Experimental verifications of numerical predictions for the hydrodynamic performance of horizontal axis marine current turbines
Experimental verifications of numerical predictions for the hydrodynamic performance of horizontal axis marine current turbines
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DOI：
10.1016/j.renene.2007.10.001
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发表时间：
2007-12
期刊：
影响因子：
8.7
通讯作者：
A. Bahaj;W. Batten;G. McCann
中科院分区：
文献类型：
--
作者：
A. Bahaj;W. Batten;G. McCann
海洋或海流的动能转换提供了一个令人兴奋的命题，因为它可以提供规律和可预测的能源。大多数建议的设计转换这种类型的动能是基于水平轴涡轮机的概念，它具有共同的特点，那些正在使用的风能。尽管可以从风力涡轮机技术中学习和转移很多东西，但它们之间存在显著差异。这包括自由表面的影响和空化的发生。因此，任何已开发的数值方法都需要验证。本研究报告了基于叶片单元动量理论的仿真工具的开发和验证——一个商业代码（GH-Tidal Bladed）和一个学术内部代码（SERG-Tidal）。通过在空化隧道和拖曳槽中对直径为800mm的涡轮模型进行的实验测量得出了验证。实验数据包括在一系列桨距设置和转速下涡轮产生的轴功率和推力的测量。比较了两种规范的计算结果。这表明，两种程序的计算结果具有相似的趋势，并能很好地反映涡轮的试验性能。这样的结果给了必要的信心，对开发的代码产生了适当的工具，可以由海流涡轮机的开发商利用。
The conversion of the kinetic energy presented by ocean or marine currents offers an exciting proposition as it can provide regular and predictable energy resource. The majority of the proposed designs for converting this type of kinetic energy are based on the concept of the horizontal axis turbines, which has common characteristics to those being used in wind energy. Although a lot can be learnt and transferred from wind turbine technology, there are significant differences. These include the effects of the free surface and the occurrence of cavitation. Consequently, any developed numerical methods need to be verified. This study reports on the development and verification of simulation tools based on blade element momentum theory—a commercial code (GH-Tidal Bladed) and an academic in-house code (SERG-Tidal). Validation is derived from experimental measurements conducted on a model 800mm diameter turbine in a cavitation tunnel and a towing tank. The experimental data includes measurements of shaft power and thrust generated by the turbine for a series of blade pitch settings and speeds. The results derived from the two codes are compared. These indicate that the two developed codes demonstrate similar trends in the results and provide a satisfactory representation of the experimental turbine performance. Such results give the necessary confidence in the developed codes resulting in appropriate tools that can to be utilised by developers of marine current turbines.