Abstract
The main objective of this study is to investigate the turning and zig zag maneuvering performance of the well known naval surface combatant DTMB (David Taylor Model Basin) 5415 hull with URANS (Unsteady Reynolds averaged Navier Stokes) method. Numerical simulations of static drift tests have been performed by a commercial RANS solver based on a finite volume method (FVM) in an unsteady manner. The fluid flow is considered as 3 D, incompressible and fully turbulent. Hydrodynamic analyses have been carried out for a fixed Froude number 0.28. During the analyses, the free surface e ffects have been taken into account using VOF (Volume of Fluid) method and the hull is considered as fixed. First, the code has been validated with the available experimental data in literature. After validation, static drift, static rudder and drift and r udder tests have been simulated. The forces and moments acting on the hull have been computed with URANS approach. Numerical results have been applied to determine the hydrodynamic maneuvering coefficients, such as, velocity terms and rudder terms. The acc eleration, angular velocity and cross coupled terms have been taken from the available experimental data. A computer program has been developed to apply a fast maneuvering simulation technique. Abkowitz’s non linear mathematical model has been used to calc ulate the forces and moment acting on the hull during the maneuvering motion. Euler method on the other hand has been applied to solve the simultaneous differential equations. Turning and zig zag maneuvering simulations have been carried out and the maneuv ering characteristics have been determined and the numerical simulation results have been compared with the available data in literature. In addition, viscous effects have been investigated using Eulerian approach for several static drift cases.
Original language | English |
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Pages (from-to) | 435-460 |
Number of pages | 26 |
Journal | Ocean Systems Engineering |
Volume | 7 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2017 |
Bibliographical note
Publisher Copyright:© 2017 Techno-Press, Ltd.
Keywords
- Cfd (computational fluid dynamics)
- Drift
- Dtmb 5415
- Hydrodynamic derivatives
- Ship maneuvering
- Turning circle
- Viscous effects
- Wave deformations
- Zig zag maneuver