底部铰接浮力摆波能转换装置模型实验

Experimental study of bottom-hinged flap wave energy converters

本文对波浪条件和质量分布对底部铰接的浮力摆式波能转换装置的水动力性能的影响进行了实验研究,该装置的能量提取系统由激磁电流控制的磁粉制动器和扭矩传感器两部分组成。通过实验结果和数值结果的对比,验证了实验布置的合理性;分析了波浪条件和质量分布对俘获宽度比η和浮力摆板表面的动水压强P的影响。结果表明,俘获宽度比随着波幅的增加而减小,动水压强随着波幅的增加而增大;在短波情况下,当摆板最下面两层充满水时,俘获宽度比较大,动水压强明显较小;在长波情况下,当摆板最下面一层充满水时,俘获宽度比较大,动水压强也明显较小。

This paper presents an experimental study on hydrodynamic performance of a bottom-hinged flap wave energy converter in different conditions and different swing flap mass distributions. The device is composed of a magnetic power extracting system that is controlled with magnetizing current and a torque sensor. The swing flap is a hollow structure vertically divided into five separate chambers, and its mass distribution can be controlled by filling water into different chambers. The design of experiment was verified by comparing experimental and numerical results; the effects of wave condition and flap mass distribution on the captured power-width ratio of the converter and the dynamic pressure on the swing flap surfaces were analyzed. The results indicate that with the increasing wave amplitude, the captured power-width ratio decreases and the flap dynamic pressure increases. And a larger captured power-width ratio and lower dynamic pressure will occur when either the two bottom flap chambers are filled up with water in the case of short waves or only the bottom one is filled up in the case of long waves.