涡流发生器对风力机翼型气动特性的影响研究

Effect of Vortex Generators on Aerodynamic Characteristics of the Wind Turbine Airfoil

涡流发生器作为一种有效的流动控制方法之一,已被成功应用于改善风电叶片的气动特性,众多研究表明,涡流发生器的使用可以有效延迟气流分离,提高升阻比。为了深入了解加装涡流发生器的增升减阻特性,本文以NACA63-415翼型为研究对象,通过数值模拟方法研究分析了不同形状、不同弦向安装位置和多个攻角下涡流发生器对风力机叶片气动特性的影响,结果表明:在不同形状、不同安装位置及攻角下涡流发生器均可有效抑制风力机叶片边界层分离、提高升阻比,其中20%翼型弦向处安装的涡流发生器增升减阻效果最好。

As one of the effective flow control methods, vortex generators have been successfully applied to optimize the aerodynamic characteristics of wind turbine blades. Many studies have shown that the use of vortex generators can effectively delay the airflow separation and increase the lift-to-drag ratio. In order to gain insights into the characteristics of increasing the drag-reducing resistance of vortex generators, this paper took the NACA63-415 airfoil as the research object, studied and analyzed the impacts on the aerodynamic characteristics of wind turbine blades of vortex generators with different shapes, different chord-wise installation positions and multiple angles of attack through numerical simulation methods. The results show that the vortex generator can effectively restrain the separation of the boundary layer of the wind turbine blade and increase the lift-drag ratio under different shapes, installation positions and angles of attack. Among them, the vortex generator with 20% airfoil chord installed performed best in lift increasing and drag reduction.