Abstract
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 language | English |
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| Title of host publication | 8th AIAA/CEAS Aeroacoustics Conference (Breckenridge CO, USA, June 17-19, 2002), Paper AIAA 2002-2520 |
| Publication status | Published - 2002 |
| Event | 8th AIAA/CEAS Aeroacoustics Conference - Breckenridge, United States Duration: 17 Jun 2002 → 19 Jun 2002 |
Conference
| Conference | 8th AIAA/CEAS Aeroacoustics Conference |
|---|---|
| Country/Territory | United States |
| City | Breckenridge |
| Period | 17/06/02 → 19/06/02 |