风帆阵列气动干扰特性数值分析

Numerical Analsis of Aerodynamic Characteristics between Aligned Sails

针对某远洋散货船设计一套风帆阵列。为了研究风帆之间的相互干扰现象,利用CFD软件对单帆和风帆阵列的空气动力学特性进行数值模拟,分析风帆之间的干扰特征。结果表明,尽管变化趋势一致,但由于风帆阵列存在帆间的流场干扰,每只风帆的升/阻力系数都较单个风帆要小,特别是在攻角大于25°时,最大值相差30%左右,且阻力系数下降较快,这为风帆的实船布置和应用提供了参考。

A set of aligned sails is designed for an ocean-going bulk carrier on the maindeck. To analysis the disturbance between these aligned sails the dynamic characteristics ofthe sails were simulated with CFD software. It is proved that the lift and drag coefficientshave the same tend against attack angle with that of a single sail, but the disturbance betweenthe aligned sails does exist. This disturbance could induce less lift and drag coefficients of thesail by 30 percent compared to a single sail, especially under larger attack angles beyond 25°.These results could provide reference for the practical application of sails on board ship.