Numerical simulation of the free-running of a ship using the propeller model and dynamic overset grid method

IF 1.4 Q3 ENGINEERING, MARINE
K. Ohashi, Hiroshi Kobayashi, T. Hino
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引用次数: 9

Abstract

ABSTRACT An unsteady Reynolds averaged Navier-Stokes (URANS) solver to estimate the trajectory on the free-running condition of a conventional ship is developed. Ship motions are obtained by solving the motion equations and accounted for by the moving grid technique. Propeller effects are accounted for by the body forces that are derived from the propeller model, which is based on the potential theory. The prescribed rudder motions of typical free-running conditions are accounted for using the dynamic overset grid method, in which the overset information is updated at each temporal step by implementing the existing overset grid method as the numerical library. The flow around the ship hull during the turning motions is analysed, and strong interactions between the ship hull and rudder in the propeller accelerated flows are observed. Through comparisons, the present method shows its applicability to compute the flow around a ship in free-running motion.
采用螺旋桨模型和动态超调网格法对船舶自由航行进行数值模拟
摘要建立了一个非定常雷诺平均Navier-Stokes(URNS)求解器,用于估计常规船舶在自由航行条件下的轨迹。船舶运动是通过求解运动方程获得的,并通过移动网格技术进行计算。螺旋桨效应是由基于势能理论的螺旋桨模型得出的机身力来解释的。使用动态过置网格方法来考虑典型自由运行条件下的规定舵运动,其中通过将现有的过置网格法作为数值库来在每个时间步长更新过置信息。分析了船体在转弯运动中的流动,并观察到螺旋桨加速流中船体和方向舵之间的强烈相互作用。通过比较,表明该方法适用于自由航行船舶的绕流计算。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ship Technology Research
Ship Technology Research ENGINEERING, MARINE-
CiteScore
4.90
自引率
4.50%
发文量
10
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