A study of a boat's motion is carried out in order to analyze the aerodynamic properties of the optimal sail for obtaining the maximum velocity when sailing to windward. The mechanics study shows the optimal C_L and C_D for a given sail and how the shape of the aerodynamic polar of the sail should be. A parametrical analysis of the aerodynamics of a sail is then carried out varying the maximum camber, position of the maximum camber in the chord direction and position of the maximum camber in the mast direction. The parametric analysis is done numerically with a vortex lattice method (VLM) and experimentally in a wind tunnel. The results show that the influence of the relevant parameters studied can be reduced to the variation of two parameters, A and B, defining the polar of the sail, C_D = B + A~2C_L~2; and the influence of parameters A and B on the maximum VMG obtainable are calculated.
展开▼
机译：为了分析最佳帆的空气动力学特性，以进行向顺风航行时获得最大速度的研究，对船的运动进行了研究。力学研究显示了给定风帆的最佳C_L和C_D，以及风帆的空气动力学极线形状应如何。然后对帆的空气动力学进行参数分析，以改变最大弯度，弦方向上最大弯度的位置以及桅杆方向上最大弯度的位置。参数分析通过涡流格子法（VLM）进行数值模拟，并在风洞中进行实验。结果表明，所研究的相关参数的影响可以减小为两个参数A和B的变化，这两个参数定义了帆的极坐标C_D = B + A〜2C_L〜2；计算参数A和B对可获得的最大VMG的影响。
展开▼
