The Webster equation revisited

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


The problem of low-frequency sound propagation in slowly varying ducts is systematically analysed as a perturbation problem of slow variation. The Webster equation and some variants are derived, and the entrance/exit plane boundary layer is given. It is shown why a varying lined duct in general does not have a solution.
Original languageEnglish
Title of host publication8th AIAA/CEAS Aeroacoustics Conference (Breckenridge CO, USA, June 17-19, 2002), Paper AIAA 2002-2520
Publication statusPublished - 2002
Event8th AIAA/CEAS Aeroacoustics Conference - Breckenridge, United States
Duration: 17 Jun 200219 Jun 2002


Conference8th AIAA/CEAS Aeroacoustics Conference
Country/TerritoryUnited States


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