Study of the Wave Devouring Propulsion System in the directional waves

吞波推进系统（WDPS）是将波浪能直接转化为推力的装置之一。该系统由船体和水下翼片组成。翼片产生的阻尼力期望船体在波浪中运动减小。此外，阻力增加在波浪中减小，箔片推力可以在波浪中使用。设计了新型双箔WDPS模型，并在波浪槽中进行了试验。研究了定向波中WDPS的特性。从实验结果来看，在波束海条件下的推进速度要快于头海条件。这些结果证明了WDPS在定向波中的广泛适用性。

The wave Devouring Propulsion System (WDPS) is one of devices which converts the wave energy directly into thrust. The system consists of hull and underwater foil. The damping force generated by the foil expects hull motion reduction in waves. Moreover, resistance increases in waves reduced and the foil thrust can use in waves. The new WDPS model with two foils was designed and tested in wave tank. The characteristics of the WDPS in the directional waves were studied. From these experiments, the advancement speed in beam sea condition becomes faster than head sea condition. From these results, widely applicability of WDPS even in the directional waves proved.