Reduction of Fluid Resistance Acting on Ships by Using Hydrodynamic

在目前的研究中，减少流体阻力在船舶上的作用是被讨论的，它是基于主要外壳和附着部分之间的氢动力学相互作用，如气泡、翅膀、尖峰或发射器。对氢动力学相互作用的调查是通过实验进行的，在一个循环水通道中进行抵抗测试和/或可视化方法，并以数值为基础的潜在理论，如Rankine源方法或Morino的面板方法。正如目前研究的主要主题一样，接下来的研究工作也被讨论了。优化弓泡，以最小化波浪产生抵抗力[单罩]，并通过中线外气泡减少波浪产生抵抗力（双灯泡） [单罩]·通过灯泡安装在中央平面上的卡塔马兰[卡塔马兰]的波浪产生抵抗力的减少·带有冲锋枪或赞助商[多罩]的多罩容器的波浪产生特性的减少·通过火花附着在前弓[单罩]的波浪产生抵抗力的减少“用蓝色的弓遮住”在箱子排除了最后一个，在高速的容器上设计的波浪产生抵抗力可以减少。特别是，在第一种情况下，气泡形状，因此船舶的主体是通过Rankine源方法和非线性编程来优化的。在最后一个中，破坏波的现象可以通过峰值的含义来改变，并且它的可用性可以减少破坏波的抵抗力是一个调查的实验。

In the present studies, reduction of fluid resistance acting on ships is discussed, which is based on hydrodynamic interactions between the main hull and attached parts like a bulb, a wing, a spike or an outrigger. Investigations on hydrodynamic interactions are carried out experimentally by resistance tests in a towing tank and/or visualization methods in a circulating water channel and numerically by panel methods based on potential theories like Rankine source method or Morino's panel method. As the main themes of the present studies, the following research works are discussed.・Optimization of bow bulb to minimize wave making resistance [Mono-hull]・Reduction of wave making resistance by off centerline bulbs (twin bulbs) [Mono-hull]・Reduction of wave making resistance by bulbs installed on center plane of catamaran [Catamaran]・Wave making characteristics of multi-hull vessels with outriggers or sponsons [Multi-hulls]・Reduction of wave breaking resistance by spike attached in front of bow [Mono-hull with bluff bow]In the cases excluding the last one, the wave making resistance acting on high speed vessels designed at high Froude numbers can be reduced. Especially, in the first case, the bulb shape and the fore body of ships are optimized by means of Rankine source method and the nonlinear programming. In the last one, the wave breaking phenomena can be changed by means of the spike and its availability to reduce the wave breaking resistance is investigated experimentally.