Low-level flow-induced acoustic resonances in ducts

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 resona...

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Bibliographic Details
Published in:Fluid dynamics research 1988-09, Vol.3 (1), p.353-356
Main Authors: Mathias, M., Stokes, A.N., Hourigan, K., Welsh, M.C.
Format: Article
Language:English
Subjects:
acoustic emissions
ducts
resonance
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Summary: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.
ISSN:0169-5983
1873-7005
1873-7005
DOI:10.1016/0169-5983(88)90091-3