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Hydrodynamic analysis of ship manoeuvrability in shallow water using high-fidelity URANS computations
https://orcid.org/0000-0001-7136-0087
https://orcid.org/0000-0002-7032-3038
Highlights The importance of proper understanding of ship manoeuvrability in shallow water was discussed. Ship manoeuvring behaviours were determined in various finite depth conditions in free running CFD platform. The ratio of water depth to draft was identified as a key parameter to determine turning manoeuvring indices and trajectories. It is highly believed to offer a practical insight into enhancing the ship manoeuvrability in a reliable way.
Abstract The manoeuvring performance of a ship in shallow water is substantially different from its performance in deep water, attributed to shallow water effects caused by the presence of a finite water depth. Without a doubt a ship will navigate in areas of shallow water at various times during its operational life (such as when approaching harbours or ports), which underscores the importance of understanding the shallow water effects on ship manoeuvrability. In the present paper, the manoeuvrability of the KRISO Container Ship (KCS) model in different shallow water conditions was comprehensively analysed by means of the unsteady Reynolds-Averaged Navier-Stokes (URANS) computations coupled with the equations of rigid body motion with full six degrees of freedom (6DOF). A dynamic overset grid approach was implemented to allow the ship hull to move in 6DOF in a computational domain and to enable the rudder to be deflected according to a rudder controller for free-running manoeuvres. A series of manoeuvring simulations were performed in shallow waters with water depth to draft ratios varying between 1.2 and 4.0, and partially validated with the available experimental data from a free running test. The numerical results revealed that the ship advance, transfer, and tactical diameter mainly increased with the decrease in the ratio of water depth to draft, closely associated with the complicated interactions between the hull wake, boundary layer, propeller, vortex, and sea floor.
Hydrodynamic analysis of ship manoeuvrability in shallow water using high-fidelity URANS computations
https://orcid.org/0000-0001-7136-0087
https://orcid.org/0000-0002-7032-3038
Highlights The importance of proper understanding of ship manoeuvrability in shallow water was discussed. Ship manoeuvring behaviours were determined in various finite depth conditions in free running CFD platform. The ratio of water depth to draft was identified as a key parameter to determine turning manoeuvring indices and trajectories. It is highly believed to offer a practical insight into enhancing the ship manoeuvrability in a reliable way.
Abstract The manoeuvring performance of a ship in shallow water is substantially different from its performance in deep water, attributed to shallow water effects caused by the presence of a finite water depth. Without a doubt a ship will navigate in areas of shallow water at various times during its operational life (such as when approaching harbours or ports), which underscores the importance of understanding the shallow water effects on ship manoeuvrability. In the present paper, the manoeuvrability of the KRISO Container Ship (KCS) model in different shallow water conditions was comprehensively analysed by means of the unsteady Reynolds-Averaged Navier-Stokes (URANS) computations coupled with the equations of rigid body motion with full six degrees of freedom (6DOF). A dynamic overset grid approach was implemented to allow the ship hull to move in 6DOF in a computational domain and to enable the rudder to be deflected according to a rudder controller for free-running manoeuvres. A series of manoeuvring simulations were performed in shallow waters with water depth to draft ratios varying between 1.2 and 4.0, and partially validated with the available experimental data from a free running test. The numerical results revealed that the ship advance, transfer, and tactical diameter mainly increased with the decrease in the ratio of water depth to draft, closely associated with the complicated interactions between the hull wake, boundary layer, propeller, vortex, and sea floor.
Hydrodynamic analysis of ship manoeuvrability in shallow water using high-fidelity URANS computations
https://orcid.org/0000-0001-7136-0087
https://orcid.org/0000-0002-7032-3038
Highlights The importance of proper understanding of ship manoeuvrability in shallow water was discussed. Ship manoeuvring behaviours were determined in various finite depth conditions in free running CFD platform. The ratio of water depth to draft was identified as a key parameter to determine turning manoeuvring indices and trajectories. It is highly believed to offer a practical insight into enhancing the ship manoeuvrability in a reliable way.
Abstract The manoeuvring performance of a ship in shallow water is substantially different from its performance in deep water, attributed to shallow water effects caused by the presence of a finite water depth. Without a doubt a ship will navigate in areas of shallow water at various times during its operational life (such as when approaching harbours or ports), which underscores the importance of understanding the shallow water effects on ship manoeuvrability. In the present paper, the manoeuvrability of the KRISO Container Ship (KCS) model in different shallow water conditions was comprehensively analysed by means of the unsteady Reynolds-Averaged Navier-Stokes (URANS) computations coupled with the equations of rigid body motion with full six degrees of freedom (6DOF). A dynamic overset grid approach was implemented to allow the ship hull to move in 6DOF in a computational domain and to enable the rudder to be deflected according to a rudder controller for free-running manoeuvres. A series of manoeuvring simulations were performed in shallow waters with water depth to draft ratios varying between 1.2 and 4.0, and partially validated with the available experimental data from a free running test. The numerical results revealed that the ship advance, transfer, and tactical diameter mainly increased with the decrease in the ratio of water depth to draft, closely associated with the complicated interactions between the hull wake, boundary layer, propeller, vortex, and sea floor.
Hydrodynamic analysis of ship manoeuvrability in shallow water using high-fidelity URANS computations
Kim, Daejeong (author) / Tezdogan, Tahsin (author) / Incecik, Atilla (author)
Applied Ocean Research ; 123
2022-04-01
Article (Journal)
Electronic Resource
English
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