Development of a Method to Calculate the Propulsive Performance of a Ship

1. 作为朗肯源方法的一种，我们开发了九州大学方法，它带来了稳定和精确的波流。将该方法应用于舰船推进性能问题，阐明了自由表面对舰船推进性能的影响。对威格利和SSPA 720船体模型进行了阻力和自推进流场的测试和测量。然后得到了推进系数和等量尾迹轮廓线。提出了基于势流和边界层近似的船体周围粘性流动计算方法。计算结果与实验结果吻合较好。通过交互式应用。我们开发了一种简单的计算方法来获得全尺寸螺旋桨的特性，并解释了螺旋桨特性的尺度效应。编制了计算双螺旋桨船推进性能的程序代码，阐明了船体、双螺旋桨和双舵之间相互作用的机理。

1. As one of Rankine Source methods, we developed Kyushu Univ. method, which brings the stable and accurate wave flows. Applying that method to the problem of the propulsive performance of a ship, we elucidated the effects of the free surface on the propulsive performance of a ship.2. We carried out the resistance and self-propulsion tests and measurements of flow fields around the sterns of model ships named wigley and SSPA 720 hulls. Then we obtained the propulsion factors and equal wake-contour lines.3. We developed the calculation method of viscous flow around ship hull based on the potential flow and the boundary layer approximation. The calculated results agree well with experimental ones.4. By applying interatively5. We developed the simple calculation method to obtain the characteristics of the full scale propeller and explained the scale effect on propeller characteristics.6. We developed the program code to calculate the propulsive performance of twin screw ship and elucidated the mechanism of interactions among the hull, twin propellers and twin rudders.