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首页> 外文期刊>Journal of Energy Resources Technology >A Study on the Capability of Backward Swept Blades to Mitigate Loads of Wind Turbines in Shear Flow
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A Study on the Capability of Backward Swept Blades to Mitigate Loads of Wind Turbines in Shear Flow

机译：后掠叶片减轻剪切流中风力发电机负荷的能力研究

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摘要

The vertical wind shear is one of the major sources of fatigue loads on the blades of a horizontal axis wind turbine. Traditionally, the active individual pitch control system is used to alleviate the cyclic load fluctuations, which requires sensors and actuators. In this paper, a passive load control technique by using backward swept blades is explored of its potential capability of mitigating load variations in shear wind. An advanced aeroelastic model based on free wake vortex lattice model (FWVLM) and geometrically exact beam theory (GEBT) is developed for the study. Both the aerodynamic and structural solvers are able to account for the three-dimensional (3D) shape effects of the undeformed and deformed swept blades. The NREL 5-MW reference wind turbine is analyzed by adding backward sweep to the baseline blade. Comparisons are made between the baseline and swept blades for the time-varying root moments and rotor moments under sheared inflow. Different amounts of tip sweep are discussed. An effective reduction in the amplitude of the flapwise root moment variations is obtained, while the edgewise root moment is less influenced. Reduced mean values of the rotor yaw and tilt moments are also achieved, at the cost of increased blade root torsion moment.
机译：垂直风切变是水平轴风力涡轮机叶片上疲劳载荷的主要来源之一。传统上，主动式变桨控制系统用于缓解周期性负载波动，这需要传感器和执行器。本文研究了使用后掠叶片的被动负载控制技术，该技术可缓解剪切风中的负载变化。基于自由尾流涡流格子模型（FWVLM）和几何精确射束理论（GEBT）的高级气动弹性模型被开发出来用于研究。气动求解器和结构求解器都能够解决未变形和变形的后掠叶片的三维（3D）形状效应。通过向基线叶片添加后掠来分析NREL 5兆瓦参考风力涡轮机。比较基线和后掠叶片在剪切流入下随时间变化的根矩和转子矩。讨论了不同数量的尖端扫掠。有效地减小了拍打方根矩变化幅度，而边沿方根矩受到的影响较小。还以减小的叶片根部扭转力矩为代价实现了减小的转子偏航和倾斜力矩平均值。

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  • 来源
    《Journal of Energy Resources Technology》 |2019年第8期|081201.1-081201.11|共11页
  • 作者

    Chen Jinge; Shen Xin; Zhu Xiaocheng; Du Zhaohui;

  • 作者单位

    Shanghai Jiao Tong Univ, Sch Mech Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Mech Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Mech Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Mech Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    wind turbine; swept blade; load mitigation; aeroelastic coupling; shear wind;

    机译：风力涡轮机;后掠叶片;减轻负荷;气动弹性联轴器;剪切风;

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