Abstract
A 2-D analysis is made of the surface waves in a subsonic compressible uniform mean flow along an impedance wall. It is found that a maximum of four surface waves is possible. The regions of existence in complex impedance and wave number planes are given. One wave is found to travel upstream, while the others, one of which is an instability, propagate downstream. A Wiener-Hopf solution of plane wave scattering at a hard/soft discontinuity of the wall impedance is constructed, in which the instability wave provides the additional degree of freedom to satisfy the Kutta condition at the impedance jump. The present waves are limiting forms of certain irregular acoustic duct modes.
Original language | English |
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Title of host publication | Aero- And Hydro-acoustics : IUTAM Symposium Ecole Centrale de Lyon. 3-6 July, 1985 |
Editors | G. Comte-Bellot, John Ffowcs-Williams |
Place of Publication | Heidelberg |
Publisher | Springer |
Pages | 483-490 |
ISBN (Electronic) | 978-3-642-82758-7 |
ISBN (Print) | 978-3-642-82760-0 |
DOIs | |
Publication status | Published - 1986 |
Event | 1985 IUTAM Symposium Aero- And Hydro-acoustics, July 3-6, 1985, Lyon, France - Ecole Centrale de Lyon, Lyon, France Duration: 3 Jul 1985 → 6 Jul 1985 |
Conference
Conference | 1985 IUTAM Symposium Aero- And Hydro-acoustics, July 3-6, 1985, Lyon, France |
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Country/Territory | France |
City | Lyon |
Period | 3/07/85 → 6/07/85 |