网格因素对三体滑行艇阻力计算影响探究

Influence of mesh on resistance calculation of trimaran planing hulls

为获得三体滑行艇的阻力及其他水动力性能比较精确的计算结果,采用粘性流体力学软件STAR-CCM+,依据网格离散的特点,分别讨论了船体表面网格尺寸、近船面网格节点分布、船体周围加密区网格尺寸以及变形网格技术四个因素对三体滑行艇阻力计算精度、收敛速度和稳定性的影响。通过一系列计算、分析,提出适合三体滑行艇阻力计算的网格划分方案,经验证与试验值有较好的符合度。

In order to achieve more accurate results in resistance and other hydrodynamic performance of trimaran planing hulls, the viscous fluid dynamics software STAR-CCM+ was used. According to the characteristics of mesh discretization, it explores the inlfuence of four factors, the grid size on hull surface, the distribution of grid nodes near the hull, the grid size in the reifned area around the hull and the deforming grid technique, on the accuracy of resistance calculation, convergence rate, and stability. Through a series of calculation analysis, a meshing scheme for the resistance calculation of the trimaran planing hulls is proposed to provide validated results in good agreement with the experimental data.