DEVELOPMENT OF A FREE VORTEX WAKE METHOD CODE FOR OFFSHORE FLOATING WIND TURBINES
DEVELOPMENT OF A FREE VORTEX WAKE METHOD CODE FOR OFFSHORE FLOATING WIND TURBINES
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DOI：
10.1016/j.renene.2012.03.033
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发表时间：
2012-10
期刊：
影响因子：
8.7
通讯作者：
T. Sebastian;M. Lackner
中科院分区：
文献类型：
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作者：
T. Sebastian;M. Lackner
海上浮式风力涡轮机（OFWT）提出了独特的空气动力学分析挑战。尾流中由运动引起的速度扰动需要比目前普遍使用的动量平衡技术更高保真的空气动力学分析方法。一种物理上更合理的方法是将风力涡轮机转子产生的尾流建模为自由对流网格，使用合成流入来估计转子载荷，就像使用自由涡流尾流方法（FVM）一样。FVM代码尾流诱导动力学模拟器（WInDS）是由位于阿默斯特的马萨诸塞州大学开发的，用于预测OFWT的气动载荷和尾流演变，其精度高于动量平衡方法。针对目前尚无气动实验数据的漂浮式风力涡轮机，进行了一系列验证，为将WInDS应用于漂浮式风力涡轮机提供了依据。这些试验的结果表明，WInDS能够准确地预测各种固定翼和旋翼情况下产生的气动载荷和尾流结构，因此可以应用于更复杂的情况，如OFWT，具有一定的置信度。
Offshore floating wind turbines (OFWTs) present unique aerodynamic analysis challenges. Motion–derived velocity perturbations in the wake necessitate higher–fidelity aerodynamic analysis methods than the ubiquitous momentum balance techniques currently in use. A more physically–sound approach is to model the wake generated by a wind turbine rotor as a freely convecting lattice, using the resultant inflow to estimate rotor loads, as it done with a free vortex wake method (FVM). The FVM code Wake Induced Dynamics Simulator (WInDS) was developed at the University of Massachusetts at Amherst to predict the aerodynamic loading and wake evolution of an OFWT to a higher degree of accuracy than is possible via momentum balance methods. A series of validation cases were conducted to provide some basis for applying WInDS to floating wind turbine cases, for which no aerodynamic experimental data is currently available. The results from these tests show that WInDS is able to accurately predict the aerodynamically–derived loads and wake structures generated by various fixed and rotary–wing cases, and may therefore be applied to more complex cases, like OFWTs, with a degree of confidence.