风力机大厚度翼型增升减阻装置模拟研究

发布时间：2018-02-21 12:40

本文关键词： 风力机大厚度翼型增升减阻数值模拟涡发生器　出处：《太阳能学报》2015年10期 　论文类型：期刊论文

【摘要】：为了改善风力机专用大厚度翼型的气动性能,采用分离涡模拟(DES)方法对带有涡发生器(VGs)的40%大厚度翼型进行模拟研究,研究结果表明在一定攻角范围内涡发生器可有效推迟流动分离,提高翼型升力,降低阻力,涡发生器使翼型升力系数最大提高48%,阻力系数最多降低42%;采用同样计算方法对翼型吸力面加装涡发生器,压力面加装挡板的相对厚度为60%、80%的大厚度翼型进行模拟,研究结果表明在翼型吸力面涡发生器可推迟流动分离,在压力面挡板可提高压力面压力,涡发生器+挡板使60%大厚度翼型升力系数最多提高487%,阻力系数最多降低53%,80%大厚度翼型升力系数最多提高1100%,阻力系数最多降低38%。
[Abstract]:In order to improve the aerodynamic performance of large thickness airfoils for wind turbine, the separation vortex simulation (des) method is used to simulate 40% large thickness airfoils with VGs. The results show that the vortex generator can effectively delay flow separation, increase lift of airfoil and reduce resistance in a certain range of angles of attack. The vortex generator increases the lift coefficient of the airfoil by 48 and reduces the drag coefficient by 42. By using the same calculation method, the airfoil with a vortex generator installed on the suction surface and the airfoil with a relative thickness of 60 or 80% of the relative thickness of the baffle on the pressure surface is simulated, and the vortex generator is used to simulate the airfoil with a relatively thick airfoil with a relative thickness of 60% or 80%. The results show that the vortex generator can delay the separation of the flow in the airfoil suction surface, and the pressure on the pressure surface can be increased by the baffle on the pressure surface. The vortex generator baffle increases the lift coefficient of 60% airfoils with a maximum thickness of 487, decreases the drag coefficient by 53% and increases the lift coefficient of large thickness airfoils by 1 100%, and decreases the drag coefficient by 38% at most.
【作者单位】：华北电力大学电站设备状态监测与控制教育部重点实验室;西安现代控制技术研究所;
【基金】：国家自然科学基金(51176046) 中央高校基金(JB2015193)
【分类号】：TM315

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