压水板式后弯管波浪能发电装置的试验研究

Experimental study on Backward Bent Duct Buoy wave energy converter with a plate

提出了一种带有压水板的新颖后弯管波浪能发电装置,旨在提高后弯管波浪能发电装置的俘获宽度比,拓宽装置响应频宽。建立了压水板式装置物理模型,并在波浪水槽中开展物理模型试验,通过气压测量结合流量–气压关系式计算得到装置俘获转换的气动能量。研究了喷嘴比、锚泊点位置、吃水深度对装置性能的影响,并对比了一系列波浪要素条件下压水板式装置与常规型式装置的性能。发现在测试波周期范围内压水板式装置的最大俘获宽度比常规型式的大13.8%,俘获宽度比>70.0%的频响宽度比常规型式的宽21.9%,压水板实现了增效宽频作用。

This study develops a novel Backward Bent Duct Buoy(BBDB) Oscillating Water Column(OWC) wave energy conversion device with a plate to improve Capture Width Ratio(CWR) and widen response frequency band width. To examine its performance and the effect of the plate, this study tests its physical model in a wave tank and calculate its pneumatic energy conversion through air pressure measurement and using a formula of the flow rate-air pressure relationship. Its behaviors are examined for the conditions of various orifice area ratios, mooring locations, and drafts;and compared with those of a conventional BBDB-OWC converter under a set of wave conditions. The results reveal that this device has the maximum CWR 13.8% larger and its wave frequency range of CWR > 70.0% is widened by 21.9%. Thus, the plate helps improve CWR and response frequency band width.