静水中并行两船水动力干扰数值研究

为比较分析单船与两船并行航行的水动力差异，探讨静水中两船并行时漂角、船船相对位置对船体阻力、侧向力及摇首力矩的影响规律，文章基于RANS方程采用SST k-棕湍流模型，数值分析了某两船静水并行时船船相互作用。研究表明：不同漂角下两船中对中并行时，船体所受阻力均较单船航行时有所增大且受到指向两船中间的附加侧向力；当两船并行斜航的漂角相反时，同一船舶位于迎流侧较背流侧时船体受力存在一定差异；两船并行直航时，船船相对位置对船体受力有较大的影响，当两船纵向间距小于一倍船长时，船船相互作用较为显著，在不同横向间距下，船体受力随纵向间距的变化规律相同，在一定纵向间距下，船间横向间距越小船船相互作用越强。

Numerical Study on the Hydrodynamic Interaction of Ship-ship Models in Calm Water

This work is focused on the hydrodynamic comparison between the single ship and two ships advancing parallel in calm water and the laws of the resistance, lateral force and yaw moment under the influence of the drift angle and relative location for two-ship models. Based on SST k-ωturbulence model, the Reynolds averaged N-S equations are adopted to analyze the ship-ship interaction effects numerically. The results show that: 1) For the ships advancing obliquely in calm water, the resistance of a ship model with another one in close proximity is increased to a certain degree compared with the single-ship sailing case and the lateral forces acted on the two-ship models point towards the fluids between the ship sides; 2) If two-ship models are advancing parallel with opposite drift angles, there is a certain difference of the hydrodynamic pressure distributions when the ship located in the up-flow and back-flow sides; 3) If two-ship models are in a stand-on course, the relative location exerts a great effect on the hydrodynamic force. The ship-ship interaction effects are remarkable for the case that the longitudinal separation between two ships is less than the ship length. At different transversal separations, variation laws of the ship-ship hydrodynamic forces show the same dependence on longitudinal separations. Similarly, the interaction effects of two ship models are more significant along with the smaller transversal separation at the same longitudinal separation.