Numerical Techniques in Linear Duct Acoustics—A Status Report

[+] Author and Article Information
K. J. Baumeister

NASA Lewis Research Center, Cleveland, Ohio 44135

J. Eng. Ind 103(3), 270-281 (Aug 01, 1981) (12 pages) doi:10.1115/1.3184486 History: Received July 01, 1980; Online July 30, 2009


A review is presented covering both finite difference and finite element analysis of small amplitude (linear) sound propagation in straight and variable area ducts with flow, as might be found in a typical turbojet engine duct, muffler, or industrial ventilation system. Both steady-state and transient theories are discussed. Emphasis is placed on the advantages and limitations associated with the various numerical techniques. Examples of practical problems are given for which the numerical techniques have been applied.

Copyright © 1981 by ASME
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