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http://dx.doi.org/10.3744/SNAK.2015.52.6.471

Computational and Experimental Studies on Added Resistance of AFRAMAX-Class Tankers in Head Seas  

Oh, Seunghoon (Hyundai Heavy Industries, Co., Ltd.)
Yang, Jinho (Hyundai Heavy Industries, Co., Ltd.)
Park, Sang-Hun (Hyundai Heavy Industries, Co., Ltd.)
Publication Information
Journal of the Society of Naval Architects of Korea / v.52, no.6, 2015 , pp. 471-477 More about this Journal
Abstract
When a ship sails in a seaway, the resistance on a ship increases due to incident waves and winds. The magnitude of added resistance amounts to about 15–30% of a calm-water resistance. An accurate prediction of added resistance in waves, therefore, is essential to evaluate the performance of a ship in a real sea state and to design an optimum hull form from the viewpoint of the International Maritime Organization (IMO) regulations such as Energy Efficiency Design Index (EEDI) and Energy Efficiency Operational Indicator (EEOI). The present study considers added resistance problem of AFRAMAX-class tankers with the conventional bow and Ax-bow shapes. Added resistance due to waves is successfully calculated using 1) a three-dimensional time-domain seakeeping computations based on a Rankine panel method (three-dimensional panel) and 2) a commercial CFD program (STAR-CCM+). In the hydrodynamic computations of a three-dimensional panel method, geometric nonlinearity is accounted for in Froude-Krylov and restoring forces using simple wave corrections over exact wet hull surface of the tankers. Furthermore, a CFD program is applied by performing fully nonlinear computation without using an analytical formula for added resistance or empirical values for the viscous effect. Numerical computations are validated through four degree-of-freedom model-scale seakeeping experiments in regular head waves at the deep towing tank of Hyundai Heavy Industries.
Keywords
Energy Efficiency Design Index; Energy Efficiency Operational Indicator; Added resistance in waves; Rankine panel method; Commercial CFD; Ax-bow; AFRAMAX-Class Tankers;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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