A study of counter-rotating impulse turbine for wave energy conversion - Effect of middle vane on the performance -
A study of counter-rotating impulse turbine for wave energy conversion - Effect of middle vane on the performance -
复制标题
波浪能转换对转冲击式水轮机的研究-中间叶片对性能的影响-
DOI：
10.1088/1755-1315/240/5/052001
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Y. Kinoue
中科院分区：
文献类型：
--
作者：
M. Takao;K. Yamada;R. Sasaki;M. Alam;S. Okuhara;Y. Kinoue
在振荡水柱（OWC）波能转换器中，由海浪运动引起的振荡水柱用于驱动气室中的气柱。用于该双向气流的空气涡轮机用于将气动能转换成机械能。M。E. 1978年的麦考密克。在之前的研究中，作者研究了涡轮机几何形状对反向旋转脉冲涡轮机性能的影响，并阐明了在高流量系数范围内，涡轮机的效率高于单转子脉冲涡轮机。然而，反向旋转冲击涡轮机具有缺点。在低流量系数范围内，由于两个转子之间的流动恶化，其效率显著降低。在这项研究中，中间叶片安装在两个转子之间，以实现进一步提高性能，其效果进行了研究，通过使用计算流体动力学（CFD）分析。结果发现，通过安装中间叶片，涡轮机的效率大大提高，并且阐明了有利的涡轮机几何形状。
In an oscillating water column (OWC) wave energy converter, the oscillating water column caused by the sea wave motion is used to drive an air column in the air chamber. An air turbine for this bi-directional airflow is used to convert the pneumatic energy into the mechanical energy. A counter-rotating impulse turbine for wave energy conversion has been proposed by M. E. McCormick in 1978. In a previous study, authors investigated the effect of turbine geometry on the performance of the counter-rotating impulse turbine and clarified that the efficiency of the turbine is higher than a single rotor impulse turbine in a range of high flow coefficients. However, the counter-rotating impulse turbine has a disadvantage. Its efficiency in a range of low flow coefficients is remarkably lower due to the deterioration of flows between two rotors. In this study, middle vanes were installed between two rotors in order to achieve a further improvement in the performance, and its effect was investigated by using the computation fluid dynamic (CFD) analysis. As a result, it was found that the efficiency of the turbine was greatly improved by installing the middle vanes, and a favourable turbine geometry was clarified.