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physics.flu-dyn2018
Acoustic Propagation in lined ducts with varying cross-section using a Mild-Slope approximation
Maaz Farooqui, Yves Aurégan, Vincent Pagneux
A modelling of low-frequency sound propagation in slowly varying ducts with smoothly varying lining is proposed leading to an acoustic mild-slope equation analogue to the with mild…
physics.flu-dyn2018
Explicit approximation of the wavenumber for lined ducts
Maaz Farooqui, Yves Aurégan, Vincent Pagneux
For acoustic waves in lined ducts, at given frequencies, the dispersion relation leads to a transcendental equation for the wavenumber that has to be solved by numerical methods. B…