叶片振动对风轮尾迹流动的影响研究

Study on the Effect of Blade Vibration on the Wake of the Wind Turbine

本文以NACA4415叶片为模型,采用动网格技术为运行的风力机叶片施加一阶挥舞振型和一、二阶叠加挥舞振动,结合大涡数值模拟(LES)研究振动风轮的叶尖绕流、尾迹流场速度分布特点、尾迹涡的发展规律,为研究实际运行中叶片振动对风力机气动特性影响以及风机排布优化提供参考.

In this paper, the NACA4415 blade is used as a model. The first-order first flapping and one or two-order superimposed flapping vibration are applied to the wind turbine blades by the dynamic grid technology. The velocity distribution of the blade tip, the velocity distribution of the wake flow field, the development of wake vortex and the large eddy numerical simulation(LES) are studied. In order to study the effect of blade vibration on the aerodynamic characteristics of the wind turbine and the optimization of wind turbine arrangement in actual operation.