Aeroacoustic performance of a seal vibrissa shaped cylinder

Tom Smith*, Guanjiang Chen, B. Zang

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

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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.
Original languageEnglish
Pages (from-to)1585-1595
Number of pages11
JournalJournal of the Acoustical Society of America
Volume154
Issue number3
DOIs
Publication statusPublished - 12 Sept 2023

Bibliographical note

Funding Information:
The authors wish to acknowledge the use of the University College London (UCL) Kathleen High Performance Computing Facility and associated support services in the completion of this work. The authors also acknowledge the Fluid and Aerodynamics Research Group of University of Bristol (UoB). The Ph.D. grant for G.C. is funded by the China Scholarship Council (CSC)- UoB Ph.D. scholarship.

Publisher Copyright:
© 2023 Acoustical Society of America.

Structured keywords

  • Wind Tunnel

Keywords

  • Aeroacoustics
  • Vibrissa cylinder
  • Noise Control

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