风力机翼型表面凸台的粗糙度效应研究  

Research on roughness effect of wind turbine airfoil surface boss

作　　者：耿海超 余海洋 罗大海 Geng Haichao;Yu Haiyang;Luo Dahai(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《可再生能源》2021年第8期1051-1056,共6页Renewable Energy Resources

基　　金：国家自然科学基金资助项目(51606127)。

摘　　要：文章选取风力机常用翼型DU91-W2-250和NACA63-425为研究对象,通过γ-Reθt转捩模型对光滑翼型和粗糙翼型进行了二维定常模拟。用矩形凸台代替实际锯齿形粗糙带验证了模拟翼型表面粗糙度效应的可行性。通过升、阻力系数的比较和流场显示,探讨了粗糙度影响翼型气动性能的内在机理。数值模拟结果表明:矩形凸台可以有效地模拟翼型表面的粗糙度效应,在翼型吸力面5%弦长位置,翼型气动性能随前缘凸台高度的增加而恶化;随着凸台位置向尾缘移动,DU91-W2-250翼型的气动性能逐渐接近原始翼型,NACA63-425翼型的气动性能呈现出先恶化后改善的趋势。The article selects the commonly used wind turbine airfoils DU91-W2-250 and NACA63-425 for the study, and conducts two-dimensional constant simulations of smooth and rough airfoils by the γ-Reθtturning model. The feasibility of simulating the surface roughness effect of the airfoil was verified by replacing the actual serrated rough belt with convex platform. The comparison of lift and drag coefficients and the flow field are shown to explore the intrinsic mechanism of roughness affecting the aerodynamic performance of the airfoil. The numerical simulation results show that the rectangular convex platform can effectively simulate the roughness effect on the airfoil surface, and the airfoil aerodynamic performance deteriorates with the increase of the convex platform height at the leading edge at the position of 5% chord length of the airfoil suction surface;As the convex platform position moves toward the trailing edge, the aerodynamic performance of DU91-W2-250 airfoil gradually approaches the original airfoil, and the aerodynamic performance of the NACA63-425 airfoil shows a trend of first deterioration and then improvement.

关 键 词：风力机 翼型 粗糙度 气动性能 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]