摘要
在旋转的作用下,流动分离向下游延迟,结果大大改变了风力机叶片的气动特性,这种由旋转所带来的影响被称为三维旋转效应。本文以叶片表面边界层理论分析的结果为基础,给出了三维旋转效应对气流分离影响的解析关系,使得这一复杂问题可以方便地解决,为准确计算旋转叶片的气动载荷提供基础。通过算例表明,当这一三维旋转效应应用于叶片非定常气动特性计算时,能大大改善计算结果。
The flow separation is delayed under rotation action, its result changes the blade aerodynamic characteristics greatly compared to its non-rotating counterpart. This phenomenon caused by the rotation is called three-dimensional (3-D) rotational effect. Using the results of the 3-D integral boundary layer equations, this paper gives an analytical relationship between the 3-D rotational effect and the flow separation. It lays a foundation for accurately calculating the aerodynamic loads on rotating blades. Calculational results of unsteady loads on the wind turbine blade show that the calculation is improved by the 3-D rotational effect.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2005年第2期178-182,共5页
Journal of Nanjing University of Aeronautics & Astronautics
基金
航空科学基金 (0 2 A5 2 0 0 3 )资助项目。
关键词
三维旋转效应
流动分离
分离点延迟
边界层
非定常空气动力学
动态失速
three-dimensional rotational effect
flow separation
separation delay
boundary layer
unsteady aerodynamics
dynamic stall
