ABSTRACT

The study presents numerical investigations on hydrodynamic quality of high-speed planing hull with spray rails and interceptor. Interceptors are blades which extend vertically downwards at the bottom near transom. The pressure distribution is the main cause for reduction in trim of the vessel. The interceptor has an effect on vessel resistance reduction which further result in more desirable trim control. The hull model was analysed with interceptor at different heights based on Finite Volume method using dynamic mesh. The two degrees-of-freedom considered is heave and pitch. The model tests are performed in the current towing tank facility available in the Department of Ocean Engineering, Indian Institute of Technology, Madras for the planing hull with and without interceptor in calm water. The height of interceptor plays an important role on the vessel performance. The study shows better trim reduction with consequent decrease in total resistance of vessel in planing regime.

摘要

该研究提出了带有喷水轨和拦截器的高速滑行船体水动力质量的数值研究。拦截器是刀片，在靠近尾板的底部垂直向下延伸。压力分布是减少容器修整的主要原因。拦截器对减小容器阻力有影响，这进一步导致更理想的修整控制。基于有限体积法，使用动态网格，在不同高度使用拦截器分析船体模型。所考虑的两个自由度是起伏和俯仰。模型测试是在Madras印度理工学院海洋工程系现有的拖船设施中进行的，用于在平静水中有或没有拦截器的滑行船体。拦截器的高度对船只的性能起着重要的作用。研究表明，在平整状态下，减少的修整效果更好，从而降低了船的总阻力。