CFD-based hydrodynamic analyses of ship course keeping control and turning performance in irregular waves
CFD-based hydrodynamic analyses of ship course keeping control and turning performance in irregular waves
Ship manoeuvrability studies are usually carried out in calm and regular seas; however, an irregular sea state can better present the real operational conditions at sea, compared to both calm and regular seas. In this study, the manoeuvrability of a well-known benchmarking ship in an irregular sea state was investigated using a fully nonlinear unsteady RANS model. The JONSWAP spectrum was used to generate long-crested irregular seas with a significant wave height of 5m and a peak period of 12.4s in full scale, representing sea state 6. Comparisons with the ship manoeuvrability in both calm and regular seas were also made with a view to identifying the changes in the manoeuvring characteristics of the ship. The generated regular waves were characterised by the height and period equivalent to the average height and period of the irregular waves applied in this work. The ship is equipped with a single propeller with a semi-balanced horn rudder, and the propeller is simulated by an actuator disk model based on the body force method. In analysing the correlations between the ship manoeuvrability and the irregular waves, the findings of this study have demonstrated that the irregular waves may cause substantial changes in the course keeping capability and turning performance when compared to the inherent manoeuvring qualities in calm water. It is expected that the results of this work can provide a deeper insight into ship manoeuvrability in irregular waves as well as help masters and navigation officers in decision-making for ship handling actions in real sea states.
Dynamic overset, Irregular waves, KCS, Seakeeping, Ship hydrodynamics, Ship manoeuvring
Kim, Daejeong
2730cb06-0014-46d4-a4d0-1b27d65668b7
Tezdogan, Tahsin
7e7328e2-4185-4052-8e9a-53fd81c98909
15 March 2022
Kim, Daejeong
2730cb06-0014-46d4-a4d0-1b27d65668b7
Tezdogan, Tahsin
7e7328e2-4185-4052-8e9a-53fd81c98909
Kim, Daejeong and Tezdogan, Tahsin
(2022)
CFD-based hydrodynamic analyses of ship course keeping control and turning performance in irregular waves.
Ocean Engineering, 248, [110808].
(doi:10.1016/j.oceaneng.2022.110808).
Abstract
Ship manoeuvrability studies are usually carried out in calm and regular seas; however, an irregular sea state can better present the real operational conditions at sea, compared to both calm and regular seas. In this study, the manoeuvrability of a well-known benchmarking ship in an irregular sea state was investigated using a fully nonlinear unsteady RANS model. The JONSWAP spectrum was used to generate long-crested irregular seas with a significant wave height of 5m and a peak period of 12.4s in full scale, representing sea state 6. Comparisons with the ship manoeuvrability in both calm and regular seas were also made with a view to identifying the changes in the manoeuvring characteristics of the ship. The generated regular waves were characterised by the height and period equivalent to the average height and period of the irregular waves applied in this work. The ship is equipped with a single propeller with a semi-balanced horn rudder, and the propeller is simulated by an actuator disk model based on the body force method. In analysing the correlations between the ship manoeuvrability and the irregular waves, the findings of this study have demonstrated that the irregular waves may cause substantial changes in the course keeping capability and turning performance when compared to the inherent manoeuvring qualities in calm water. It is expected that the results of this work can provide a deeper insight into ship manoeuvrability in irregular waves as well as help masters and navigation officers in decision-making for ship handling actions in real sea states.
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e-pub ahead of print date: 17 February 2022
Published date: 15 March 2022
Additional Information:
Funding Information:
It should be noted that the results were obtained using the ARCHIE-WeSt High Performance Computer (www.archie-west.ac.uk) based at the University of Strathclyde.
Publisher Copyright:
© 2022 Elsevier Ltd
Keywords:
Dynamic overset, Irregular waves, KCS, Seakeeping, Ship hydrodynamics, Ship manoeuvring
Identifiers
Local EPrints ID: 473874
URI: http://eprints.soton.ac.uk/id/eprint/473874
ISSN: 0029-8018
PURE UUID: 0092fe99-89d5-4dc2-831d-4daf27a488a4
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Date deposited: 02 Feb 2023 17:34
Last modified: 17 Mar 2024 04:18
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Author:
Daejeong Kim
Author:
Tahsin Tezdogan
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