Numerical Analysis of the Behaviour of Vessels Advancing through Restricted Shallow Waters

Date

2018-04-25

Author

Tezdoğan, Tahsin
Terziev, Momchil
Oğuz, Elif
İncecik, Atilla

Metadata

Show full item record

Item Usage Stats

75
views

0
downloads

Upon entering shallow waters, ships experience a number of changes due to the hydrodynamic interaction between the hull and the seabed. Some of these changes are expressed in a pronounced increase in sinkage, trim and resistance. In this paper, a numerical study is performed on the Duisburg Test Case (DTC) container ship using Computational Fluid Dynamics(CFD), the Slender-Body theory and various empirical methods. A parametric comparison of the behaviour and performance estimation techniques in shallow waters for varying channel cross-sections and ship speeds is performed. The main objective of this research is to quantify the effect a step in the channel topography on ship sinkage, trim and resistance. Significant differences are shown in the computed parameters for the DTC advancing through dredged channels and conventional shallow water topographies. The different techniques employed show good agreement, especially in the low speed range.

Subject Keywords

Ship squat, CFD, Ship resistance, Trim and sinkage, Slender Body Theory

URI

http://www.int-nam.yildiz.edu.tr/2018/cd/INT-NAM_2018_e_Proceedings.pdf
https://hdl.handle.net/11511/76328

Conference Name

3rd International Naval Architectureand Maritime Symposium (24-25 Nisan 2018)

Collections

Department of Civil Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Numerical investigation of the behaviour and performance of ships advancing through restricted shallow waters Terziev, Momchil; Tezdogan, Tahsin; Oğuz, Elif; Gourlay, Tim; Demirel, Yigit Kemal; Incecik, Atilla (2018-01-01) Upon entering shallow waters, ships experience a number of changes due to the hydrodynamic interaction between the hull and the seabed. Some of these changes are expressed in a pronounced increase in sinkage, trim and resistance. In this paper, a numerical study is performed on the Duisburg Test Case (DTC) container ship using Computational Fluid Dynamics (CFD), the Slender-Body theory and various empirical methods. A parametric comparison of the behaviour and performance estimation techniques in shallow wa...
Design and performance analysis of a counter rotating propeller Öztürk, Sercan; Aksel, Mehmet Haluk; Department of Mechanical Engineering (2022-12) Whether it is a large container ship or a submarine operating at depths of hundreds of meters, propellers are in action to advance in the water. Counter-rotating propeller, abbreviated as CRP, is a combined propulsor where the propellers, called forward and aft, are placed one behind another and rotate in opposite directions. The main advantages of a CRP are increased efficiency due to less fuel consumption than a single propeller and torque cancellation phenomena by rotations in opposite directions. In the...
Navigation and path planning of an unmanned underwater vehicle Gül, Uğur Doğan; Leblebicioğlu, Mehmet Kemal; Department of Electrical and Electronics Engineering (2012) Due to the conditions peculiar to underwater, distinctive approaches are required to solve the navigation and path planning problem of an unmanned underwater vehicle (UUV). In this study, first of all, a detailed 6 degrees-of-freedom (DOF) mathematical model is formed, including the coupled non-linear forces and moments acting on an underwater vehicle. The hydrodynamic coefficients which correspond to the geometry of the vehicle which the model is based on are calculated using the strip theory. After the ma...
Numerical simulation of wave-induced scour and backfilling processes beneath submarine pipelines Fuhrman, David R; Baykal, Cüneyt; Sumer, B Mutlu; Jacobsen, Niels G; Fredsoe, Jorgen (2014-12-01) A fully-coupled hydrodynamic/morphodynamic numerical model is presented and utilized for the simulation of wave-induced scour and backfilling processes beneath submarine pipelines. The model is based on solutions to Reynolds-averaged Navier-Stokes equations, coupled with k - omega turbulence closure, with additional bed and suspended load descriptions forming the basis for sea bed morphology. The morphological evolution is updated continuously, rather than being based e.g. on period- or other time-averaging...
Simulation of annual plankton productivity cycle in the Black Sea by a one-dimensional physical-biological model Oğuz, Temel; Ducklow, H; MalanotteRizzoli, P; Tuğrul, Süleyman; Nezlin, NP; Ünlüata, Ü (American Geophysical Union (AGU), 1996-07-15) The annual cycle of the plankton dynamics in the central Black Sea is studied by a one-dimensional vertically resolved physical-biological upper ocean model, coupled with the Mellor-Yamada level 2.5 turbulence closure scheme. The biological model involves interactions between the inorganic nitrogen (nitrate, ammonium), phytoplankton and herbivorous zooplankton biomasses, and detritus. Given a knowledge of physical forcing, the model simulates main observed seasonal and vertical characteristic features, in p...

Citation Formats

T. Tezdoğan, M. Terziev, E. Oğuz, and A. İncecik, “Numerical Analysis of the Behaviour of Vessels Advancing through Restricted Shallow Waters,” presented at the 3rd International Naval Architectureand Maritime Symposium (24-25 Nisan 2018), İstanbul, Turkey, 2018, Accessed: 00, 2021. [Online]. Available: http://www.int-nam.yildiz.edu.tr/2018/cd/INT-NAM_2018_e_Proceedings.pdf.