中文摘要：

涡流发生器能够有效抑制风力机气流分离、延迟失速,转捩对其性能具有重要的影响。采用考虑了转捩效应的Gamma-Theta转捩模型,对安装有涡流发生器的DU91-W2-250叶片微段进行三维非定常计算,研究转捩对风力机涡流发生器气动性能的影响,和涡流发生器的转捩规律。结果表明：全湍流模型模拟的升力值偏低、阻力值偏高,升力系数最大误差达23.1%,升阻比最大误差达51.8%,Gamma-Theta转捩模型则能够更准确地模拟涡流发生器的气动性能,升力系数最大误差仅有7.9%;涡流发生器使叶片表面具有明显的三维转捩现象,其内部转捩效应更加明显,抑制气流分离效应更加有效;转捩使叶片分离区域变小,叶片失速延迟更加明显,分离得到有效控制。

英文摘要：

Vortex generators can restrain wind turbine flow separation and effectively delay stall, transition has an important impact on its performance. An unsteady numerical simulation using Gamma-Theta transition model has been made to investigate the influence of transition on wind turbine DU91-W2-250 and the transition rule with vortex generators. It is shown an inclusion that Full turbulence model undervalue the lift coefficient and overvalue the drag coefficient of wind turbine with vortex generators, the maximum relative error of lift coefficient is 23.1% and the maximum relative error of lift-drag ratio is 51.8%, the Gamma-Theta transition model can accurately simulate the performance of the wind turbine with vortex generator, the maximum relative error of lift coefficient is only 7.9%. Vortex generators make an obvious three-dimensional transition phenomenon on the surface of blade, the effect of the internal transition is more obvious and the effect of inhibiting flow separation is more effective. The area of separation with transition model is smaller in the same condition. Delay of the blade stall is also more obvious, the separation has been effectively controlled to have a great effect on the performance.