窄缝共振对波能装置-防波堤混合系统的影响

The influence of narrow gap resonance on the wave energy converter-breakwater integrated system

为研究窄缝间波共振对双浮体型振荡浮子式波能转换装置与浮式防波堤混合系统的影响,本文应用粘性计算流体动力学软件Star-CCM+建立二维数值模型模拟波浪与双浮体浮式防波堤型波能装置的相互作用。研究了装置的波能转换性能、防波性能、浮体窄缝间波面变化和波共振对装置性能的影响,并研究了波浪能浮子运动和浮体间距对窄缝间波共振频率以及波面变化的影响。研究结果表明:窄缝间波共振显著提高了双浮体浮式防波堤型波浪能装置的波能转换性能,窄缝间波共振频率随着浮体间距离和波浪能浮子吃水的增大而减小,窄缝间波高随着波浪能浮子宽度的减小而增大。

The effects of wave resonance in the narrow gap on the integrated system consisting of a dual floating body oscillating wave energy converter(WEC) and a floating breakwater are studied. A two-dimensional numerical model is established using the viscous computational fluid dynamics software Star-CCM to simulate the interaction between waves and a dual floating body/floating breakwater-type wave energy device. Wave energy conversion performance, wave attenuation performance, wave surface elevations in the gap between floaters, and the effects of wave resonance on the performance of the device are analyzed. The influences of WEC motion and the gap between floaters on the narrow gap resonance frequency and wave elevation are also studied. Results show that the wave energy conversion efficiency of the dual floating body/floating breakwater-type wave energy device is significantly improved due to the wave resonance in the narrow gap. The wave resonance frequency in the narrow gap decreases with the gap between the floaters and the WEC draft increases. Moreover, the wave elevation in the narrow gap increases with decreasing WEC width.