A linearized free-surface RANS method for self-propulsion and maneuvering

Numerical prediction of the hydrodynamical performance of unsteady ship operations, such as self-propulsion and maneuvering, is an important method to help naval architects design optimal ship hulls. Currently, traditional finite-volume Computational Fluid Dynamics (CFD) methods offer a well-proven simulation platform to realize such predictions with a high degree of accuracy. In this work, a novel transient CFD method based on an unsteady linearized free-surface RANS solver is presented for the objective of simulating ship maneuvering. The specific results presented in the paper are for the self-propulsion and turning circle of the Korean Containership KCS. The results achieved, show that the new linearized free-surface RANS solver provides a viable and more cost-effective alternative than traditional Volume-of-Fluid (VOF) methods when applied to streamlined bodies, such as displacement hulls. The key new developments highlighted in this paper are in the way that self-propulsion is included and a new robust mesh motion method to handle the relative motion of the rudder.

Schlagworte

Maneuvering

PMM

Propeller

RANS

Resistance

Rudder

DDC Class

600: Technik

620: Ingenieurwissenschaften

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http://rightsstatements.org/vocab/InC/1.0/

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paper_0077_file_0416_A_Linearized_Free_Surface_RANS_Method_for_Self_Propulsion_and_Ma.pdf

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A linearized free-surface RANS method for self-propulsion and maneuvering