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http://dx.doi.org/10.7837/kosomes.2019.25.7.961

Analysis of Resistance Performance of a Ship having a Large Attitude based on CFD  

Kim, Hyun-Soo (Department of Mechanical Systems Engineering, Tongmyong University)
Park, Dong-Woo (School of Naval Architecture & Ocean Engineering, Tongmyong University)
Yang, Young-Jun (School of Naval Architecture & Ocean Engineering, Tongmyong University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.25, no.7, 2019 , pp. 961-967 More about this Journal
Abstract
This research presents an efficient method based on computational fluid dynamics (CFD) for estimating the resistance performance of a ship with a large settlement amount and a dynamic trim. The settlement of the inviscid flow analysis and the results of dynamic trim were used to set a large attitude for the ship prior to performing a viscous flow analysis; a viscous flow analysis was subsequently performed by Dynamic Fluid Body Interaction (DFBI). This method is termed as method I, in which a simple grating system can be used without employing the overset mesh technique by setting many attitudes before interpretation. Thus, method I is advantageous in reducing calculation time and improving calculation accuracy. The viscous flow analysis was performed using a commercial CFD code STAR-CCM+. Compared with the final convergence result, the first viscous flow analysis result of method I exhibited a variation of less than 1 % of resistance. The result was obtained by changing the gratings each time an attitude is changed at each calculation stage, based on the DFBI method provided to STAR-CCM+ using a simple grating system, which is not a superposed grating. This method is termed as method II. Compared with method II of resistance, method I exhibited a dif erence of 0.03-0.6 % for linear velocity. The results of method I were confirmed to be qualitatively and quantitatively appropriate through comparison with several trillion simulations.
Keywords
Large sinkage and dynamic trim; CFD; Potential flow analysis; Resistance performance; Towing tank model test;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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