The effect of surface waves on the performance characteristics of a model tidal turbine
The effect of surface waves on the performance characteristics of a model tidal turbine
复制标题
DOI：
10.1016/j.renene.2013.02.022
复制
发表时间：
2011-12
期刊：
影响因子：
8.7
通讯作者：
L. Luznik;K. Flack;E. Lust;Katharin C. Taylor
中科院分区：
文献类型：
--
作者：
L. Luznik;K. Flack;E. Lust;Katharin C. Taylor
在美国海军学院的一个大型拖曳水箱设施中，对一个三叶片水平轴潮汐涡轮机进行了比例模型试验。给出了在有表面波和无表面波两种情况下，以恒定航速牵引的水轮机的性能特性。模拟的中间波代表了美国东海岸大陆架上典型的涌浪。水柱中存在的振荡波速导致测量的涡轮转矩和转速作为波相的函数发生显著变化。这反过来又产生了叶尖速比和功率系数的循环变化。在整个波相上的功率系数与没有波的实验在一定的叶尖速比范围内没有差异，正如以前的研究所报道的那样。波浪限制了涡轮可以运行的叶尖速比的较低范围。这些结果突出了表面波对涡轮设计和性能的影响，以及了解特定场地波浪条件的重要性。
Scale model tests were conducted on a three bladed horizontal axis tidal turbine in a large tow tank facility at the United States Naval Academy. Performance characteristics are presented for a turbine towed at a constant carriage speed for cases with and without surface waves. Intermediate waves were modeled that are representative of swells typically found on the continental shelf of the United States eastern seaboard. The oscillatory wave velocity present in the water column results in significant variations in measured turbine torque and rotational speed as a function of wave phase. This in turn produces cyclic variations in tip speed ratio and power coefficient. The power coefficient over the entire wave phase did not show a difference from the experiments without waves for a range of tip speed ratios, as reported in previous studies. The waves limited the lower range of tip speed ratios at which the turbine could operate. These results highlight the impact of surface waves on turbine design and performance, and the importance of understanding the site-specific wave conditions.