STUDY ON WAVE ENERGY CONVERSION CHARACTERISTICS OF SERIES TWO-DUCT FLOATING MODEL WITH UNEQUAL CROSS-SECTION

doi:10.19912/j.0254-0096.tynxb.2021-0764

Abstract

Abstract: A new oscillating water column device is proposed, which has two working modes of backward bent duct buoy（BBDB）and straight duct. Through the flume experiments, the influences of working mode, wave period, wave height and weight of the device on the conversion from wave energy to aerodynamic energy are discussed by flume experiment. The flume experiments show that when the model works in the BBDB mode, the Capture Width Ratio （CWR） can reach up to 138.6% under regular waves and 94% under random waves when airflow works bidirectionally, while the CWR can reach up to 113.7% under regular waves and 81.9% under random waves when the airflow in the chamber does work in both directions. When the model works in the straight duct mode, CWR can reach up to 81.1% under regular waves and 66.2% under random waves when the airflow in the chamber does work in both directions, while the CWR can reach up to 53.9% under regular waves and 42.1% under random waves when the airflow in the chamber does work in single direction. In the random wave experiment, the maximum CWR of the BBDB mode and the straight duct mode can reach 3 times and 2 times that of the “Mighty Whale” respectively. Obviously, the working mode of BBDB of the model has higher energy conversion characteristics.

Key words: wave energy, oscillating water column technology, capture width ratio, backward bent duct buoy, straight duct

摘要： 提出一种具有后弯管和直通管2种工作模式的新型振荡水柱装置,并通过水槽实验来探讨做功方式、波周期、波高及质量等因素对该装置从波浪能到气动能量转换的影响。水槽实验表明,当模型工作在后弯管模式下,气室中气流双向做功时,规则波中的俘获宽度比（CWR）最高可达138.6%,随机波中的CWR最高可达94%;气流单向做功时,规则波中CWR最高可达113.7%,随机波中CWR最高可达81.9%。当模型工作在直通管模式下,气流双向做功时,规则波中CWR最高可达81.1%,随机波中CWR最高可达66.2%;气流单向做功时,规则波中CWR最高可达53.9%,随机波中CWR最高可达42.1%。模型在随机波实验中后弯管、直通管工作模式的CWR峰值分别能达到“巨鲸号”的3倍、2倍,显然模型的后弯管工作模式具有更高的能量转换特性。

关键词: 波浪能, 振荡水柱技术, 俘获宽度比, 后弯管, 直通管

CLC Number:

Qin Zizhen, Wu Bijun, Zhang Fuming. STUDY ON WAVE ENERGY CONVERSION CHARACTERISTICS OF SERIES TWO-DUCT FLOATING MODEL WITH UNEQUAL CROSS-SECTION[J]. Acta Energiae Solaris Sinica, 2022, 43(12): 476-481.

覃梓真, 吴必军, 张芙铭. 不等截面串联双管浮体模型波浪能量转换特性研究[J]. 太阳能学报, 2022, 43(12): 476-481.

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