A numerical assessment of the scale effects of a ship advancing through restricted waters
A numerical assessment of the scale effects of a ship advancing through restricted waters
Restricted waters present several challenges for ship builders and operators. The proximity of the seabed and river or canal banks cause viscous effects to be more pronounced than in unrestricted waters. These effects do not follow a linear scaling law, which is typically assumed in terms of sinkage and trim. Moreover, the resistance of the ship is increased in a complex fashion, which has largely eluded researchers. The present study will aim to elucidate scale effects in shallow water performance predictions. Particular attention is placed on the form factor, wave resistance, and frictional resistance. Scale effects are confirmed in the two former parameters. Justification for the obtained results is sought in terms of flow properties. Specifically, the flow velocity and boundary layer thickness are examined in detail. The selected case-study reflects recent experimental work on the KCS hull form in restricted waters.
Terziev, Momchil
938f71d0-02b5-414c-8c2d-9cca8cc87397
Tezdogan, Tahsin
7e7328e2-4185-4052-8e9a-53fd81c98909
Incecik, Atilla
25a12ee2-7ba6-47cf-af5d-a79de4c6a2c4
June 2021
Terziev, Momchil
938f71d0-02b5-414c-8c2d-9cca8cc87397
Tezdogan, Tahsin
7e7328e2-4185-4052-8e9a-53fd81c98909
Incecik, Atilla
25a12ee2-7ba6-47cf-af5d-a79de4c6a2c4
Terziev, Momchil, Tezdogan, Tahsin and Incecik, Atilla
(2021)
A numerical assessment of the scale effects of a ship advancing through restricted waters.
Ocean Engineering, [108972].
(doi:10.1016/j.oceaneng.2021.108972).
Abstract
Restricted waters present several challenges for ship builders and operators. The proximity of the seabed and river or canal banks cause viscous effects to be more pronounced than in unrestricted waters. These effects do not follow a linear scaling law, which is typically assumed in terms of sinkage and trim. Moreover, the resistance of the ship is increased in a complex fashion, which has largely eluded researchers. The present study will aim to elucidate scale effects in shallow water performance predictions. Particular attention is placed on the form factor, wave resistance, and frictional resistance. Scale effects are confirmed in the two former parameters. Justification for the obtained results is sought in terms of flow properties. Specifically, the flow velocity and boundary layer thickness are examined in detail. The selected case-study reflects recent experimental work on the KCS hull form in restricted waters.
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Accepted/In Press date: 2 April 2021
e-pub ahead of print date: 21 April 2021
Published date: June 2021
Identifiers
Local EPrints ID: 473900
URI: http://eprints.soton.ac.uk/id/eprint/473900
ISSN: 0029-8018
PURE UUID: b6c4528a-32ef-4e27-b8d3-5002a9a977b8
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Date deposited: 02 Feb 2023 17:45
Last modified: 17 Mar 2024 04:18
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Author:
Momchil Terziev
Author:
Tahsin Tezdogan
Author:
Atilla Incecik
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