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ISSN : 1229-3431(Print)
ISSN : 2287-3341(Online)
Journal of the Korean Society of Marine Environment and Safety Vol.30 No.6 pp.658-667
DOI : https://doi.org/10.7837/kosomes.2024.30.6.658

A Numerical Study of the Effect of Skegs on the Course-keeping Ability of a Catamaran

Michael*, Jun-Taek Lim**, Gyoung-Woo Lee***, Kwang-Cheol, Seo***†
*, **Graduate School of Mokpo National Maritime University, Mokpo 58628, Korea
***Department of Naval Architecture & Ocean Engineering, Mokpo National Maritime University, Mokpo 58628, Korea

Abstract

Maneuverability is a critical hydrodynamic performance metrics of a ship. This study numerically evaluated the course-keeping ability of a 24 m shallow draft catamaran, equipped with skegs installedon it, was numerically to assess whether the skegsthese appendages improved its maneuverability. Computational fluid dynamics simulations were conducted to simulate virtual captive model tests. Pure-sway and pure-yaw motions were assessed as part of harmonic tests conducted in the planar motion mechanism were at the design speed. An empirical formula was proposed for to evaluate the course-keeping ability (as measured quantified by a criterion, termed the C index) was suggested and assess the maneuverability. The results demonstrated that the initial condition of the bare hull had exhibited a relatively poor C index, and the installation of Skeg 1 did not address resolve this issue, judging by the negative value of C. On the other handConversely, Skegs 2, 3, and 4 yielded positive C index values, could address this problem, as judged by thesthey yielded, which indicatinged that the hull could yaw or change its heading more easilyeffectively, as opposed to drifting in sway motions.

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