Numerical investigation of depth-varying currents on ship hydrodynamics in confined water
Numerical investigation of depth-varying currents on ship hydrodynamics in confined water
Vessels can operate in unpredictable environments depending on the geographical area and weather conditions. One example of conditions a vessel might not be assessed against is the presence of depth-varying currents, which are particularly relevant in confined waters where currents can be created due to tidal influences, or short fetches in inland waterways. The possible presence of depth-varying currents motivates a numerical assessment of the effects of sheared currents on the hydrodynamic performance of the KRISO Container Ship (KCS) in confined waters. The results highlight that exploiting currents, such as those generated by tides could be used to improve the energy efficiency of vessels considerably. These currents present significant possibilities for voyage optimisation based on geographical and meteorological conditions. The results specific for the KRISO container ship point to resistance reductions when the current assists ship motions, accompanied by considerable decreases in sinkage and trim. Conversely, when currents oppose ship motion, resistance, sinkage and trim can increase by a factor of 3 depending on the strength and shape of the depth-varying current. The results also show that a current with constant vorticity, a case frequently used in the literature to investigate the impact of sheared currents, creates the biggest increase and decrease for inhibiting and assisting currents, respectively.
CFD, Confined water, KCS, Sheared currents, Ship resistance, URANS
Terziev, Momchil
938f71d0-02b5-414c-8c2d-9cca8cc87397
Tezdogan, Tahsin
7e7328e2-4185-4052-8e9a-53fd81c98909
Demirel, Yigit Kemal
44a59a7c-8ba9-481d-be96-d50c46fbdf34
Muscat-Fenech, Claire De Marco
cea2b583-5b6a-4205-b15f-22fe1594fcb4
Incecik, Atilla
25a12ee2-7ba6-47cf-af5d-a79de4c6a2c4
Terziev, Momchil
938f71d0-02b5-414c-8c2d-9cca8cc87397
Tezdogan, Tahsin
7e7328e2-4185-4052-8e9a-53fd81c98909
Demirel, Yigit Kemal
44a59a7c-8ba9-481d-be96-d50c46fbdf34
Muscat-Fenech, Claire De Marco
cea2b583-5b6a-4205-b15f-22fe1594fcb4
Incecik, Atilla
25a12ee2-7ba6-47cf-af5d-a79de4c6a2c4
Terziev, Momchil, Tezdogan, Tahsin, Demirel, Yigit Kemal, Muscat-Fenech, Claire De Marco and Incecik, Atilla
(2022)
Numerical investigation of depth-varying currents on ship hydrodynamics in confined water.
International Journal of Naval Architecture and Ocean Engineering, 14, [100461].
(doi:10.1016/j.ijnaoe.2022.100461).
Abstract
Vessels can operate in unpredictable environments depending on the geographical area and weather conditions. One example of conditions a vessel might not be assessed against is the presence of depth-varying currents, which are particularly relevant in confined waters where currents can be created due to tidal influences, or short fetches in inland waterways. The possible presence of depth-varying currents motivates a numerical assessment of the effects of sheared currents on the hydrodynamic performance of the KRISO Container Ship (KCS) in confined waters. The results highlight that exploiting currents, such as those generated by tides could be used to improve the energy efficiency of vessels considerably. These currents present significant possibilities for voyage optimisation based on geographical and meteorological conditions. The results specific for the KRISO container ship point to resistance reductions when the current assists ship motions, accompanied by considerable decreases in sinkage and trim. Conversely, when currents oppose ship motion, resistance, sinkage and trim can increase by a factor of 3 depending on the strength and shape of the depth-varying current. The results also show that a current with constant vorticity, a case frequently used in the literature to investigate the impact of sheared currents, creates the biggest increase and decrease for inhibiting and assisting currents, respectively.
Text
1-s2.0-S2092678222000279-main (1)
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Accepted/In Press date: 16 May 2022
e-pub ahead of print date: 26 May 2022
Keywords:
CFD, Confined water, KCS, Sheared currents, Ship resistance, URANS
Identifiers
Local EPrints ID: 473880
URI: http://eprints.soton.ac.uk/id/eprint/473880
ISSN: 2092-6782
PURE UUID: 90654dd1-e927-4337-bc57-e7115cfc1f10
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Date deposited: 02 Feb 2023 17:36
Last modified: 17 Mar 2024 04:18
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Author:
Momchil Terziev
Author:
Tahsin Tezdogan
Author:
Yigit Kemal Demirel
Author:
Claire De Marco Muscat-Fenech
Author:
Atilla Incecik
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