Analysis of performances of a shrouded horizontal axis tidal turbine
Analysis of performances of a shrouded horizontal axis tidal turbine
复制标题
罩式水平轴潮汐涡轮机性能分析
作者：
Huihui Sun;Y. Kyozuka
潮流发电以其清洁、可预测性和可靠性越来越受到人们的关注。在这项研究中采用了一个从风透镜技术的边缘扩散。在计算水槽中对裸涡轮机和带冠涡轮机进行了试验研究，结果表明扩压器对提高潮汐涡轮机性能是有效的。采用计算流体动力学（CFD）方法和叶素动量（BEM）理论对开式涡轮机和带冠涡轮机的性能进行了对比分析。对于叶尖速比在3.0左右的裸涡轮机，CFD和BEM的计算结果与实验结果吻合较好。对于带护罩的涡轮机，计算流体动力学结果未能捕获实验结果，但对于TSR大于3.0的涡轮机，边界元法结果成功。考虑到汽轮机的实际运行情况和计算时间，边界元法是一种比较满意的评价涡轮机性能的方法。
Tidal current power generation is attracting more and more attention these days for its cleanness, predictability and reliability. A brimmed diffuser from Wind-lens technology is employed in this study. Experiments were carried out in the calculating water channel (CWC) for the bare turbine and the shrouded turbine, results of which proved that the diffuser was effective to improve the performance of the tidal turbine. The computational fluid dynamics (CFD) method and the blade element momentum (BEM) theory were used to evaluate the performance of the bare turbine and the shrouded turbine. For the tip speed ratio (TSR) around 3.0, calculation results from CFD and BEM fit experimental results well for the bare turbine. For the shrouded turbine, CFD results failed in capturing the experimental results but BEM results succeeded for the TSR greater than 3.0. In consideration of the actual running of turbines and calculation time cost, BEM is a satisfactory method for evaluating the performance of a turbine.