Smith, Tom A;
Chen, Guanjiang;
Zang, Bin;
(2023)
Aeroacoustic performance of a seal vibrissa shaped cylinder.
Journal of the Acoustical Society of America
, 154
(3)
pp. 1585-1595.
10.1121/10.0020912.
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Abstract
Bio-inspired geometries have many applications in engineering, including in the field of noise control. In this work, the aeroacoustic performance of a seal vibrissa shaped cylinder (SVSC) is investigated and compared to that of a circular cylinder at Re = 37 000. Experiments conducted in an anechoic wind tunnel are compared to results from a hybrid aeroacoustic simulation with excellent agreement observed between the two. The overall sound pressure level is found to be 24.3 dB lower for the SVSC, and no prominent narrowband component is observed in the acoustic spectrum. Analysis of the flow field and surface pressure fluctuations reveals that this is because the usual large-scale alternating vortex shedding realized for bluff body flows is absent for the SVSC. Instead, smaller uncorrelated vortices are shed from the upper and lower sides of the geometry, which, when combined with a lower spanwise correlation, results in a much lower acoustic intensity spread over a broader frequency range.
| Type: | Article |
|---|---|
| Title: | Aeroacoustic performance of a seal vibrissa shaped cylinder |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1121/10.0020912 |
| Publisher version: | https://doi.org/10.1121/10.0020912 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | Bioacoustics of mammals, Acoustical properties, Aeroacoustics, Acoustic spectroscopy, Acoustic noise control, Acoustic waves, Signal processing, Fluid mechanics, Aerodynamics, Vortex dynamics |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10177330 |
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