Approximation for Thin Boundary Layers in the Sheared Flow Duct Transmission Problem
An approximation based on an inner-expansion method is shown for obtaining an analytical solution for the problem of the transmission of sound in a duct containing a sheared flow in the case when the region of nonuniform flow is very thin. The method can be used with conventional uniform-flow transmission analysis to determine wavenumbers and mode shapes for acoustic propagation and attenuation.
W. Eversman, "Approximation for Thin Boundary Layers in the Sheared Flow Duct Transmission Problem," Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Jan 1973.
The definitive version is available at https://doi.org/10.1121/1.1913478
Mechanical and Aerospace Engineering
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© 1973 Acoustical Society of America (ASA), All rights reserved.