考虑动态失速和Gurney襟翼的风力机翼型气动建模  

Aerodynamic modeling of wind turbine airfoil concerning dynamic stall and Gurney flap

作　　者：杨俊伟 杨华 王相军 Junwei Yang;Hua Yang;Xiangjun Wang(Guangling College,Yangzhou University,Yangzhou 225000,China;College of Electrical.Energy and Power Engineering,Yangzhou University,Yangzhou 225127,China)

机构地区：[1]Guangling College,Yangzhou University,Yangzhou 225000,China [2]College of Electrical.Energy and Power Engineering,Yangzhou University,Yangzhou 225127,China

出　　处：《Acta Mechanica Sinica》2023年第9期66-81,共16页力学学报（英文版）

基　　金：supported by the Natural Science Foundation of Jiangsu Higher Education Institutions of China(Grant No.22KJD480003);the Curriculum Construction Project of Guangling College,Yangzhou University(Grant No.KCSZ202210).

摘　　要：Leishman-Beddoes模型(L-B模型)常被应用于动态失速时的非定常载荷预测.同时,加装气动附件的方法可以改善叶片周围的绕流状况,提高能量转换效率并减小载荷.然而,目前考虑此类气动附加件影响的动态失速半经验模型气动力预测的研究还较少.为此,本研究基于L-B模型进行扩展和修正,使其能够预测加装Gurney襟翼的风力机翼型的非定常气动特性.针对Gurney襟翼在俯仰振荡期间的非定常气动变化,即环量变化以及在翼型表面的涡的产生和脱落运动特性,提出了对应的预测模块.通过风洞实验的方式对预测结果进行了初步验证,表明所述方法具有较高的实用潜力,但气动系数试验结果在深失速区略有偏差.通过这种风力机优化技术,所得结果有助于更好地理解及评估不同瑞流来流工况时加装Gurney襟翼的风力机翼型动态特性变化规律.The prediction of the unsteady aerodynamic load on an airfoil has frequently used the Leishman-Beddoes(L-B)model.Meanwhile,flow control techniques could change the flow around the blade,increase the effectiveness of wind energy conversion,and reduce the wind load.However,there have been a limited number of investigations examining this semiempirical model taking into account the effects of such aerodynamic add-ons.As a result,this study intends to extend and modify the L-B model so that it can predict the unsteady aerodynamic characteristics of a wind turbine airfoil equipped with a Gurney flap.According to the unsteady aerodynamic changes of the Gurney flap during the oscillation period,the prediction module was proposed by the circulation changes,as well as characteristics of vortex generation and shedding traveling on the airfoil surface.These predicting results were preliminarily confirmed through a wind tunnel experiment,which illustrated that this approach has high practical potential.Nevertheless,the aerodynamic coefficients slightly deviated in the deep stall region.Adopting such a wind turbine optimization technology might improve the prediction and evaluation of the aerodynamic characteristics of a flapped airfoil under varying turbulent flow conditions.

关 键 词：风力机翼型 GURNEY襟翼 能量转换效率 动态失速 半经验模型 风洞实验 优化技术 气动系数 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]