摘要
文章以现有风力机变桨控制系统为研究对象,进行了变来流和环境温度的风轮性能试验,流固耦合计算选用workbench2021平台中的Fluent模块和Transient Structural模块来完成。结果表明:在试验范围内,模型和试验的功率、升力系数的最大误差分别为3.7%,5.8%,平均误差分别为2.2%,3.4%;在额定风速10 m/s位置风轮达到最大功率2.5 kW,攻角为14°时,升力系数最大为1.05。来流风速对尾流区旋涡强度影响较为明显,来流风速越高,同一位置坐标叶片表面压力越大,叶轮尾部速度衰减越小,叶片所受最大应力和变形量与来流风速成正比关系;环境温度越低,同一位置坐标叶片表面压力越大,叶片所受最大应力和变形量与环境温度成反比关系,环境温度为-20~20℃时,由温度引起的最大应力、变形量波动分别为1.45%和2.37%,该结果对风力机在恶劣环境中的运行具有指导意义。
Taking the existing wind turbine pitch control system as the research object,the impeller aerodynamic test with variable incoming flow and angle of attack was carried out,and the fluid-structure coupling calculation was completed by selecting the Fluent module and Transient Structural module in the workbench 2021 platform.The results show that:the maximum error of the power and lift coefficient of the model and test within the test range is 3.7%,5.8%,and the average error is 2.2%,3.4%,and the maximum power of the impeller in the rated wind speed of 10 m/s is 2.5 kW,and the lift coefficient of the angle of attack of 14°is the maximum of 1.05.The incoming wind speed has a more obvious effect on the strength of the vortex in the wake area,and the higher the incoming wind speed,the higher the surface pressure on the blades at the same position coordinates.The higher the incoming wind speed,the higher the surface pressure of the blade in the same position coordinate,the smaller the velocity attenuation of the impeller tail,and the maximum stress and deformation suffered by the blade is proportional to the incoming wind speed;the lower the ambient temperature,the higher the surface pressure of the blade in the same position coordinate,and the maximum stress and deformation suffered by the blade is inversely proportional to the ambient temperature,and the ambient temperature is in the range of-20~20℃,and the maximum stress and deformation caused by the temperature are 1.45%and 2.37%,the results of the study are of guiding significance for the operation of wind turbines in harsh environments.
作者
任小勇
李玉军
刘艳峰
Ren Xiaoyong;Li Yujun;Liu Yanfeng(Gansu Key Laboratory of Solar Power Generation System Project,Jiuquan Vocational and Technical College,Jiuquan 735000,China;School of New Energy,Lanzhou University of Technology,Jiuquan 735000,China)
出处
《可再生能源》
CAS
CSCD
北大核心
2024年第9期1198-1204,共7页
Renewable Energy Resources
基金
甘肃省教育厅高等学校创新基金项目(2022B-478)。
关键词
风力机
环境温度
振动
试验
流固耦合
wind turbines
ambient temperature
vibration
testing
fluid-solid coupling
作者简介
任小勇(1982-),男,硕士,副教授,主要从事风力发电机组设计研究工作。E-mail:327709146@qq.com。
