北京航空航天大学学报 ›› 2014, Vol. 40 ›› Issue (3): 327-332.doi: 10.13700/j.bh.1001-5965.2013.0596

• 论文 • 上一篇    下一篇

基于大变形梁模型的风力机叶片气动弹性分析

张新榃, 杨超, 吴志刚   

  1. 北京航空航天大学 航空科学与工程学院, 北京 100191
  • 收稿日期:2013-10-22 出版日期:2014-03-20 发布日期:2014-03-29

Aeroelastic analysis method for wind turbine blade based on large deformation beam model

Zhang Xintan, Yang Chao, Wu Zhigang   

  1. School of Aeronautics Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2013-10-22 Online:2014-03-20 Published:2014-03-29

摘要: 以水平轴风力机为研究对象分析其叶片大幅值气动弹性动态响应问题.基于非线性欧拉梁模型和风力机叶片动态入流、动态失速气动力模型进行气动弹性建模.气弹方程的动态平衡求解采用Newton-Raphson迭代,分别通过牛顿下山法和同伦沿拓法这两种数值手段改善其迭代收敛性,并对这两种算法的有效性进行比较,结果表明同伦沿拓法的收敛性相对较好.以两种典型的水平轴风机为算例,在额定工作状态以及某些极端风况下计算叶片动态响应.根据叶片根部弯矩载荷幅值定义系统是否达到临界稳定状态,并针对关停状态的风机研究了叶片临界风速与来流方向角的关系.结果表明,某些极端风况和工作状态下,风机叶片根部弯曲载荷较大,相应临界稳定的风速较低.

Abstract: Large amplitude aeroelastic response problem of wind turbine blade was investigated. Nonlinear Euler beam model, dynamic inflow and dynamic stall model were adopted in aeroelastic modeling. Newton-Raphson iteration was used to solve the nonlinear aeroelastic equations. Newton-downhill method and homotopy continuation algorithm were used respectively to improve convergence, and the result shows that the homotopy continuation is more effective. Two typical wind turbines were analyzed in rated conditions and in extreme wind conditions. The system stability boundary was defined according to the amplitude of blade bending moment, and the relationship between the critical wind speed and azimuth angle of the inflow was researched. The results indicate that the wind turbine blades suffer excessive bending moment in some extreme wind conditions, and the aeroelastic stability boundary of the blade would be reached in some operation mode.

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