偏航条件下覆冰风力机气动特性研究  

Study on Aerodynamic Performance of Ice Accreted Wind Turbine Under Yaw Condition

作　　者：王强 刘宇 李维浩 任靖豪 易贤 WANG Qiang;LIU Yu;LI Wei-Hao;REN Jing-Hao;YI Xian(Icing and Anti/de-icing Key Laboratory of CARDC,Mianyang 621000,China;State Key Laboratory of Aerodynamics,Mianyang 621000,China;China Aerodynamic Research and Development Center,Mianyang 621000,China)

机构地区：[1]结冰与防除冰重点试验室,绵阳621000 [2]空气动力学国家重点试验室,绵阳621000 [3]中国空气动力研究与发展中心,绵阳621000

出　　处：《工程热物理学报》2022年第4期918-928,共11页Journal of Engineering Thermophysics

基　　金：国家自然科学青年基金项目(No.51606213);四川省科技厅应用基础研究项目(No.19YYJC0402)。

摘　　要：寒冷气候条件下,风力机叶片结冰会显著改变风力机气动特性,严重影响风能资源高效开发。在偏航状态下,风力机结冰具有周期性动态相对入流特征,是风力机结冰研究面临的重要挑战。为揭示偏航覆冰风力机气动特性,构建了基于不同时间尺度的改进多时间步结冰计算模型,在利用NREL Phase VI风力机常规风洞试验数据及NACA0012翼型结冰风洞试验数据验证模型的基础上,计算获得了NREL Phase VI风力机不同偏航工况条件下叶片冰形特征,在此基础上详细分析了风力机的偏航覆冰气动特性。结果表明:偏航将使得覆冰翼型的升阻力特性恶化,导致风力机功率、推力及叶根弯矩降低;整体上,覆冰叶片的环量随着偏航角度的增加而降低,形成相对较低的叶片法向力及切向力分布。In cold climate, the accreted ice on wind turbine blade can significantly alter the aerodynamic performance of wind turbine, thus dramatically affecting the efficient development of wind energy resources. Under yaw condition, the relative inflow of wind turbine periodically changes,which poses a great challenge for wind turbine icing research. In order to shed light on the aerodynamic characteristics influenced by yaw icing, an Improved Multi-Shot Icing Computational Model(IMSICM) is proposed based on different time scales. The model is validated by the wind tunnel experimental results of NREL Phase VI wind turbine as well as the NACA0012 airfoil icing wind tunnel data. Then the ice shapes of NREL Phase VI wind turbine under different yaw conditions is calculated by the IMSICM and the corresponding aerodynamic characteristics are analyzed. The results show that: 1) the aerodynamic performance of local airfoil, such as the lift and drag coefficients, is further decreased under yaw icing condition, which leads to the reduction of the wind turbine power, thrust force as well as blade root moment;2) generally the circulation of wind turbine blade is reduced with the increase of yaw angle and the relative lower normal and tangential force distribution is formed under yaw influence.

关 键 词：风力机 偏航结冰 自由涡尾迹 Messinger模型 气动特性 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]