叶片前缘磨损形貌特征对风力机翼型气动性能的影响

根据实际风电场中风力机叶片前缘磨损在不同阶段的形貌特征,通过对DU 96-W-180风力机翼型前缘进行改型,建立几何模型,结合SST k-ω湍流模型求解RANS方程,分析了翼型的升力、阻力及流场特性,研究了风力机翼型前缘磨损形貌特征对其气动性能的影响。结果表明,前缘磨损特征为砂眼和小坑时,对翼型的升、阻力系数影响较小;而前缘磨损特征为脱层时,对翼型的升阻特性影响显著,尤其随着攻角增加,升力系数大幅减小,阻力系数急剧增大,并且随着磨损的加剧,减小和增加的幅度逐渐增大。前缘磨损加剧了翼型吸力面尾缘附近的流动分离,使分离点前移;砂眼和小坑对气流在翼型前缘的流动影响较小;脱层对翼型前缘附近流动影响很大...

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Bibliographic Details
Published in农业工程学报 Vol. 33; no. 22; pp. 269 - 275
Main Author 李德顺 王成泽 李银然 李仁年 赵振希 陈霞
Format Journal Article
LanguageChinese
Published 甘肃省风力机工程技术研究中心,兰州 730050 2017
湘电风能有限公司,湘潭 411101%兰州理工大学能源与动力工程学院,兰州,730050
兰州理工大学能源与动力工程学院,兰州 730050
甘肃省流体机械及系统重点实验室,兰州 730050%兰州理工大学能源与动力工程学院,兰州 730050
Subjects
前缘磨损特征
数值模拟
气动性能
磨损
翼型
风力机
风能
翼型
风力机
leading edge erosion feature
气动性能
airfoil
wind energy
前缘磨损特征
磨损
erosion
wind turbines
aerodynamic characteristics
风能
数值模拟
numerical simulation
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ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2017.22.035

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Summary:根据实际风电场中风力机叶片前缘磨损在不同阶段的形貌特征,通过对DU 96-W-180风力机翼型前缘进行改型,建立几何模型,结合SST k-ω湍流模型求解RANS方程,分析了翼型的升力、阻力及流场特性,研究了风力机翼型前缘磨损形貌特征对其气动性能的影响。结果表明,前缘磨损特征为砂眼和小坑时,对翼型的升、阻力系数影响较小;而前缘磨损特征为脱层时,对翼型的升阻特性影响显著,尤其随着攻角增加,升力系数大幅减小,阻力系数急剧增大,并且随着磨损的加剧,减小和增加的幅度逐渐增大。前缘磨损加剧了翼型吸力面尾缘附近的流动分离,使分离点前移;砂眼和小坑对气流在翼型前缘的流动影响较小;脱层对翼型前缘附近流动影响很大,导致翼型表面出现台阶流,气流绕过台阶先发生分离,然后再次附着翼型表面流动。
Bibliography:11-2047/S
Li Deshun1,2,3, Wang Chengze1,4, Li Yinran1,2,3, Li Rennian1,2,3, Zhao Zhenxi1, Chen Xia1 （1. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2. Gansu Provincial Technology Centre for Wind Turbines, Lanzhou 730050, China; 3. Key Laboratory of Fluid Machinery and Systems, Lanzhou 730050, China; 4. XEMC Windpower Co. Ltd. Xiangtan 411101, China）
Because wind turbine blades are exposed to complex natural environment for a long time, as time goes on, rain, snow, dust and other particles will gradually erode the surface of blade, then causing the erosion on the blade surface, especially at the leading edge of the blades, which is the area with the most serious wear. With wind turbine running time increasing, under the impact of various complex particles, the erosion process on wind turbine blades typically starts with the formation of small pits at the leading edge, which quickly develop into gouges with larger size and deeper depth, and then the increasing
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2017.22.035