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Numerical analysis of the hydrodynamic performance and wake field of a horizontal axis tidal current turbine using an actuator surface model

机译：基于执行器表面模型的水平轴潮流涡轮水动力性能和尾流场的数值分析

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摘要

An actuator surface model was used to numerically simulate a tidal turbine, reducing the required number of model grid cells and improving the accuracy of the tidal current turbine wake flow field. In addition, detailed distributions of the body force along the hydrofoil chords were included in the actuator surface model. Next, the hydrodynamic performance and the characteristics of the near and far wake profiles that were predicted using the improved model were compared with the reference models and experimental data, and a good correlation was observed. In this research, the point at which the wake split into the near and the far wake field was between 1/2 and 1 times the diameter of the turbine downstream of the rotor. The axis structure of a tidal current turbine and the gap between the axis and the root of a blade strongly influence the wake profile. In a near wake, the velocity fluctuant shows a greater range of influence along the span-wise direction of the blade. In addition, numerical simulations of the field around blade showed that when the distance to the airfoil was greater than approximately one chord length, the streamlines and pressure contours obtained from the actuator surface model were in good agreement with the streamlines and pressure contours obtained from the reference model.
机译：使用执行器表面模型对潮汐涡轮机进行数值模拟，减少了所需的模型网格单元数量，并提高了潮汐流涡轮机尾流场的精度。此外，执行机构表面模型中还包括沿水翼弦的车身力的详细分布。接下来，将使用改进模型预测的流体动力学性能和近，远尾流剖面的特征与参考模型和实验数据进行比较，并观察到良好的相关性。在这项研究中，尾流分裂成近场和远场的点是转子下游涡轮直径的1/2至1倍。潮流涡轮机的轴结构以及轴与叶片根部之间的间隙会强烈影响尾流轮廓。在接近尾声时，速度波动沿叶片的翼展方向显示出更大的影响范围。此外，叶片周围场的数值模拟表明，当距翼型的距离大于大约一个弦长时，从执行器表面模型获得的流线和压力轮廓与从叶片表面获得的流线和压力轮廓非常吻合。参考模型。

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  • 来源
    《Ocean Engineering》 |2015年第15期|1-9|共9页
  • 作者

    Guanghui Bai; Guojun Li; Yanghui Ye; Tieyu Gao;

  • 作者单位

    Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;

    Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;

    Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;

    Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Tidal current turbine; Wake field; Actuator surface model; Numerical simulation;

    机译：潮流涡轮机;唤醒场执行器表面模型;数值模拟;

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