, Yokohama, Japan Paper ICAS 2004-P.25

ON SOUND RADIATION FROM AN OPEN-ENDED NON-UNIFORMLY LINED CYLINDRICAL NOZZLE

L. M. B. C. Campos , J. M. G. S. Oliveira Secção de Mecânica Aeroespacial, Instituto Superior Técnico, 1049-001 Lisboa Codex, Portugal

Keywords: duct, impedance, noise attenuation, sound radiation Acoustic liners are widely used in jet engine inlet and exhaust ducts, as a passive means of noise reduction. The sound attenuation perceived by an observer in the far-field is arguably the most important effect to be achieved.

view full paper

24th Congress of International Council of the Aeronautical Sciences, 29 August-3, September 2004, Yokohama, Japan
Paper ICAS 2004-P.25

L. M. B. C. Campos , J. M. G. S. Oliveira
Secção de Mecânica Aeroespacial, Instituto Superior Técnico, 1049-001 Lisboa Codex, Portugal

Keywords: duct, impedance, noise attenuation, sound radiation

Acoustic liners are widely used in jet engine inlet and exhaust ducts, as a passive means of noise reduction. The sound attenuation perceived by an observer in the far-field is arguably the most important effect to be achieved.