Sound propagation in slowly varying lined flow ducts of arbitrary cross section Rienstra

@inproceedings{Rienstra2003SoundPI,
  title={Sound propagation in slowly varying lined flow ducts of arbitrary cross section Rienstra},
  author={Sjoerd W. Rienstra},
  year={2003}
}
Sound transmission through ducts of constant cross section with a uniform inviscid mean flow and a constant acoustic lining (impedance wall) is classically described by a modal expansion, where the modes are eigenfunctions of the corresponding Laplace eigenvalue problem along a duct cross section. A natural extension for ducts with cross section and wall impedance that are varying slowly (compared to a typical acoustic wave length and a typical duct radius) in axial direction is a multiple… CONTINUE READING
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