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唐新姿, 李可翔, 何文双, 胡聪芳, 彭锐涛. 湍流风况顺桨风力机叶片气动阻尼特性研究. 力学学报, 2024, 56(4): 1-11. DOI: 10.6052/0459-1879-23-452
引用本文: 唐新姿, 李可翔, 何文双, 胡聪芳, 彭锐涛. 湍流风况顺桨风力机叶片气动阻尼特性研究. 力学学报, 2024, 56(4): 1-11. DOI: 10.6052/0459-1879-23-452
Tang Xinzi, Li Kexiang, He Wenshuang, Hu Congfang, Peng Ruitao. Aerodynamic damping characteristics of feathered wind turbine blades under turbulent wind conditions. Chinese Journal of Theoretical and Applied Mechanics, 2024, 56(4): 1-11. DOI: 10.6052/0459-1879-23-452
Citation: Tang Xinzi, Li Kexiang, He Wenshuang, Hu Congfang, Peng Ruitao. Aerodynamic damping characteristics of feathered wind turbine blades under turbulent wind conditions. Chinese Journal of Theoretical and Applied Mechanics, 2024, 56(4): 1-11. DOI: 10.6052/0459-1879-23-452

湍流风况顺桨风力机叶片气动阻尼特性研究

AERODYNAMIC DAMPING CHARACTERISTICS OF FEATHERED WIND TURBINE BLADES UNDER TURBULENT WIND CONDITIONS

  • 摘要: 当前风电技术大型化发展, 叶片气弹失稳问题特别是特殊工况下的稳定性问题成为国内外各界关注的热点和难点. 湍流风况下顺桨风电叶片气弹稳定性直接影响风电机组的安全可靠性. 气动阻尼是叶片稳定性判断的重要指标. 为探究湍流风况顺桨风电叶片气弹失稳特性规律, 以NERL 5 MW风力机叶片为研究对象, 基于修正叶素动量理论、欧拉−伯努利梁模型和气动阻尼计算方法, 建立顺桨叶片气动阻尼计算模型, 采用Kaimal湍流风模型进行瞬态分析, 获得风况参数对风力机叶片气动稳定性的影响规律及叶片的气动失稳概率, 为大型风力机叶片气弹稳定性设计与控制提供参考. 结果表明: 顺桨叶片气动阻尼在全周风向上呈180°周期特性, 且25°风向为相对危险工况; 风速越大气动阻尼负值越显著, 气动不稳定风向范围越大, 失稳概率越大; 湍流强度增加, 一阶挥舞气动阻尼下限降低幅度明显, 气动不稳概率增加; 湍流风况下顺桨叶片平面外方向的失稳概率较平面内方向更大, 且两个方向失稳概率曲线呈相似周期性规律.

     

    Abstract: At present, with the large-scale development of wind power technology, the aerodynamic instability of blades especially the stability under special working conditions has become a hot and difficult problem at home and abroad. The aerodynamic stability of feathering wind turbine blades directly affects the safety and reliability of wind turbines under turbulent wind conditions. Aerodynamic damping is an important index of blade stability judgment. In order to investigate the aerodynamic instability characteristics of the blades of feathered wind turbines under turbulent wind conditions, the aerodynamic damping calculation model of the blades of NERL 5 MW wind turbines was established based on the modified blade element momentum theory, Euler-Bernoulli beam model and aerodynamic damping calculation method, and the Kaimal turbulent wind model was adopted for transient analysis. The influence of wind parameters on aerodynamic stability of wind turbine blades and the probability of aerodynamic instability of wind turbine blades are obtained, which provides a reference for aerodynamic stability design and control of large wind turbine blades. The results show that the aerodynamic damping of the feathering blade presents a period of 180° over the whole wind direction, and the wind direction of 25° is relatively dangerous. The greater the wind speed, the more significant the negative aerodynamic damping value, the larger the range of aerodynamic unstable wind direction, and the greater the instability probability. With the increase of turbulence intensity, the lower limit of first order flapping aerodynamic damping decreases obviously, and the probability of aerodynamic instability increases. In turbulent wind conditions, the instability probability of feathering blades outside the plane direction is greater than that in the plane direction, and the instability probability curves of the two directions show similar periodic rules.

     

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