To take advantage of the high tidal current velocity near the free surface, the horizontal axis turbine is installed, which inevitably causes hydrodynamic characteristics to effect the turbine by the waves. In this article, we established a numerical calculation method for the hydrodynamic load of a horizontal axis turbine under wave-current conditions. Based on the numerical calculation results, the hydrodynamic loads were decomposed and the influence rules of wave parameters and blade tip immersion depth on the hydrodynamic load were obtained. The study found the following: 1) the multi-frequency fluctuations based on the rotation frequency and incident wave frequency occurred in instantaneous values of the axial load coefficients and energy utilization ratios, and the fluctuation amplitude decreased with the increase of the blade tip immersion depth; 2) the fluctuation amplitude, according to rotation frequency, changed less with the increase of wave period and wave height, and was smaller according to wave frequency; 3) the fluctuation amplitude based on wave frequency increased linearly with the increase of wave height and wave period. The research results can provide the basis and reference for the design and engineering application of tidal current power station.

中文翻译：

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波浪电流条件下水平轴潮流水轮机的水动力分析

为了利用自由表面附近的高潮流速度，安装了水平轴涡轮机，这不可避免地使流体动力学特性受到波浪的影响。在本文中，我们建立了一种在波浪电流条件下水平轴涡轮机水力负荷的数值计算方法。根据数值计算结果，对水动力载荷进行分解，得到波浪参数和叶片尖端浸入深度对水动力载荷的影响规律。研究发现：1）基于旋转频率和入射波频率的多频波动发生在轴向载荷系数和能量利用率的瞬时值中，随着叶尖浸没深度的增加，波动幅度减小。2）根据旋转频率的波动幅度，随着波周期和波高的增加而变化较小，而随波频率而变小；3）基于波频率的波动幅度随波高和波周期的增加而线性增加。研究成果可为潮流电站的设计和工程应用提供依据和参考。