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Vibrissa-shaped cylinder as passive noise control

Riccardo Martellucci

Vibrissa-shaped cylinder as passive noise control.

Rel. Francesco Avallone, Beckett Zhou, Mario Ali'. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Aerospaziale, 2024

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Abstract:

The following research project aims to investigate the aeroacoustic properties of a vibrissa-shaped cylinder. This bio-inspired geometry is modeled after the whiskers of harbour seals. Initial researches on the properties of these whiskers have revealed their adaptive ability to suppress the vortex shedding. Vortex shedding is a fluid dynamic phenomenon associated with a bluff body, such as a circular cylinder, in cross-flow. The formation of vortex shedding generates aerodynamic noise, which is the primary focus of the following study. Specifically, the aerodynamic noise produced by both geometries is evaluated and compared to validate findings from literature regarding the vibrissa-shaped cylinder's capability to reduce noise levels compared to a circular cylinder. Numerical investigations delve into the reasons for this reduction, with a particular emphasis on the distinct wake pattern of the vibrissa-shaped cylinder in the absence of vortex shedding.

Relators: Francesco Avallone, Beckett Zhou, Mario Ali'
Academic year: 2023/24
Publication type: Electronic
Number of Pages: 67
Subjects:
Corso di laurea: Corso di laurea magistrale in Ingegneria Aerospaziale
Classe di laurea: New organization > Master science > LM-20 - AEROSPATIAL AND ASTRONAUTIC ENGINEERING
Ente in cotutela: University of Bristol (REGNO UNITO)
Aziende collaboratrici: University of Bristol
URI: http://webthesis.biblio.polito.it/id/eprint/32313
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