Numerical simulation of a marine current turbine in free surface flow
Numerical simulation of a marine current turbine in free surface flow
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DOI：
10.1016/j.renene.2013.09.042
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发表时间：
2014-03
期刊：
影响因子：
8.7
通讯作者：
X. Bai;E. Avital;A. Munjiza;John J. R. Williams
中科院分区：
文献类型：
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作者：
X. Bai;E. Avital;A. Munjiza;John J. R. Williams
由于其复杂的几何形状、流体-结构相互作用和不断变化的自由表面界面，自由表面下海流涡轮机功率性能的数值预测很难进行。本文采用浸入边界法，利用三维有限体积求解器将湍流流体流动与固体模拟耦合起来。提出了两种自由表面方法并针对不同条件进行了测试。然后分别通过各种研究验证了这些方法，并针对自由表面波下运行的海流涡轮机提出了耦合模拟。计算了不同转速下水平轴海流涡轮机（MCT）的功率系数，并与实验数据进行了比较。研究发现，该方法与已发表的结果基本一致，并为 MCT 和其他应用的更广泛研究提供了广阔的前景。
The numerical prediction of the power performance of a marine current turbine under a free surface is difficult to pursue due to its complex geometry, fluid–structural interactions and ever-changing free surface interface. In this paper, an immersed boundary method is used to couple the simulation of turbulent fluid flow with solid using a three-dimensional finite volume solver. Two free surface methods are proposed and tested for different conditions. The methods were then validated respectively by various studies and a coupled simulation was proposed for a marine current turbine operating under free surface waves. The power coefficients of a horizontal axis marine current turbine (MCT) with different rotating speeds are calculated and compared against the experimental data. It is found that the method is in general agreement with published results and provides a promising potential for more extensive study on the MCT and other applications.