Vibroacoustic noise estimation of a combined elastic submarine-propeller system subjected to the self-propulsion conditions

I. Kahraman, R. T. Azrak, E. Tunca, A. Kutlu, B. Ugurlu, Bilici

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The radiated sound from an underwater structure is primarily due to the flow about the body and vibrations of the body, whether the exciting mechanism is the propulsion system, external flow, or any mechanical component. The current study covers a particular instance of the complete acoustic radiation problem that the structure-borne noise radiated from a combined system of submarine model and its elastic propeller is investigated by considering the self-propulsion conditions. The selected models for the application are the DARPA-SUBOFF submarine and INSEAN E1617 propeller. The analysis procedure involves adopting a set of numerical methods to capture different aspects of the problem. Accordingly, the unsteady computational fluid dynamics (CFD-URANSE) is applied to express the propeller excitation, the finite element analysis is adopted to represent the dynamic characteristics of the combined elastic system, and the boundary element method is employed to assess the radiated noise resulting from the structural vibrations. The dynamic response of the elastic system, hence the fluid-structure, are described in the modal space, and the acoustic radiation is computed as the superposition of modal noise components. In the application, the low-frequency band 10-250 Hz is spanned and the noise prediction, in terms of sound pressure level, is presented as directivity patterns and surface distributions. The influence of flexibility of propeller blades is also assessed through a comparison with the results obtained for rigid propeller.

Original languageEnglish
Title of host publicationSustainable Development and Innovations in Marine Technologies - Proceedings of the 19th International Congress of the International Maritime Association of the Mediterranean, IMAM 2022
EditorsSelma Ergin, C. Guedes Soares
PublisherCRC Press/Balkema
Pages201-208
Number of pages8
ISBN (Print)9781032416182
DOIs
Publication statusPublished - 2023
Event19th International Congress of the International Maritime Association of the Mediterranean, IMAM 2022 - Istanbul, Turkey
Duration: 26 Sept 202229 Sept 2022

Publication series

NameSustainable Development and Innovations in Marine Technologies - Proceedings of the 19th International Congress of the International Maritime Association of the Mediterranean, IMAM 2022

Conference

Conference19th International Congress of the International Maritime Association of the Mediterranean, IMAM 2022
Country/TerritoryTurkey
CityIstanbul
Period26/09/2229/09/22

Bibliographical note

Publisher Copyright:
© 2023 the Author(s).

Funding

This document is the result of the research projects funded by ITU-BAP (Project No: MGA-2021-43076) and TUBITAK (Project No: 221M042). Authors thank Istanbul Technical University Research Fund (ITU-BAP) and The Scientific and Technological Research Council of Turkey (TUBI-TAK) for the supports they provided.

FundersFunder number
TUBI-TAK
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu221M042
Istanbul Teknik Üniversitesi
Bilimsel Araştırma Projeleri Birimi, İstanbul Teknik ÜniversitesiMGA-2021-43076

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