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Propagation of spinning acoustic modes in partially choked converging ductsA computer model based on the wave-envelope technique is used to study the propagation of spinning acoustic modes in converging hard-walled and lined circular ducts carrying near sonic mean flows. The results show that with increasing spinning mode number the intensification of the acoustic signal at the throat decreases for upstream propagation. The influence of the throat Mach number, frequency, boundary-layer thickness, and liner admittance on the propagation of spinning modes is considered.
Document ID
19820045767
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Nayfeh, A. H.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Kelly, J. J.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Watson, L. T.
(Virginia Polytechnic Institute and State University Blacksburg, VA, United States)
Date Acquired
August 10, 2013
Publication Date
April 1, 1982
Publication Information
Publication: Acoustical Society of America
Subject Category
Acoustics
Accession Number
82A29302
Funding Number(s)
CONTRACT_GRANT: NSG-1573
Distribution Limits
Public
Copyright
Other

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