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Acoustic waves in a mean flow duct with varying boundary
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. (Vågor och signaler)
National Institute of Advanced Technology (ENSTA, Paris), France.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. (Vågor och signaler)
2009 (English)In: 15th AIAA/CEAS Aeroacoustics Conference, Miami 11-13May 2009: Paper AIAA-2009-3407, 2009Conference paper, (Other academic)
Abstract [en]

The problem of modelling sound waves in a two-dimensional wave-guide of general shape carrying a mean flow is addressed. The mean flow may be inhomogeneous but is irrotational. A convective wave equation for the velocity potential is derived. It is in a form suitable for generalizing an earlier developed theory for a stable modelling of acoustic waves in quiescent waveguides with complicated geometry to also include a mean flow. The theory is illustrated with numerical results for reflection and transmission demonstrating the effectiveness of the method for low and medium frequencies.

Place, publisher, year, edition, pages
2009.
National Category
Fluid Mechanics and Acoustics
Research subject
Mathematics, Applied Mathematics
Identifiers
URN: urn:nbn:se:lnu:diva-7458OAI: oai:DiVA.org:lnu-7458DiVA: diva2:344279
Available from: 2010-08-18 Created: 2010-08-18 Last updated: 2011-03-28Bibliographically approved

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