复杂圆柱型波能装置能量转换特性研究  

Wave-power conversion characteristics of a complex vertical cylinder

作　　者：吴必军[1] 盛松伟[1] 张运秋[1] 游亚戈[1] 

机构地区：[1]中国科学院广州能源研究所可再生能源与天然气水合物重点实验室,广东广州510640

出　　处：《哈尔滨工程大学学报》2010年第8期1023-1028,共6页Journal of Harbin Engineering University

基　　金：国家863计划资助项目(2009AA05Z428);"十一五"国家科技支撑计划基金资助项目(2008BAA15B01)

摘　　要：针对波能装置转换效率优化问题,基于线性规则波理论和粘性阻尼建立了复杂圆柱形振荡浮子的一维运动方程,从而得到了振荡浮子的固有频率和阻尼因素表达式,并推导了最佳阻尼和最佳弹簧下波能装置的最优转换效率表达式.研究中采用分离变量法得到了整个无限区域的势函数表达式及振荡浮子附加质量、阻尼系数和波浪激励力表达式.数值计算发现,在某些工况和波浪频率下,振荡浮子的阻尼系数为负值,理论上说明波能装置有发生尖锐共振的条件,此时波能装置将吸收无穷多的波浪能量.Efficiency is an important aspect of research into effective ways to convert ocean waves into energy.Based on linear regular wave theory and viscous damping,a one-dimensional equation of motion was derived for a complex cylinder used as a wave energy conversion device.The natural frequency and the damping ratio of the cylinder was analyzed and the maximum useful power that could be absorbed by the device was calculated.Expressions for velocity potential,added mass,damping coefficient and exciting forces were derived by use of an eigenfunction expansion approach.Numerical calculations indicated that under some operating modes and wave frequencies,the damping coefficient of the cylinder was negative.In theory the device can experience sharp resonance and absorb infinitely large wave energy when the damping coefficient is negative.

关 键 词：波浪能 线性波理论 振动特性 尖锐共振 复杂圆柱 

分 类 号：TV135[水利工程—水力学及河流动力学]