翼型厚度对风力机翼型气动特性的影响  

Effects of Aerofoil Thickness on Airfoil Aerodynamic Characteristics

作　　者：李常[1] 梁武科[1] 金雪红[1] 王学涛[1] 

机构地区：[1]西安理工大学,陕西西安710048

出　　处：《流体机械》2010年第2期31-34,共4页Fluid Machinery

摘　　要：在Re=3×106下,基于k-w SST两方程湍流模型对两种不同厚度的NREL风力机专用翼型进行了数值模拟,重点研究了-5°～15°攻角下不同厚度对翼型气动特性的影响规律。非定常计算结果表明:不同厚度对翼型气动性能影响显著,在某一小攻角范围,较小厚度值可获得较大升阻比,在大攻角翼型发生失速时,较大厚度值可提高翼型的升阻比,拓宽高升阻比的攻角范围,有效改善翼型的分离流动特性。Based on the k-w SST turbulence model , two airfoils of different thickness are simulated at Re = 3 × 10^6, the aerody- namic characteristics of airfoil with different thicknesses at the attack angle of -5°- 15° are investigated. The unsteady numerical results show that ：the effect of the different aerofoil thickness is obvious to the aerodynamic performance , at a small angle of attack range , the greater thickness leads to the large lift-drag ratio , at large angle of attack ,larger thickness can improve the liftdrag ratio, broaden the scope of the angle of attack of the high lift-drag ratio , effectively improve the flow separation characteristics.

关 键 词：k-w SST湍流模型 翼型厚度 气动性能 非定常 分离流 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]