Abstract: The computational fluid dynamics (CFD) method has been adopted to optimize the twin-skeg hull line of the twin-skeg Ro-Ro ship from the wake uniformity and the resistance in view of the technical problem that it is difficult to optimize the stern line of the twin-skeg ships. The wake objective function and the average wake fraction proposed by MARIN are used as the evaluation criterion for the wake uniformity. It analyzes the effects of the angle of run of the skeg at 0.8R above the stern shaft, the fillet radius for the skeg, and the distance between the propeller disk and the stern shaft outlet on the wake uniformity and the resistance. The results show that with the basically constant ship form parameters, the variation of the skeg characteristic parameters will cause the change of the wake uniformity, average wake fraction and resistance. The twin-skeg hull lines are also optimized by the comparative analysis.

Key words: computational fluid dynamics(CFD), twin-skeg ship, skeg characteristic parameters, wake uniformity, resistance performance

摘要： 针对双尾鳍船型尾部型线难以优化的技术难题,该文以某一双尾鳍滚装船为研究对象,采用CFD方法,从伴流均匀度与阻力性能角度对双尾鳍线型进行优化,并以荷兰MARIN水池提出的伴流目标函数（WOF）与平均伴流分数（$\bar{w}$）作为伴流均匀度的评判衡准,分析了尾轴以上0.8R处的尾鳍去流角、尾鳍导圆半径、桨盘与尾轴出口端的距离对船尾伴流场均匀度及阻力性能的影响。研究结果表明：在船型参数基本保持不变的情况下,尾鳍特征参数的改变会引起船尾伴流均匀度、平均伴流分数与阻力性能的变化,并通过对比分析,对双尾鳍型线进行优选。

关键词: CFD方法, 双尾鳍船, 尾鳍特征参数, 伴流均匀度, 阻力特性