Analysis of Added Resistance in Short Waves

- Journal title : Journal of the Society of Naval Architects of Korea
- Volume 52, Issue 4, 2015, pp.338-348
- Publisher : The Society of Naval Architects of Korea
- DOI : 10.3744/SNAK.2015.52.4.338

Title & Authors

Analysis of Added Resistance in Short Waves

Yang, Kyung-Kyu; Seo, Min-Guk; Kim, Yonghwan;

Yang, Kyung-Kyu; Seo, Min-Guk; Kim, Yonghwan;

Abstract

In this study, the added resistance of ships in short waves is systematically studied by using two different numerical methods - Rankine panel method and Cartesian grid method – and existing asymptotic and empirical formulae. Analysis of added resistance in short waves has been preconceived as a shortcoming of numerical computation. This study aims to observe such preconception by comparing the computational results, particularly based on two representative three-dimensional methods, and with the existing formulae and experimental data. In the Rankine panel method, a near-field method based on direct pressure integration is adopted. In the Cartesian grid method, the wave-body interaction problem is considered as a multiphase problem, and volume fraction functions are defined in order to identify each phase in a Cartesian grid. The computational results of added resistance in short waves using the two methods are systematically compared with experimental data for several ship models, including S175 containership, KVLCC2 and Series 60 hulls (C_{B} = 0.7, 0.8). The present study includes the comparison with the established asymptotic and empirical formulae in short waves.

Keywords

Added resistance;Rankine panel method;Cartesian grid method;Short-wave approximation;EEDI;

Language

Korean

Cited by

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