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首页> 外文期刊>Journal of Fluids and Structures >A new direct design method for the medium thickness wind turbine airfoil
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A new direct design method for the medium thickness wind turbine airfoil

机译：一种直接设计中厚型风力发电机翼型的新方法

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摘要

The newly developed integral function of airfoil profiles based on Trajkovski conformal transform theory could be used to optimize the profiles for the thin thickness airfoil. However, it is hard to adjust the coefficients of the integral function for the medium thickness airfoil. B-spline curve has an advantage of local adjustment, which makes it to effectively control the airfoil profiles at the trailing edge. Therefore, a new direct design method for the medium thickness wind turbine airfoil based on airfoil integral expression and B-spline curve is presented in this paper. An optimal mathematical model of an airfoil is built. Two new airfoils with similar thickness, based on the new designed method and the original integral method, are designed. According to the comparative analysis, the CQU-A25 airfoil designed based on the new method exhibits better results than that of the CQU-I25 airfoil which is designed based on the original method. It is demonstrated that the new method is feasible to design wind turbine airfoils. Meanwhile, the comparison of the aerodynamic performance for the CQU-A25 airfoil and for the DU91-W2-250 airfoil is studied. Results show that the maximum lift coefficient and the maximum lift/drag ratio of the CQU-A25 airfoil are higher than the ones of DU91-W2-250 airfoil in the same condition. This new airfoil design method would make it possible to design other airfoils with different thicknesses.
机译：基于Trajkovski保形变换理论新开发的翼型轮廓积分函数可用于优化薄型翼型轮廓。但是，对于中等厚度的翼型，很难调整积分函数的系数。 B样条曲线具有局部调整的优势，这使得它可以有效地控制后缘的翼型轮廓。因此，本文提出了一种基于翼型积分表达式和B样条曲线的中厚型风力发电机翼型直接设计新方法。建立了机翼的最佳数学模型。基于新设计方法和原始积分方法，设计了两种厚度相似的新型机翼。根据比较分析，与基于原始方法设计的CQU-I25翼型相比，基于新方法设计的CQU-A25翼型具有更好的效果。实践证明，该方法对设计风机翼型是可行的。同时，研究了CQU-A25翼型和DU91-W2-250翼型的空气动力学性能的比较。结果表明，在相同条件下，CQU-A25翼型的最大升力系数和最大升阻比均高于DU91-W2-250翼型。这种新的机翼设计方法将使设计具有不同厚度的其他机翼成为可能。

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