摘要
如何有效地提高风力机叶片叶型的气动性能是风力发电技术面临的重要问题。为验证在风力机叶片叶型上表面头部加入一定频率的振荡射流可以对叶型的气动特性产生有利的影响,对实际的风力机叶片叶型进行实验研究,得到叶片的表面压力分布并进行了分析。对NACA4418叶型,当弦长Re为6.0×105时,在上表面距离头部弦长7.8%的位置加入50～500Hz频率的振荡射流都可以有效的提高叶型的升力因数,对升力因数增加射流的大小和频率存在最佳值。这一特性为提高变工况下叶片的气动效率指出了一种有益的途径。
Wind tunnel experiments were used to study flow separation control from wind turbine blade surfaces by an oscillating jet to improve the wind turbine's airfoil efficiency. The oscillating jet with frequerscies of 50~500 Hz located at 7.8% chord increased the airfoil lift coefficient for a NACA4418 airfoil at chord Re=6.0×105. The experimental results show that the lift factor increases as the oscillating jet velocity increases. The maximum lift factor increases by 8% at an oscillating jet velocity of 20 m/s.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2002年第12期1663-1666,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家"九七三"重点基础研究专项经费资助(G1999022306)
