NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Finite-amplitude waves in cylindrical lined ductsA second-order uniformly valid expansion is obtained for nonlinear waves propagating in a cylindrical duct lined with a point-reacting acoustic material that consists of a porous sheet followed by honey-comb cavities and backed by the impervious walls of the duct. The effect of the liner is taken into account by coupling the waves in the duct with those in the liner. As in the two-dimensional case, the nonlinearity increases the attenuation rate at all frequencies except in narrow bandwidths around the resonant frequencies, irrespective of the geometrical dimensions of the liner or the acoustic properties of the porous sheet.
Document ID
19740050395
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Nayfeh, A. H.
Tsai, M.-S.
(Virginia Polytechnic Institute and State University Blacksburg, Va., United States)
Date Acquired
August 7, 2013
Publication Date
June 1, 1974
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 74-553
Meeting Information
Meeting: Fluid and Plasma Dynamics Conference
Location: Palo Alto, CA
Start Date: June 17, 1974
End Date: June 19, 1974
Sponsors: American Institute of Aeronautics and Astronautics
Accession Number
74A33145
Funding Number(s)
CONTRACT_GRANT: NGR-47-004-109
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available