流动控制组合对风力机翼型性能影响的实验研究

EXPERIMENTAL RESEARCH ON EFFECTS OF COMBINED FLOW CONTROL ACCESSORY OVER WIND TURBINE AIRFOIL AERODYNAMIC PERFORMANCE

为了研究基于涡发生器和Gurney襟翼流动控制组合的效果,对风力机专用翼型DU93-W-210进行风洞实验。实验工况包括光滑翼型、涡发生器、Gurney襟翼及不同组合方式。实验结果表明:Gurney襟翼与涡发生器组合不仅能获得更高的升力系数,而且能有效抑制流动分离,失速后阻力大幅降低。Gurney襟翼和涡发生器组合将2种装置的优势结合,得到更好的流动控制效果。双排涡发生器组合和单排涡发生器相比能更大程度延迟流动分离,进一步提高最大升力系数。

In order to study the effects of combined flow control methods based on vortex generators and Gurney flap,wind tunnel experiments were carried out for wind turbine dedicated airfoil DU93-W-210. The test matrix involved clean airfoil,Vortex Generators and Gurney flaps in different combinations. Results show that combined flow control approach using VGs and Gurney flap can not only obtain higher lift enhancement than each device individually but also effectively delays flow separation and reduces drag significantly after stall. The combined approach combines the advantages of both units and achieves better flow control effects than the individual one. Compared with one row VGs,proper two rows layout of VGs can further improve the airfoil aerodynamic performance,which delay flow separation more and cause the maximum lift higher.