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首页> 外文期刊>Renewable Power Generation, IET >Numerical investigation on the hydrodynamic performance of variable length blade tidal turbine: an attribute to enhance energy capture
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Numerical investigation on the hydrodynamic performance of variable length blade tidal turbine: an attribute to enhance energy capture

机译：变长叶片潮汐涡轮机水动力性能的数值研究：增强能量捕获的属性

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摘要

In the marine industry, it is important to improve the performance of tida turbines to reduce power generation costs. Modification of existing tidal turbine models is necessary to boost performance. The main objective of the present study is to investigate the hydrodynamic performance of a model variable length blade tidal turbine by modifying the baseline rotor to improve the performance using blade element momentum theory (BEMT). The QBlade BEMT simulation results were validated with the available published data and are in good agreement. Furthermore, the key performance parameters (i.e. thrust, moment, and power coefficient) and power output were predicted using the BEMT code for different blade configurations of the model rotor. The simulation results were compared with a standard conventional fixed blade turbine model. Based on the results from the simulations, with the increase in the rotor blade lengths, the performance parameters, particularly peak power coefficients, were observed to be improved up to 10%. The power extraction was also enhanced up to 79% below-rated tidal velocities without any loss in performance at the rated condition. Hence, the model is more efficient compared to the conventional models.
机译：在海洋工业中，提高tida涡轮机的性能以降低发电成本非常重要。必须对现有的潮汐涡轮机模型进行修改以提高性能。本研究的主要目的是通过使用叶片元动量理论（BEMT）修改基线转子以改善性能来研究模型可变长度叶片潮汐涡轮机的水动力性能。 QBlade BEMT模拟结果已通过可用的公开数据进行了验证，并且吻合良好。此外，使用BEMT代码针对模型转子的不同叶片配置预测了关键性能参数（即推力，力矩和功率系数）和功率输出。仿真结果与标准的常规固定叶片涡轮机模型进行了比较。基于仿真的结果，随着转子叶片长度的增加，观察到性能参数（尤其是峰值功率系数）提高了10％。在额定条件下，功率提取也可提高至低于额定潮汐速度达79％，而不会降低性能。因此，与常规模型相比，该模型效率更高。

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