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Record 1 of 104
Nonlinear acoustic propagation in rectangular ducts
Author and Affiliation:
Nayfeh, A. H.
Tsai, M.-S.(Virginia Polytechnic Institute and State University, Blacksburg, Va., United States)
Abstract: The method of multiple scales is used to obtain a second-order uniformly valid expansion for nonlinear acoustic wave propagation in a rectangular duct whose walls are treated with a nonlinear acoustic material. The wave propagation in the duct is characterized by the unsteady nonlinear Euler equations. The results show that nonlinear materials attenuate sound more than linear materials except at high acoustic frequencies. The nonlinear materials produce higher and combination tones which have higher attenuation rates than the fundamentals. Moreover, the attenuation rates of the fundamentals increase with increasing amplitude.
Publication Date: Jan 01, 1974
Document ID:
19740051610
(Acquired Dec 04, 1995)
Accession Number: 74A34360
Subject Category: PHYSICS, GENERAL
Document Type: Conference Proceedings
Publication Information: (SEE A74-34351 16-23)
Publisher Information: United Kingdom
Meeting Information: Symposium on Finite-amplitude wave effects in fluids; August 20-22, 1973; Copenhagen; Denmark
Contract/Grant/Task Num: NGR-47-004-109
Financial Sponsor: NASA; United States
Description: 6p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACOUSTIC ATTENUATION; ACOUSTIC DUCTS; ACOUSTIC PROPAGATION; NONLINEAR EQUATIONS; RECTANGULAR WAVEGUIDES; SOUND PROPAGATION; ACOUSTIC FREQUENCIES; AMPLITUDE DISTRIBUTION ANALYSIS; EULER EQUATIONS OF MOTION; SOUND INTENSITY; SOUND WAVES; WAVE PROPAGATION
Imprint And Other Notes: In: Finite-amplitude wave effects in fluids; Proceedings of the Symposium, Danmarks Tekniske Hojskole, Copenhagen, Denmark, August 20-22, 1973. (A74-34351 16-23) Guildford, Surrey, England, IPC Science and Technology Press, Ltd., 1974, p. 69-74.
Availability Source: Other Sources
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