Closed form solutions are presented for sound propagation from a line source in or near a shear layer. The analysis is exact for all frequencies and is developed assuming a linear velocity profile in the shear layer. This assumption allows the solution to be expressed in terms of parabolic cylinder functions. The solution is presented for a line monopole source first embedded in the uniform flow and then in the shear layer. Solutions are also discussed for certain types of dipole and quadrupole sources. Asymptotic expansions of the exact solutions for small and large values of Strouhal number give expressions which correspond to solutions previously obtained for these limiting cases. (Kursetz)
Propagation of sound waves through a linear shear layer - a closed form solution
Eine mathematische Loesung zur Fortpflanzung von Schallwellen durch eine lineare Scherstroemungsschicht
AIAA-Papers ; 1-14
1978
14 Seiten, 7 Bilder, 19 Quellen
Conference paper
English
Propagation of Sound Waves through a Linear Shear Layer
AIAA | 1979
|On sound propagation in a linear shear flow
Online Contents | 1999
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