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Accuracy and consistency of CFD and engineering models for simulating vertical axis wind turbine loads

机译：模拟垂直轴风力涡轮机负载的CFD和工程模型的准确性和一致性

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摘要

The present work is intended to assess the ability of state-of-the-art approaches with various fidelity levels for accurate load predictions on vertical axis wind turbines (VAWT). The assessments are conducted by employing the Double-Multiple-Streamtube (DMS), Improved-DMS (IDMS), Unsteady Blade Element Momentum (UBEM), Vortex Model and fully resolved computational fluid dynamics (CFD) approaches. For the later case, three different codes are employed, namely FLOWer, TAU and Ansys Fluent. Three different turbines from low up to high rotor solidity (0.23, 0.53 and 1.325) are selected as the case studies. The prediction results are compared with experimental data at various operating ranges in terms of integral and azimuthal loads. The studies demonstrate that there is consistent agreement between engineering models at lightly loaded cases for the power curve prediction. The discrepancy at high tip speed ratio (X) is caused by wake expansion, unsteady and decambering effects. In contrast, CFD predictions hardly show consistent power prediction but deliver accurate thrust values.
机译：本作本作旨在评估最先进的方法对各种保真度水平的能力，以便在垂直轴风力涡轮机（VAWT）上准确负载预测。通过采用双多流动管（DMS），改进的-DMS（IDMS），不稳定的刀片元件动量（UBEM），涡流模型和完全解决的计算流体动力学（CFD）方法来进行评估。对于以后的情况，采用了三个不同的代码，即花，Tau和Ansys流利。选择从低于高转子固体的三种不同的涡轮机（0.23,0.53和1.325）作为案例研究。将预测结果与在整体和方位传载荷的各种操作范围内的实验数据进行比较。研究表明，电力曲线预测的轻型加载案例在工程模型之间存在一致的一致。高尖端速度比（X）处的差异是由唤醒膨胀，不稳定和污垢效果引起的。相比之下，CFD预测几乎没有显示一致的功率预测，但提供了准确的推力值。

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  • 来源
    《Energy》 |2020年第1期|118087.1-118087.24|共24页
  • 作者

    Galih Bangga; Amgad Dessoky; Zhenlong Wu; Krzysztof Rogowski; Martin O.L Hansen;

  • 作者单位

    Institute of Aerodynamics and Cas Dynamics (IAC). University of Stuttgart 70569 Germany;

    Institute of Aerodynamics and Cas Dynamics (IAC). University of Stuttgart 70569 Germany;

    Institute of Aerodynamics and Cas Dynamics (IAC). University of Stuttgart 70569 Germany School of Aeronautic Science and Engineering Beihang University Beijing 100191 China;

    Institute of Aeronautics and Applied Mechanics Warsaw University of Technology 00-665 Poland;

    Department of Wind Energy Technical University of Denmark DK2800 Denmark;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Aerodynamics; CFD; Energy; Momentum; VAWT;

    机译：空气动力学;CFD;活力;势头;vawt.;

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