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翼型参数化是翼型优化中的重要组成部分。以最常用的Hicks-Henne型函数法为基础,分析了此型函数对翼型后缘描述不精确的原因,并提出了改进方法。由于Hicks-Henne型函数在使用中需确定型函数峰值位置,即站位点和型函数的幅值大小,利用站位点生成函数,结合改变型函数幅值的思想,通过优化算法来自动调节站位点分布和型函数幅值,提高了翼型描述精度。算例分析表明,该改进方法能够大幅度提高Hicks-Henne型函数法对翼型的描述精度,具有一定的工程实用价值。
Airfoil parameterization is an important part of airfoil optimization. Based on the most commonly used Hicks-Henne type function method, the reason why this type of function describes the inaccuracy of the trailing edge of the airfoil is analyzed and an improved method is proposed. Since the Hicks-Henne type function needs to determine the peak position of the typed function, that is, the magnitude of the station type and the type function in use, the station-point generation function is used in combination with the idea of changing the magnitude of the function, and the optimization algorithm is used to automatically adjust Station site distribution and type function amplitude, improve the airfoil description accuracy. The case study shows that this improved method can greatly improve the description accuracy of Hicks-Henne function method for airfoils, and has certain engineering practical value.