振荡水翼波能回收在船舶节能推进中的应用

在船舶能效设计指数（EEDI）成为国际公约，造船界大力发展绿色船舶技术的背景下，提出了在船体两侧用螺旋弹簧连接振荡水翼，借助船体和水翼在波浪中的摇荡运动回收波浪能产生推力的节能设想.基于势流理论建立了顶浪情况下振荡水翼与船体的频域耦合水动力模型，以一艘集装箱船为例，对水翼 船体系统进行了理论分析和设计探讨，预报了振荡水翼所能产生的推力并分析了水翼对船舶耐波性的影响；利用模型研究了水翼位置、弹簧刚度、浸没深度等参数对波能回收效果的影响.结果表明：水翼位置对船舶的耐波性有较大影响；弹簧刚度则与水翼产生的推力密切相关；而水翼浸没深度的影响十分有限.本研究可为此类绿色船舶设计提供依据和参考.

Application of Wave Energy Recovery by Oscillating Wings in Energy-efficient Ship Propulsion

Under the background of the EEDI becoming an international conventionand the vigorous development of green ship technologies, this paper proposed the concept of connecting a pair of oscillating wings alongside the ship using coil-springs to recover wave energy through the combined motion of the ship and the wings in waves. The coupled interaction between the wings and the ship under head sea condition was solved in the frequency domain based on potential theory. A sample containership was then adopted to study the performance of the proposed concept and to discuss the influence of oscillating wings on ship’s seakeeping performance. Besides, design parameters such as connection position, spring stiffness and submergence depth were studied. The results show that the connection position and the spring stiffness are key factors to determine the produced thrust, while submergence depth has negligible influence. This study can provide some design guidance for this type of green ship.