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本文提出了一种计算在亚音速气流中作简谐振动的薄翼面上非定常气动载荷的简单方法。这种方法根据用集中力来代表翼面分布力的理论,把翼面分成若干个小面积元素,每个面积元素上的升力分布都用一个集中力来代表。由于这种计算方法不涉及积分运算,故易于计算一些复杂平面形状翼面的非定常气动载荷,甚至还可以用来解决带有部分展长操纵面的翼面问题。本文对几种不同平面几何形状的翼面进行了数值计算,并和相应的分析结果和实验结果进行了比较。
This paper presents a simple method to calculate unsteady aerodynamic loads on thin airfoils that are simply vibrated in subsonic airflow. This method divides the airfoil into several small-area elements based on the theory of concentration force representing the distribution of airfoil forces, and the distribution of lift on each element of area is represented by a concentration force. Because this method of calculation does not involve integral calculations, it is easy to calculate the unsteady aerodynamic loads on some complex planar airfoils and can even be used to solve airfoil problems with partially elongated control surfaces. In this paper, several kinds of airfoils with different planar geometries are numerically calculated and compared with the corresponding analysis results and experimental results.