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http://dx.doi.org/10.7837/kosomes.2021.27.5.656

A Study on the Hydrodynamic Performance of High-Speed Vessel with Trim Tab Using Full-Scale CFD Simulation  

Lee, Jonghyeon (Shipbuilding & Marine Simulation Center, Tongmyong University)
Park, Dong-Woo (School of Naval Architecture & Ocean Engineering, Tongmyong University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.27, no.5, 2021 , pp. 656-665 More about this Journal
Abstract
In this study, trim tabs were attached to end of stern hull of a small high-speed vessel of length approximately 10 m and Froude number 1.0 to improve resistance performance and passenger comfort. Before computational fluid dynamics (CFD) simulations to assess the performance according to various geometries of the trim tab, the scale effect had been found through a previous study, so full-scale simulations were performed. The trim tab chord length was set to 0.5 %, 1.0 % and 1.5 % of LPP, and its angle to base line was varied in intervals of 5°. It decreased trim by stern and flotation: the greater the angle and length, the greater was the effect. Then it had pressure resistance decreased and shear resistance increased, and reduction ratio of total resistance varied accordingly. The results of this study indicated that the resistance performance was improved about 27 % at optimal running attitude that was the trim by stern about 1.5°.
Keywords
Small high-speed vessel; Trim tab; Running attitude; Resistance performance; Full-scale simulation; CFD;
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