This research proposes a new type of vessel assisted propulsion device, which is a polygonal sail composed of sails and cylinders, and the sail is essentially a super large Flettner rotor that can be deformed. The main structure of the device is modelled using SolidWorks software and a three-dimensional computational domain containing the polygonal sails is established to analyses the beneficial effects that the polygonal sails provide to the vessel. The polygonal sail is simulated and calculated using CFD commercial code under various working conditions. A comparative analysis of the lift coefficients and drag coefficients for nine groups shapes of polygonal sails, which found that the greater number of the sail sides, the greater the lift coefficient. After a comprehensive comparison, it is concluded that the 16-sided sail has better practical application value for a 300000-ton tanker. Further numerical simulations are operated for the model of 16-sided sail, and the maximum lift that the sail can provide to the vessel is 590 kN. When the spin ratio k is 1, 8-level wind conditions, the maximum propulsive power of the sail is 2005 kW. In addition, the Reynolds number is also one of the main factors affecting the force coefficient of a polygonal sail. As the Reynolds number increases, the lift-to-drag ratio of the sail becomes smaller.

这项研究提出了一种新型的船舶辅助推进装置，它是由帆和圆柱体组成的多边形帆，帆本质上是一个可以变形的超大型弗莱特纳转子。装置主体结构采用SolidWorks软件建模，建立包含多边形风帆的三维计算域，分析多边形风帆对船舶的有益效果。多边形帆在各种工作条件下使用CFD商业代码进行模拟和计算。对九组多边形帆的升力系数和阻力系数进行对比分析，发现帆边数越多，升力系数越大。综合比较后，结论是16面帆对30万吨级油轮具有较好的实际应用价值。对16面帆模型进行了进一步的数值模拟，帆可为船舶提供的最大升力为590 kN。当自旋比k为1，8级风况，帆的最大推进功率为2005千瓦。此外，雷诺数也是影响多边形帆受力系数的主要因素之一。随着雷诺数的增加，帆的升阻比变小。