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
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].
(doi:10.1016/j.oceaneng.2020.108338).
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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Accepted/In Press date: 31 October 2020
e-pub ahead of print date: 13 November 2020
Additional Information:
Funding Information:
This work is supported by Dstl through an EPSRC industrial case studentship, voucher code 16000010. Many thanks to Frans Hendrik Lafeber from MARIN for sharing the data acquired in the SONIC project, which was funded by the 7th Framework Programme (FP7) of the European Com-mission under Grant Agreement no. 314394 . The authors acknowledge the use of the IRIDIS High Performance Computing Facility, and associated support services at the University of Southampton , in the completion of this work.
Publisher Copyright:
© 2020
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
Keywords:
Reverberation, towing tank, underwater noise, underwater sound
Identifiers
Local EPrints ID: 444998
URI: http://eprints.soton.ac.uk/id/eprint/444998
ISSN: 0029-8018
PURE UUID: cc5732bd-97f5-42a9-a03b-4817c011abc5
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Date deposited: 17 Nov 2020 17:39
Last modified: 17 Mar 2024 06:03
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Author:
Henry Frederick Michael Way
Author:
Ronnie Leung
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