摘要
振荡浮子式波能发电装置是一种典型的波能发电装置,浮子的水动力学特性对波浪能发电装置吸波性能有直接的影响。采用数值仿真方法研究了几个经典底部形状的圆柱体浮子在固有周期下的水动力学特性,并讨论了浮子直径d与吃水h之比(d/h)对平底圆柱体浮子水动力学特性的影响。仿真结果显示,可通过自由衰减试验测试浮子在固有周期下的水动力学特性:扁平浮子固有周期短、辐射阻尼大,不利于吸波;细长浮子辐射阻尼小,且对底部形状不敏感,所以可选用平底面;适当增加浮子吃水深度,可以提高浮子固有周期,在常遇波况内实现与来波共振,提高波能系统吸收波浪能效率。研究结果可为浮子设计提供理论依据。
Oscillating float wave energy converter(WEC) is a typical wave energy generator. The wave absorption performance of WEC with natural period is influenced by the hydrodynamic characteristics of the float, which are studied in this paper in respect to several cylindrical floats with classical bottom shapes under natural period by numerical simulation method.The influence of d/h on the hydrodynamic characteristics of flat bottom cylindrical floats is discussed.The simulation results show that the free attenuation test can be used to test the hydrodynamic characteristics of the float with natural period.The flat float has a short natural period and large radiation damping,so it is not conducive to wave absorption.The slender float has low radiation damping and is not sensitive to the bottom shape,so a flat bottom surface can be selected.Properly increasing the draft of the float can increase the natural period of the float, achieve resonance with the incoming wave in frequently encountered wave conditions,and improve the efficiency of wave energy absorption of the wave energy system.The research results provide a theoretical basis for float design.
作者
熊必康
邓胜忠
石祥宇
霍银泉
刘洋
蔡元奇
XIONG Bikang;DENG Shengzhong;SHI Xiangyu;HUO Yinquan;LIU Yang;CAI Yuanqi(China Nuclear Power Technology Research Institute Co.,Ltd.,Shenzhen 518000,China;School of Civil and Architectural Engineering,Wuhan University,Wuhan 430072,China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2021年第7期594-600,共7页
Engineering Journal of Wuhan University
基金
中广核2020年度尖峰计划项目(编号:R-2020ZBSEC003)。
关键词
振荡浮子
水动力学特性
固有周期
自由衰减
数值仿真
oscillating float
hydrodynamic characteristics
natural period
free attenuation
numerical simulation
