不同参数对双浮体波能装置水动力特性的影响

以双浮体波能装置为研究对象,提出了一套基于ANSYS-AQWA模拟双浮体波能装置振荡运动的计算方法,采用Fortran的二次开发,考虑了线性PTO阻尼的影响,并将运动的数值结果与NREL的试验结果进行对比验证.详细探究了不同参数(波浪参数、发电装置参数和PTO参数)对双浮体波能装置水动力特性的影响.研究结果表明:波浪参数方面,存在1个最优波浪周期,使波能装置的发电功率最大,且增加波高有利于波能的俘获;发电装置参数方面,浮子的吃水、直径及浮筒阻尼板的直径均存在最优值,使能量俘获因子达到最大;PTO参数方面,存在最优阻尼系数,并给出了工程实际中的相对参考值.研究成果可为振荡浮子式双浮体波能装置的研究和设计提供有价值的参考.

Effect of different parameters on hydrodynamic characteristics of double-floating-body wave energy converter

Taking the double-floating-body wave energy converter as the research object, a set of calculation method based on ANSYS-AQWA software was proposed to simulate the oscillating motion of double-floating-body wave energy converter. Fortran′s secondary development was used to consider the influence of linear PTO damping. The numerical results of the motion were compared with the experimental results of NREL(National Renewable Energy Laboratory). The effects of different parameters(wave parameters, power generation device parameters and PTO parameters)on the hydrodynamic characteristics of the double-floating-body wave energy converter were studied in detail. The results show that in terms of wave parameters, there is an optimal wave period, which makes the generating power of wave energy converter reach the maximum, and the increase of wave height is conducive to the capture of wave energy. In terms of power device parameters, there are optimal values for the draft and diameter of upper buoy and the diameter of lower buoy damping plate, which makes the energy capture factor reach the maximum. In terms of PTO parameters, there is an optimal damping coefficient, and the relative reference value in engineering practice is given. The research results will provide valuable reference for the future research and design of the double-floating-body wave energy converter.