Transmission of sound through high subsonic flows in non-uniform ductsThe transmission of sound through a near-sonic throat in a variable area duct is studied using the method of matched asymptotic expansions applied to a quasi-one-dimensional model. Nonlinear interactions between the mean flow and the acoustic perturbation in the throat region are shown to cause significant effects on the sound field upstream and downstream of the throat. Numerical results are presented for several special applications of the general nonlinear theory.
Document ID
19780057945
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Myers, M. K. (George Washington University Joint Institute for Advancement of Flight Sciences, Hampton, Va., United States)
Callegari, A. J. (Joint Inst. for Advancement of Flight Sciences Hampton, VA, United States)
Date Acquired
August 9, 2013
Publication Date
July 1, 1978
Subject Category
Acoustics
Report/Patent Number
AIAA PAPER 78-1155
Meeting Information
Meeting: Fluid and Plasma Dynamics Conference
Location: Seattle, WA
Start Date: July 10, 1978
End Date: July 12, 1978
Sponsors: American Institute of Aeronautics and Astronautics