基于伴随方法的低风速风电机组翼型优化研究

OPTIMIZATION RESEARCH ON LOW WIND SPEED WIND TURBINE AIRFOIL BASED ON ADJOINT METHOD

以提高翼型的升阻比为优化目标,基于CFD(computational fluid dynamics)数值模拟,利用基于控制理论的伴随(Adjoint)方法及网格快速变形理论,在低风速条件下,分别对水平轴风电机组叶片通常使用的传统航空翼型NACA0012和风电机组专有翼型S8036进行仿真优化研究。结果表明:结合基于控制理论的伴随算法及网格快速变形方法,可有效改进优化2种不同类型翼型的气动性能。在相同的流场条件下,优化得到的翼型分别与初始翼型NACA0012和S8036相比,升阻比分别提高8.75%和16.74%。

To improve the airfoil lift to drag ratio,the simulation and optimization research has been performed on the traditional aviation airfoil NACA0012 and the wind turbine airfoil S8036,respectively.Under the condition of low wind speed,always used in horizontal axis wind turbines,with the adjoint(based on the control theory)and the fast mesh deformation methods,based on the CFD(Computational Fluid Dynamics)numerical simulation.The results showed that two kinds of airfoils’aerodynamic characteristics could be improved effectively,combining the adjoint(based on the control theory)and the fast mesh deformation methods.Compared with the initial airfoils NACA0012 and S8036,lift-todrag ratios of optimized airfoils were improved by 8.75%and 16.74%,respectively under the same fluid conditions.