Aeroelastic simulation of multi-MW wind turbines using a free vortex model coupled to a geometrically exact beam model
Aeroelastic simulation of multi-MW wind turbines using a free vortex model coupled to a geometrically exact beam model
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DOI：
10.1088/1742-6596/753/8/082015
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发表时间：
2016-09
期刊：
影响因子：
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通讯作者：
J. Saverin;J. Peukert;D. Marten;G. Pechlivanoglou;C. Paschereit;D. Greenblatt
中科院分区：
文献类型：
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作者：
J. Saverin;J. Peukert;D. Marten;G. Pechlivanoglou;C. Paschereit;D. Greenblatt
本文研究大型柔性多兆瓦风力涡轮机叶片的气动弹性建模。大多数当前的性能预测工具利用叶片单元动量（BEM）模型，该模型基于仅在稳定条件下保持的许多简化假设。这就是为什么在这里使用升力线自由涡尾流（LLFVW）算法来精确求解非定常风力涡轮机空气动力学的原因。基于几何精确梁理论的结构分析工具BeamDyn的耦合允许对高度偏转的叶片进行时间分辨的气动弹性模拟，包括弯扭耦合。刚性和柔性叶片的叶片载荷和变形的预测分析参考不同的空气动力学和结构的方法。选择紧急停机程序作为导致大挠度的示例设计载荷情况，以强调结构耦合的影响，并证明高保真结构模型的必要性。
The current paper investigates the aeroelastic modelling of large, flexible multi- MW wind turbine blades. Most current performance prediction tools make use of the Blade Element Momentum (BEM) model, based upon a number of simplifying assumptions that hold only under steady conditions. This is why a lifting line free vortex wake (LLFVW) algorithm is used here to accurately resolve unsteady wind turbine aerodynamics. A coupling to the structural analysis tool BeamDyn, based on geometrically exact beam theory, allows for time-resolved aeroelastic simulations with highly deflected blades including bend-twist, coupling. Predictions of blade loading and deformation for rigid and flexible blades are analysed with reference to different aerodynamic and structural approaches. The emergency shutdown procedure is chosen as an examplary design load case causing large deflections to place emphasis on the influence of structural coupling and demonstrate the necessity of high fidelity structural models.