Hydrodynamic instabilities and surface waves in a flow over an impedance wall

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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 languageEnglish
Title of host publicationAero- And Hydro-acoustics : IUTAM Symposium Ecole Centrale de Lyon. 3-6 July, 1985
EditorsG. Comte-Bellot, John Ffowcs-Williams
Place of PublicationHeidelberg
PublisherSpringer
Pages483-490
ISBN (Electronic)978-3-642-82758-7
ISBN (Print)978-3-642-82760-0
DOIs
Publication statusPublished - 1986
Event1985 IUTAM Symposium Aero- And Hydro-acoustics, July 3-6, 1985, Lyon, France - Ecole Centrale de Lyon, Lyon, France
Duration: 3 Jul 19856 Jul 1985

Conference

Conference1985 IUTAM Symposium Aero- And Hydro-acoustics, July 3-6, 1985, Lyon, France
CountryFrance
CityLyon
Period3/07/856/07/85

Fingerprint

Dive into the research topics of 'Hydrodynamic instabilities and surface waves in a flow over an impedance wall'. Together they form a unique fingerprint.

Cite this