局部瞬态风况下风力机叶片载荷计算  

LOADS COMPUTATION OF WIND TURBINE BLADE IN LOCALTRANSIENT WINDS

作　　者：陈刚[1] 陈进[1] 庞晓平[1] Chen Gang;Chen Jin;Pang Xiaoping(State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044

出　　处：《太阳能学报》2020年第4期164-171,共8页Acta Energiae Solaris Sinica

基　　金：国家高技术研究发展(863)计划(2012AA051301);国家自然科学基金(51175526)。

摘　　要：对叶素动量理论(BEM)进行改进,动量理论的计算仍在风轮坐标系下进行,而叶素理论的计算在叶片的局部坐标系下进行。在局部坐标系下能更准确地利用二维翼型的特性来计算气动载荷,同时也能更好地调用Beddoes-Leishman(B-L)模型,从而全面考虑到风轮锥角、局部风况甚至叶片弯曲变形的影响。再将动量理论和叶素理论统一在风轮坐标系下完成迭代。采用B-L模型预测二维翼型的动态气动性能时应用切向力分离点计算分离流切向力,从而提高模型对动态气动阻力的预测精度。结合改进的BEM理论和动态效应模型对Tjaereborg 2 MW风力机进行仿真,所得叶根挥舞弯矩相比经典BEM更接近测试值。A improvement of blade element momentum(BEM)is presented.The momentum theory is applied in the rotor coordinate,while the blade element theory is applied in the local coordinate.The 2-D airfoil has more ascendant on aeroloads in the local coordinate.At the same time,it can better call the Beddoes Leishman(B-L)model,so as to consider comprehensively the impacts of the coning angle,the local winds,even the blade bending deformation.The B-L model is applied to predict the 2-D airfoils’aerodynamic performance when considering the unsteady of the winds.The B-L model is improved to predict the tangent force using the tangent separating point,which makes the predicting of the aero-drag force be more accuracy.The Tjaereborg-2 MW wind turbine is simulated combining the improved BEM theory and the B-L model,the calculated flap-bending moment calculated at blade root is closer to the measured data.

关 键 词：风力机 叶素动量理论改进 动态入流 叶片瞬态载荷 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]