风力机叶片旋转平面内弯曲对动力学响应的影响  

Dynamic response of the wind turbine blade bending in the rotational plane

作　　者：李义金[1] 王同光[1] 钱耀如 

机构地区：[1]南京航空航天大学江苏省风力机设计高技术研究重点实验室,江苏南京210016

出　　处：《空气动力学学报》2017年第5期659-664,共6页Acta Aerodynamica Sinica

基　　金：国家973计划项目(2014CB046200);国家自然科学基金(11172135);江苏省自然科学基金重点项目(BK20140059);江苏高校优势学科建设工程资助项目

摘　　要：采用变分渐近梁截面分析方法(VABS)精确计算旋转平面内弯曲的复合材料叶片截面特性,耦合空间一维Euler-Bernoulli梁模型,分析了不同弯曲幅度对考虑弯扭耦合特性的风力机叶片动力学性能的影响。并采用非定常叶素动量理论,考虑动态入流和动态失速模型求解叶片的气动载荷,分析了叶片前掠和后掠在相同控制策略时各风速下对气动功率的影响,以及在极端阵风条件下的气动弹性响应情况。结果表明叶片弯曲对截面特性和前几阶的固有频率的影响较小,但在扭转方向具有较大影响。同时在相同控制策略下,叶片后掠会使风力机的功率降低,但能有效降低极端阵风下的载荷波动。The variational asymptotic beam section analysis method （V A B S ） was used to calculate the sectional properties of composite blades bending in rotational plane. On the basis of the Euler-Bernoulli beam model, the influence of bending amplitude was analyzed on the dynamic characteristics of the blades. The unsteady blade element momentum theory inconsideration ofdynamic f low and dynamic stall model was used to calculate the aerodynamic loads. The gas power at various wind speeds was calculated fo r forward and backward swept blades w ith samecontrol strategy, and corresponding analysis was also carried out regarding the aeroelastic response in the extreme wind conditions. Results show that, the influence of bending effect is weak on the sectional properties and the first several orders of the natural frequency, whiie theinfluence on the torsional direction is significant. I t is also shown that for the same control strategy, the backward swept blade leads to the reduction in the gas power, and of the load fluctuation encountering extreme gust.

关 键 词：VABS 风力机 非定常叶素动量理论 面内弯曲 气弹响应 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]