Bidirectional Impulse Turbine With Spiral Flow Collector for Tidal Energy Conversion
Bidirectional Impulse Turbine With Spiral Flow Collector for Tidal Energy Conversion
复制标题
用于潮汐能转换的带有螺旋流收集器的双向脉冲涡轮机
DOI：
10.1115/1.4052176
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
S. Nagata and M. Takao
中科院分区：
文献类型：
--
作者：
M. Sakaguchi;Y. Kinoue;K. Hirayama;T. Murakami;N. Shiomi;Y. Imai;S. Nagata and M. Takao
为了开发利用海洋可再生能源，本文研究了一种由双向冲击式涡轮机和双向集流器组成的潮流能转换系统。其优点在于，当固定在海床上时，该涡轮机系统不需要根据规则潮汐取向的反转而进行取向改变的操作。通过循环水池和拖曳水池的试验研究表明，采用本研究提出的集流器可以提高涡轮机的输出功率。通过循环水槽试验和计算流体力学（CFD）分析，对螺旋叶片集流器进行了研究。实验结果表明，螺旋集流器的性能改善主要是由于涡轮机内轴向速度的增加，从而提高了涡轮机的输出功率。CFD分析结果表明，考虑到这种情况下涡轮机入口处的角力矩，固定螺旋叶片的倾斜角为180 °是合适的。
In order to make use of ocean renewable energy, a combination system of a bidirectional impulse turbine and a bidirectional flow collector for tidal current energy conversion is investigated in this paper. It is the advantage that this turbine system does not need an operation of orientation change according to the reversal of regular tidal orientation when fixed on the seabed. The experimental investigations by using both a circulating water tank and a towing tank showed that the turbine power output could be increased by adopting the flow collector proposed in this study. Then the flow collector with a fixed spiral vane named spiral flow collector was investigated by both a circulating water tank test and computational fluid dynamics (CFD) analysis. The experimental result of the spiral flow collector showed that the performance improvement was found on the increase of axial velocity in the turbine which contributed to the increase of the turbine power output. The results of CFD analysis showed that 180 deg of the skew angle of the fixed spiral vane was suitable in view of the angular moment at the turbine inlet in this case.