Classification of aeroacoustically relevant surface modes in cylindrical lined ducts

@inproceedings{Brambley2006ClassificationOA,
  title={Classification of aeroacoustically relevant surface modes in cylindrical lined ducts},
  author={Edward James Brambley and Nigel Peake},
  year={2006}
}
Abstract Wave modes in a straight cylindrical duct with a locally reacting boundary and a steady subsonic axial flow are investigated. The duct modes are separated into ordinary duct modes and surface modes confined to a neighbourhood of the boundary. Previous asymptotic results of Rienstra for the surface modes assume that the dimensionless frequency ω is large, and that the azimuthal order m ≪ ω. In this paper, these results are generalized to arbitrary values of m, as applicable to rotor… CONTINUE READING

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