基于连续攻角的风力机翼型整体气动性能提高的优化设计

Wind Turbine Airfoil Optimal Design With High Whole Aerodynamic Performance Considering Continuous Angle of Attack

目前风力机翼型都是考虑单点设计攻角而开发出来,以追求局部气动性能的极大值,而忽略了连续设计攻角范围内翼型整体气动性能。结合翼型泛函集成理论及复杂型线表面曲率光滑连续性思想,提出连续攻角情况下风力机翼型廓线设计新方法,以解决翼型优化设计中其气动力难以收敛这一关键问题,并实现翼型整体气动性能的提高。将连续攻角情况下设计出来的WQ-B翼型与单点攻角情况下设计出来的WQ-A翼型进行了气动性能对比分析;并将WQ-B翼型系列应用到实际2 MW风力机叶片中。研究表明:相比WQ-A翼型及实际叶片,WQ-B新翼型系列及叶片整体性能均有显著提高。该研究不仅验证了该设计方法的可行性,而且也表明WQ-B翼型系列具有广泛的通用性及可置换性。

the current airfoil design methods are based on one point of design angle of attack, in order to seek the local maximum aerodynamic performance without considering the whole high aerodynamic performance within continuous design angle of attack. Based on airfoil functional integral and complicated profile curvature smooth continuity theory, a novel airfoil design method considering continuous angle of attack is presented. It not only can make the aerodynamic force convergence, but also make the whole aerodynamic performance increased. the aerodynamic comparison of the WQ-B airfoil series which are designed considering continuous angle of attack and the WQ-A airfoil series which are designed without considering continuous angle of attack is analyzed. Meanwhile, the WQ-B airfoil series are used to a real 2 MW wind turbine blade. The results are showed that, compared to the WQ-A airfoil and the actual blade, the WQ-B airfoil series and new blade exhibit better whole performance. This study verifies the feasibility for the novel design method. Moreover, it also indicates that the WQ-B airfoil series have broad generality and substitutability.