Aerodynamics and aeroacoustic of sail masts

Ghadiani, Ali (2019) Aerodynamics and aeroacoustic of sail masts. [Laurea magistrale], Università di Bologna, Corso di Studio in Aerospace engineering / ingegneria aerospaziale [LM-DM270] - Forli', Documento full-text non disponibile
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In this thesis, the turbulent flow induced by sail masts is simulated using compressible k-w SST detached eddy simulation (DES). The mast is investigated in two different yaw angles at 0 and 90 and the predetermined condition is V = 20 m/s to find the main broadband and tonal noise sources. And then the same cases are compared to simple shape of sail mast without internal cavities. The purpose of this work is to investigate whether the cases generate tonal noise when winds past the sail mast. Another objective is to study aerodynamic parameters around the four cases. The influence of the mast tips is assessed and the Sound Pressure Levels (SPL) that are gotten from pressure fluctuations are shown at the end to find the tonal noise and show the study cases with a cavity inside make much more noise than simplified sail mast. By looking at the peaks in the sound pressure level (SPL) the tonal noise at specific frequencies can be found. The commercial software STAR-CCM+ was used for all three parts pre-processing, running simulations, and post-processing to understand the noise generation and aerodynamic features.

Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Ghadiani, Ali
Relatore della tesi
Correlatore della tesi
Corso di studio
Ordinamento Cds
Parole chiave
Sail mast, Detached Eddy Simulation, DES, CFD, Computational Aero-acoustic, CAA, STAR-CCM+, tonal noise, Broadband noise, Sound Pressure Level, SPL
Data di discussione della Tesi
12 Dicembre 2019

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