Acoustic of a perforated liner with grazing flow: Floquet-Bloch periodical approach versus impedance continuous approach.

@article{Dai2016AcousticOA,
  title={Acoustic of a perforated liner with grazing flow: Floquet-Bloch periodical approach versus impedance continuous approach.},
  author={Xiwen Dai and Y. Aur{\'e}gan},
  journal={The Journal of the Acoustical Society of America},
  year={2016},
  volume={140 3},
  pages={
          2047
        }
}
  • Xiwen Dai, Y. Aurégan
  • Published 2016
  • Materials Science, Medicine
  • The Journal of the Acoustical Society of America
The effect of a shear flow on an acoustic liner consisting of a perforated plate backed by cavities is studied. Two different approaches are investigated: First, the duct and the liner are considered as a periodic system while in the second approach the liner is considered as homogeneous and described by an impedance. Those two approaches coincide perfectly without flow for a small hole spacing compared to the acoustic wavelength. This work demonstrates that those two approaches are not wholly… Expand
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