摘要
为了提高风力机风能利用率,研发了一种可调叶片安装角的风力机轮毂,通过对基于Wilson法设计的叶片进行叶片安装角为-5°、0°、5°、10°时的车载测试,得到相应叶片安装角下300 W风力机输出功率特性曲线,并计算获得对应的风能利用系数及叶尖速比。根据研究结果发现:风速为6~10 m/s时,0°安装角下风轮整体性能高于其他3种安装角风轮;当风速小于6 m/s时,安装角适当增大有助于风轮启动;当风速大于10 m/s时,5°及10°安装角下风力机风能利用系数变化较小,而0°、-5°安装角下风力机风能利用系数均开始下降;随着安装角的变化,叶尖速比范围也有所不同。综上所述,对于风力机来说,安装角变化5°即对其气动性能影响较大,因此定桨距风力机叶片设计过程中应充分考虑所在环境风况,可通过试验方式选择合适的安装角,从而达到提高风力机风能利用率的作用,同时为变桨距风力机的变桨过程设计提供参考。
In order to improve the wind energy utilization rate of the wind turbine,a hub with adjustable blade installation angle was developed.Through the vehicle-mounted tests of the blades designed based on the Wilson method when the blade setting angles were-5°,0°,5°,and 10°,the output power characteristic curves of 300 W wind turbine with the corresponding blade installation angles were obtained,and the corresponding power coefficient and tip speed ratio were calculated.The results showed that when the wind speed was 6-10 m/s,the overall performance of the rotor at 0°installation angle was higher than that of the other installation angles.When the wind speed was less than 6 m/s,an appropriate increase in the setting angle was helpful for activating the rotor.When the wind speed exceeded 10 m/s,the power coefficient of wind turbine changed little at the installation angle of 5°and 10°,but decreased at 0°and-5°.With the change of setting angles,the range of tip speed ratio was also different.To sum up,a 5°change in the installation angle had a great impact on its aerodynamic performance for a wind turbine.Therefore,in the process of designing fixed-pitch wind turbine blades,the environmental wind conditions should be fully considered,and an appropriate setting angle could be selected through experiments or other methods to improve the wind energy utilization rate of the wind turbine.At the same time,it could provide references for the design of the pitch process of the partial pitch wind turbine blade.
作者
郭珊珊
韩巧丽
刘丹
王一博
吴成龙
杨敏
GUO Shanshan;HAN Qiaoli;LIU Dan;WANG Yibo;WU Chenglong;YANG Min(College of Mechanical and Electrical Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China;College of Energy and Transportation Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China)
出处
《内蒙古农业大学学报（自然科学版）》
CAS
2022年第4期57-61,共5页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
内蒙古自治区应用技术研究与开发项目(2020GG0314)
横向合作项目“低速启动叶片及测试系统”
关键词
风力机
安装角
叶尖速比
风能利用系数
Wind turbine
Setting angle
Tip speed ratio
Power coefficient
