Experimental Study on the Spring-like Effect on the Hydrodynamic Performance of an Oscillating Water Column Wave Energy Converter

被引:0
作者
Yuan, Ning [1 ]
Xu, Chuanli [1 ]
Liu, Zhen [1 ,2 ,3 ,4 ]
机构
[1] Ocean Univ China, Shandong Prov Key Lab Ocean Engn, Qingdao 266100, Peoples R China
[2] Ocean Univ China, Qingdao Municipal Key Lab Ocean Renewable Energy, Qingdao 266100, Peoples R China
[3] Rizhao Port Grp, Rizhao 276826, Peoples R China
[4] Ocean Univ China, Ctr Ocean Carbon Neutral, Qingdao 266100, Peoples R China
基金
中国国家自然科学基金; 国家重点研发计划;
关键词
wave energy; oscillating water column; spring-like effect; air compressibility; hydrodynamic performance; AIR TURBINES; SCALE; CONVERSION; PRESSURE; FLOW;
D O I
10.3390/jmse12081327
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
The oscillating water column (OWC) wave energy converter has demonstrated significant potential for converting ocean wave energy. The spring-like effect of air compressibility can significantly affect the hydrodynamic behavior of the device, but it has rarely been investigated through experimental studies. In this study, an experimental test on a model-scaled OWC device was carried out in a wave flume using a series of regular and irregular waves. The spring-like effect was taken into account by the combination of the air chamber with an additional air reservoir of appropriate volume, where the total volume was scaled according to the square of the Froude scale. The hydrodynamic performance was compared with the results obtained without considering the spring-like effect. A phase difference between the air pressure and airflow rate was observed when employing the additional air reservoir. The amplitudes of free surface elevation and airflow rate increased, while the air pressure was reduced when the spring-like effect was considered. The results demonstrate that failure to consider the spring-like effect can lead to overestimation of the hydrodynamic efficiencies, and the errors were mainly affected by the incident wave frequency.
引用
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页数:16
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