Unsteady RANS CFD simulations of ship manoeuvrability and course keeping control under various wave height conditions
Unsteady RANS CFD simulations of ship manoeuvrability and course keeping control under various wave height conditions
Ships encounter different wave heights in real sea states. Various wave heights can lead to substantial changes in the behaviour of a ship during manoeuvring, and hence a ship's manoeuvrability in waves should be accurately evaluated to ensure navigational safety at sea. The aim of this study is to estimate wave height effects on the manoeuvring behaviour of the benchmarking KRISO Container Ship (KCS) model by performing a fully nonlinear unsteady RANS simulation. Three types of manoeuvres were simulated with the free-running KCS model appended with an actuator disk and a moving semi-balanced horn rudder using a dynamic overset technique: self-propulsion, course keeping control, and turning circle manoeuvres. Manoeuvring analyses were carried out in the bow quartering waves of a range of wave heights for constant wave length, as coupled with the fifth-order Stokes wave model. In order to control the rudder deflection based on manoeuvre mechanisms, a feedback controller was embedded in the present CFD model. The results clearly revealed that wave heights have a strong effect on the manoeuvring behaviour of the KCS, including ship's speeds, seakeeping behaviour, and critical turning indices through comparative analyses under different wave height conditions. One important finding is the standard manoeuvring parameters in waves, which would help navigation officers in decision-making for manoeuvring actions in waves.
Kim, Daejeong
2730cb06-0014-46d4-a4d0-1b27d65668b7
Song, Soonseok
5eab39f4-35ac-42b5-b01b-8c4a9d53f2b1
Jeong, Byongug
0ebcb8a7-cc7d-47e3-a92c-f988592b9949
Tezdogan, Tahsin
7e7328e2-4185-4052-8e9a-53fd81c98909
Incecik, Atilla
25a12ee2-7ba6-47cf-af5d-a79de4c6a2c4
December 2021
Kim, Daejeong
2730cb06-0014-46d4-a4d0-1b27d65668b7
Song, Soonseok
5eab39f4-35ac-42b5-b01b-8c4a9d53f2b1
Jeong, Byongug
0ebcb8a7-cc7d-47e3-a92c-f988592b9949
Tezdogan, Tahsin
7e7328e2-4185-4052-8e9a-53fd81c98909
Incecik, Atilla
25a12ee2-7ba6-47cf-af5d-a79de4c6a2c4
Kim, Daejeong, Song, Soonseok, Jeong, Byongug, Tezdogan, Tahsin and Incecik, Atilla
(2021)
Unsteady RANS CFD simulations of ship manoeuvrability and course keeping control under various wave height conditions.
Applied Ocean Research, 117, [102940].
(doi:10.1016/j.apor.2021.102940).
Abstract
Ships encounter different wave heights in real sea states. Various wave heights can lead to substantial changes in the behaviour of a ship during manoeuvring, and hence a ship's manoeuvrability in waves should be accurately evaluated to ensure navigational safety at sea. The aim of this study is to estimate wave height effects on the manoeuvring behaviour of the benchmarking KRISO Container Ship (KCS) model by performing a fully nonlinear unsteady RANS simulation. Three types of manoeuvres were simulated with the free-running KCS model appended with an actuator disk and a moving semi-balanced horn rudder using a dynamic overset technique: self-propulsion, course keeping control, and turning circle manoeuvres. Manoeuvring analyses were carried out in the bow quartering waves of a range of wave heights for constant wave length, as coupled with the fifth-order Stokes wave model. In order to control the rudder deflection based on manoeuvre mechanisms, a feedback controller was embedded in the present CFD model. The results clearly revealed that wave heights have a strong effect on the manoeuvring behaviour of the KCS, including ship's speeds, seakeeping behaviour, and critical turning indices through comparative analyses under different wave height conditions. One important finding is the standard manoeuvring parameters in waves, which would help navigation officers in decision-making for manoeuvring actions in waves.
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Accepted/In Press date: 22 October 2021
e-pub ahead of print date: 3 November 2021
Published date: December 2021
Identifiers
Local EPrints ID: 473839
URI: http://eprints.soton.ac.uk/id/eprint/473839
ISSN: 0141-1187
PURE UUID: 823630b0-efe9-4bc2-ba90-4fed4e4adecb
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Date deposited: 01 Feb 2023 17:41
Last modified: 17 Mar 2024 07:38
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Author:
Daejeong Kim
Author:
Soonseok Song
Author:
Byongug Jeong
Author:
Tahsin Tezdogan
Author:
Atilla Incecik
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