该研究采用自由尾迹涡方法与几何精确梁理论相结合的数值框架,对风力机在艏摇运动条件下的气弹耦合响应进行分析,重点讨论浮台艏摇运动与叶片结构变形之间的耦合效应及其对整机气动性能的影响机制。结果显示,浮式平台的艏摇运动会引起叶片法向入流速度的周期性扰动,影响风力机性能;在艏摇工况下,风轮的平均输出功率较固定工况显著上升,而叶片的柔性形变则会降低风轮载荷;浮台艏摇运动会导致风轮平面处载荷的不均匀分布,并造成俯仰力矩和偏航力矩的波动;艏摇工况下,叶片形变会受到自身重力及浮台运动的联合影响,叶片挥舞响应会削弱法向来流分量,扭转响应则降低气动攻角,从而改变升力产生条件,最终表现为风力机整体气动载荷的减小。
Abstract
In this paper, based on the free vortex wake model and the geometrically exact beam model, the aeroelastic characteristics of wind turbines under yaw conditions are studied, and the combined effects of platform yaw motion and blade deformation on wind turbine performance are discussed. The results show that the yaw motion of the floating platform may cause the fluctuation in blade normal inflow, which affects wind turbine performance. Under yaw condition, the average output power of the rotor is significantly higher than that under the fixed condition, while the flexible deformation of the blade will reduce the load of the rotor. The yaw motion of the floating platform causes the uneven distribution of the load on the rotor plane and the fluctuation of the pitch and yaw moments. Under yaw conditions, blade deformation is affected by the combined effects of gravity and floating platform motion. Blade flapwise deformation will reduce the normal inflow velocity of the blade, while torsional deformation will reduce the blade angle of attack, resulting in the decrease of wind turbine load.
关键词
浮式风力机 /
气动特性 /
柔性形变 /
艏摇运动
Key words
offshore floating wind turbines /
aerodynamics /
deflection /
yaw motion
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基金
中国长江三峡集团有限公司科研项目（202303058）; IV类高峰能源科学与技术学科项目
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