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A robust engineering approach for wind turbine blade profile aeroelastic computation

机译：风力涡轮机叶片轮廓气动弹性计算的可靠工程方法

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摘要

Wind turbines are important devices that extract clean energy from wind flow. The efficiency of wind turbines should be examined under various working conditions in order to estimate off-design performance. Numerous aerodynamic and structural research works have been carried out to compute aeroelastic effects on wind turbines. Most of them suffer from either the simplicity of the modelling approach or from the difficulty of the computing technique, which limits the practical applicability of the results. In this research, a robust approach is proposed to compute the aeroelastic behaviour of a horizontal axis wind turbine blade profile for conceptual design purposes. The simplicity and applicability of the approach are the significant points of the research work. Aerodynamic and elastic computations made using XFOIL and MATLAB PDE toolbox. Those tools are linked through an algorithm to interactively compute aeroelastic effects. A real measured time history of wind velocity is used as an input flow condition to simulate a real angle of attack for aeroelastic computation. Investigation of numerical output shows lift and drag coefficient values are lower compared to the corresponding values of the rigid profile. The study of modulus of elasticity value on the separation point location is also conducted, and the delayed stall is observed by decreasing the airfoil rigidity.
机译：风力涡轮机是从风流中提取清洁能源的重要设备。为了评估非设计性能，应在各种工作条件下检查风力涡轮机的效率。已经进行了许多空气动力学和结构研究工作，以计算对风力涡轮机的空气弹性效应。它们中的大多数都遭受建模方法的简单性或计算技术的困难的困扰，这限制了结果的实际适用性。在这项研究中，为概念设计目的，提出了一种鲁棒的方法来计算水平轴风力涡轮机叶片轮廓的气动弹性行为。该方法的简单性和适用性是研究工作的重点。使用XFOIL和MATLAB PDE工具箱进行的空气动力学和弹性计算。这些工具通过算法链接在一起，以交互方式计算气动弹性效应。实际测得的风速时间历史用作输入流动条件，以模拟实际迎角进行气动弹性计算。对数值输出的研究表明，升力和阻力系数值比刚性轮廓的相应值低。还对分离点位置上的弹性模量值进行了研究，并通过降低翼型刚度观察了延迟失速。

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