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Acoustic characterisation of towing tanks

Acoustic characterisation of towing tanks
Acoustic characterisation of towing tanks
Large water tanks known as towing tanks, wave basins and cavitation tunnels, are used to determine the performance of ships, boats and submarines at model-scale. They may also be used for noise measurements but suffer from the effects of reverberation, which makes it difficult to capture the free field conditions necessary for complete characterisation of the noise. This paper describes an adapted Image Source Model and its use to understand these reverberation effects. It extends the conventional Image Source Model by the use of spherical wave reflection coefficients at the tank boundaries, in addition to the inclusion of volumetric absorption. Validation of the Image Source Model is undertaken by comparison with published transfer function measurements made in the depressurized wave basin at the Maritime Research Institute Netherlands (MARIN). The relative contribution to the tank response from the direct field and free surface is examined. The tank response is found to vary with three frequency-scales (periodicities) resulting from interactions with the free surface and axial modes.
Reverberation, towing tank, underwater noise, underwater sound
0029-8018
Way, Henry Frederick Michael
a57f4d65-ffb8-4c23-bfef-02f863558653
Joseph, Phillip
9c30491e-8464-4c9a-8723-2abc62bdf75d
Humphrey, Victor
23c9bd0c-7870-428f-b0dd-5ff158d22590
Turnock, Stephen
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Leung, Ronnie
9ac6df13-1781-4a52-97c9-75175c6ad971
Way, Henry Frederick Michael
a57f4d65-ffb8-4c23-bfef-02f863558653
Joseph, Phillip
9c30491e-8464-4c9a-8723-2abc62bdf75d
Humphrey, Victor
23c9bd0c-7870-428f-b0dd-5ff158d22590
Turnock, Stephen
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Leung, Ronnie
9ac6df13-1781-4a52-97c9-75175c6ad971

Way, Henry Frederick Michael, Joseph, Phillip, Humphrey, Victor, Turnock, Stephen and Leung, Ronnie (2020) Acoustic characterisation of towing tanks. Ocean Engineering, [108338]. ().

Record type: Special issue

Abstract

Large water tanks known as towing tanks, wave basins and cavitation tunnels, are used to determine the performance of ships, boats and submarines at model-scale. They may also be used for noise measurements but suffer from the effects of reverberation, which makes it difficult to capture the free field conditions necessary for complete characterisation of the noise. This paper describes an adapted Image Source Model and its use to understand these reverberation effects. It extends the conventional Image Source Model by the use of spherical wave reflection coefficients at the tank boundaries, in addition to the inclusion of volumetric absorption. Validation of the Image Source Model is undertaken by comparison with published transfer function measurements made in the depressurized wave basin at the Maritime Research Institute Netherlands (MARIN). The relative contribution to the tank response from the direct field and free surface is examined. The tank response is found to vary with three frequency-scales (periodicities) resulting from interactions with the free surface and axial modes.

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More information

Accepted/In Press date: 31 October 2020
e-pub ahead of print date: 13 November 2020
Keywords: Reverberation, towing tank, underwater noise, underwater sound

Identifiers

Local EPrints ID: 444998
URI: http://eprints.soton.ac.uk/id/eprint/444998
DOI:
ISSN: 0029-8018
PURE UUID: cc5732bd-97f5-42a9-a03b-4817c011abc5
ORCID for Victor Humphrey:
ORCID for Stephen Turnock:

Catalogue record

Date deposited: 17 Nov 2020 17:39
Last modified: 23 Nov 2020 17:30

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Author: Henry Frederick Michael Way
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Author: Ronnie Leung

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