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Effect of rotor–tower interaction, tilt angle, and yaw misalignment on the aeroelasticity of a large horizontal axis wind turbine with composite blades
Wind Energy ( IF 4.1 ) Pub Date : 2020-03-24 , DOI: 10.1002/we.2501
Gilberto Santo 1 , Mathijs Peeters 2 , Wim Van Paepegem 2 , Joris Degroote 1, 3
Affiliation  

This paper presents a detailed analysis of the rotor–tower interaction and the effects of the rotor's tilt angle and yaw misalignment on a large horizontal axis wind turbine. A high‐fidelity aeroelastic model is employed, coupling computational fluid dynamics (CFD) and structural mechanics (CSM). The wind velocity stratification induced by the atmospheric boundary layer (ABL) is modeled. On the CSM side, the complex composite structure of each blade is accurately modeled using shell elements. The rotor–tower interaction is analyzed by comparing results of a rotor‐only simulation and a full‐machine simulation, observing a sudden drop in loads, deformations, and power production of each blade, when passing in front of the tower. Subsequently, a tilt angle is introduced on the rotor, and its effect on blade displacements, loads, and performance is studied, representing a novelty with respect to the available literature. The tilt angle leads to a different contribution of gravity to the blade deformations, sensibly affecting the stresses in the composite material. Lastly, a yaw misalignment is introduced with respect to the incoming wind, and the resulting changes in the blade solicitations are analyzed. In particular, a reduction of the blade axial displacement amplitude during each revolution is observed.

中文翻译:

转子-塔架相互作用,倾斜角和偏航不对准对带有复合叶片的大型水平轴风力发电机的空气弹性的影响

本文详细分析了转子-塔架之间的相互作用以及转子的倾斜角和偏航角未对准对大型水平轴风力发电机的影响。采用高保真气动弹性模型,将计算流体动力学(CFD)和结构力学(CSM)耦合在一起。对大气边界层(ABL)引起的风速分层进行了建模。在CSM方面,每个叶片的复杂复合结构都使用壳单元精确建模。通过比较仅转子模拟和全机模拟的结果来分析转子-塔架相互作用,观察每个叶片在通过塔架前时负载,变形和功率产生的突然下降。随后,在转子上引入一个倾斜角,它对叶片位移,负载,并且对性能进行了研究,相对于现有文献而言是一种新颖。倾斜角导致重力对叶片变形的不同贡献,从而明显影响复合材料中的应力。最后,针对进来的风引入了偏航未对准,并分析了叶片拉力的最终变化。特别地,观察到每次旋转期间叶片轴向位移幅度的减小。
更新日期:2020-03-24
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