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Low-level flow-induced acoustic resonances in ducts |
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| Authors: | M Mathias AN Stokes K Hourigan MC Welsh |
| Institution: | * University College of Swansea, Swansea, UK + CSIRO, Division of Mathematics and Statistics, Clayton, Victoria 3168, Australia # CSIRO, Division of Energy Technology, Highett, Victoria 3190, Australia |
| Abstract: | Acoustic resonances are generated by air moving past a plate with a semi-circular leading edge located in a duct. The sound stimulates the small separation bubble near the leading edge to shed vortices into the boundary layer at the sound frequency. The acoustic energy required to sustain the resonances is generated as these vortices pass the trailing edge of the plate. |
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