Numerical and experimental analysis of a counter-rotating type horizontal-axis tidal turbine
Numerical and experimental analysis of a counter-rotating type horizontal-axis tidal turbine
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DOI：
10.1007/s12206-016-0102-0
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发表时间：
2016-02
影响因子：
1.6
通讯作者：
Bin Huang;Y. Nakanishi;T. Kanemoto
中科院分区：
文献类型：
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作者：
Bin Huang;Y. Nakanishi;T. Kanemoto
为了利用潮流中的可再生能源，本文提出了一种独特的对旋式水平轴潮汐涡轮机。虽然对旋式水平轴风力机可以作为设计对旋式潮汐发电机的参考，但它具有自由面效应、空化现象等不同的特点。在室内风力机的基础上，初步设计了本文独有的潮汐风力机，并对其进行了CFD分析和实验测试，以评价其性能。对于存在严重分离和涡流的极端情况，计算流体力学预测的涡轮功率系数与实验数据的比较不是很好。然而，对于舒适的叶片螺距设置角和一定范围内的叶尖速度比，得到了很好的一致性，这为CFD分析的有效性提供了证据。这些结果充分证明了本文所建立的CFD模型适用于进一步的工作。
In order to exploit renewable energies form tidal currents, a unique counter-rotating type horizontal-axis tidal turbine was proposed in this paper. Although a counter-rotating type horizontal-axis wind turbine can be taken as a reference in designing the proposed counterrotating tidal turbine, there are some different characteristics such as the effects of the free surface and the occurrence of cavitation. The unique tidal turbine in this paper was preliminarily designed on the basis of the in-house wind turbine, and then CFD analysis and experimental test were carried out to evaluate its performance. For the extreme conditions where severe flow separation and vortex exist, the comparison of the power coefficients generated by the turbine between the CFD predictions and the experimental data shows not so good. However, good agreement has been obtained for the comfortable blade pitch setting angles and over a range of tip speed ratios, which provides an evidence of validation of CFD analysis. Such results give sufficient confidence that the CFD model set up here is suitable for the further works.