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在风力机翼型型线形状优化设计中,提出了一种新的基于Joukowski保角变换的通用翼型型线表征形式。建立了翼型多目标形状优化设计的数学模型,应用改进的多目标遗传优化算法,设计得到了4种性能优越的风力机专用翼型。详细分析了WT180翼型的空气动力学特性,该翼型在设计工况和非设计工况下都具有良好的气动性能,具有较低的前缘粗糙度敏感性。与目前风力机常用翼型相比,新翼型在主要工作攻角范围内,光滑和粗糙条件下的升力系数更高,升阻比更大,其气动性能相比传统翼型表现出明显的提高。
In wind turbine wing profile shape optimization design, a new general airfoil profile representation based on Joukowski Conformal Transformation is proposed. A mathematical model of airfoil multi-objective shape optimization design was established. Four kinds of airfoils for wind turbine with superior performance were designed with the improved multi-objective genetic algorithm. The aerodynamic characteristics of the WT180 airfoil are analyzed in detail. The airfoil has good aerodynamic performance under design conditions and non-designed conditions, and has low sensitivity to leading edge roughness. Compared with the common airfoils used in wind turbines, the new airfoils have higher lift coefficient and higher lift-drag ratio under the condition of main working angle of attack, and their aerodynamic performance is obviously lower than that of the conventional airfoil improve.