NACA0018风帆阵列帆间干扰及影响因素研究

Interactions and influence factors of a NACA0018 sail array

风帆助航是船舶领域减少二氧化碳排放的有效方式之一。本文设计了一种由六面横截面为NACA0018翼型的硬帆组成的风帆阵列,采用数值仿真的方法,在迎风、侧风和顺风三种工况下分析了每面帆的升、阻力特性,通过与单帆对比,探究了帆间干扰对风帆推进性能的影响规律。将实验设计法与方差分析法相结合,评估了多个独立几何参数对风帆阵列推进性能的影响水平。结果表明,独立参数的显著性水平高度依赖于表观风向,并且通过改变风帆布局和采用非一致攻角,可获得比单一攻角时更好的推进性能。该研究有助于寻找影响多帆推进系统推力性能的主要参数,为多帆推进的全局化操纵提供数据支持。

Sail-assisted navigation is one of the effective ways to reduce carbon dioxide emissions in ship industry.In this study,a sail array consisting of six hard sails with a cross section of NACA0018 airfoil was designed.The lift and resistance of each sail were analyzed by numerical simulation under three conditions:upwind,crosswind and downwind.By comparing with the single sail case,the law of inter-sail interference on sail propulsion performance was explored.The confidence level of several independent geometric parameters on the propulsion performance of the sail array was evaluated by combining the experimental design method with ANOVA.The results show that the significance level of the independent parameters is highly dependent on the apparent wind direction.By changing sail layout and using non-uniform angle of attack,the propulsion performance can be better than that of single attack angle.This study is helpful to find the main parameters affecting the thrust performance of a multi-sail propulsion system and support for its global manipulation.