Validation of a CFD-based numerical wave tank model for the power production assessment of the wavestar ocean wave energy converter
Validation of a CFD-based numerical wave tank model for the power production assessment of the wavestar ocean wave energy converter
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DOI：
10.1016/j.renene.2019.08.059
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发表时间：
2020-02
期刊：
影响因子：
8.7
通讯作者：
C. Windt;J. Davidson;E. Ransley;D. Greaves;M. L. Jakobsen;M. Kramer;J. Ringwood
中科院分区：
文献类型：
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作者：
C. Windt;J. Davidson;E. Ransley;D. Greaves;M. L. Jakobsen;M. Kramer;J. Ringwood
基于CFD的数值波浪水池(CNWT)模型是分析波浪能量转换器(WEC)的有用工具。在CNWT的开发过程中，为了证明数值解的准确性，模型的验证是至关重要的。本文对1：5比例尺的波星点吸收装置的CNWT模型进行了广泛的验证研究。Ransley等人之前报道的研究。[1]和Windt et al.文[2]的结论进行了推广，将动力输出(PTO)系统包含在模型中。在这项研究中，PTO被表示为一个线性弹簧-阻尼器系统，提供了一个很好的近似完整的PTO动力学。通过对PTO位置、速度和力的实验数据进行线性最小二乘拟合，确定了PTO数值模型中的弹簧刚度和阻尼系数。对自由表面高度、PTO数据(位置、速度、力)、WEC船体上的发电功率和压力的数值计算结果与实验测量结果吻合较好。
CFD-based numerical wave tank (CNWT) models, are a useful tool for the analysis of wave energy converters (WECs). During the development of a CNWT, model validation is vital, to prove the accuracy of the numerical solution. This paper presents an extensive validation study of a CNWT model for the 1:5 scale Wavestar point-absorber device. The previous studies reported by Ransley et al. [1] and Windt et al. [2] are extended in this paper, by including cases in which the power-take off (PTO) system is included in the model. In this study, the PTO is represented as a linear spring-damper system, providing a good approximation to the full PTO dynamics. The spring stiffness and damping coefficients in the numerical PTO model are determined through a linear least squares fit of the experimental PTO position, velocity and force data. The numerical results for free surface elevation, PTO data (position, velocity, force), generated power and pressure on the WEC hull are shown to compare well with the experimental measurements.