Calculation Method for Propulsive Performance of Ship in Regular Wave

所得结果如下：1.改进了规则波中船舶附加阻力和运动的计算方法。利用三台小型螺旋桨测速仪可以测量短波长规则波中船舶(货轮和油轮)螺旋桨面上的尾迹分布。标称尾迹分数随波长的增加而减小。使用相同的船型。进行了小尺寸模型(L=2.50m)的抗力试验和变荷载试验，得到了较为可靠的结果。编制了短波规则波(波高长比=0.2~0.7)下船舶推进性能计算程序(数学船型)。计算结果解释了实验结果。我们开发了一个CFD程序来模拟船舶在规则波中前进时的流场。改进了规则波中船舶附加阻力的计算方法。我们测量了波浪中作用在船首喇叭上的阻力。

The results obtained during, the term are as follows.1 : We improved the methods to compute the added resistance and motions of ships in regular waves.2. We could measure the wake distribution at propeller plane of ship (cargo liner and tanker) in regular wave with short wave length by using three small propeller-type velocimeters. The nominal wake fraction decreases with increase of wave length.3. Using same ship models. we performed the resistance and load-varying tests and the reliable results are obtained with small size models (L=2.50m).4. We developed a program to calculate the propulsive performance of ship (mathematical hull form) in regular wave with short wave length (wave height-length ratio = 0.2-0.7). The calculated results explain the experimental ones.5. We developed a CFD code to simulate the flow field around a ship advancing in a regular wave.6. We improved the methods to calculate the added resistance of ship in regular wave.7. We measured the resistance acting on the bow flare of a ship in waves.