摘要
风力机处于复杂的自然环境中,随着叶片尺寸和柔性不断变大,气动弹性问题日益突出。将基于时间步进自由尾迹的气动载荷模型与结构动力学模型进行耦合,计算了风力机在切变风速下的气弹响应特性。计算结果表明:切变风速下,考虑流固耦合的风轮叶尖变形量呈现周期性波动,且变形量随着风速的增大而增大。由于叶片变形的影响,风轮气动载荷会减小,且当风速高于额定风速时,叶片变形使得风轮载荷明显降低。研究结果对风力机的气动结构设计和控制策略的改进具有一定的参考价值。
Wind turbine works in complex natural environment,with the increase of blade size and flexibility,aeroelastic problems have become increasingly prominent.This article couples the aerodynamic load model and structure dynamics model to calculate the load of wind turbine.The results show that：the deformation of blade tip appears to have cyclical fluctuations under shear wind,and the amount of deformation increases with wind speed.Since the deformation of the blade,rotor aerodynamic loads will be reduced,and when the wind speed is higher than the rated wind speed,the blade deformation makes wind turbine load significantly reduced.Research results have some reference value for improving the aerodynamic design and control strategy of wind turbine.
出处
《机械工程与自动化》
2016年第5期40-41,44,共3页
Mechanical Engineering & Automation
基金
四川省泸州市科技计划项目(2014-S-50(7/7))
关键词
风力机
切变风速
流固耦合
气动载荷
wind turbine
wind shear
fluid-structure coupling
aerodynamic load
