一种求解翼面类斜截面外形的简便方法

A Simple Method of Solving the Profile of the Oblique Section of Wing Surface

从飞机翼面外形设计的角度，利用顺气流截面弦长与任意斜截面弦长的相互关系，导出了一种求解翼面类斜截面外形的简便方法。本方法的优点是，可以方便地给出翼面类任意斜截面外形的相对坐标值。只要算出任意斜截面的弦长，就可以很快地得到对应外形的坐标值，而无需求解复杂的曲面方程。与传统的方法相比较，减少了计算量。这对于求解着于非顺气流方向的翼肋外形来说，尤其显得方便。文中以某型飞机机翼为例，分别用传统方法和简便方法进行计算，得到完全一致的结果。

From the angles of the disign of the profile of the wing surface of an aircraft, a simple method is derived for solving the profile of the oblique section of wing surface, using the interrelation between the length of chord of the section in the same direction as airflow and that of arbitrary oblique section in this paper. Its advantage is that the relative coordinate value may be Siven conveniently for the arbitrary oblique section of wing surface. The coordinate value of corresponding profile may be obtained quickly so long as the length of the chord of arbitrary oblique section is computed, without solving the complex equation of the surface. This method saves the computation time as compared with the traditional method. This method looks especially convenient for solving the profile of the wing rib in any direction different from the airflow. Taking the wing of a certain aircraft in this paper for example the computation is carried with this method and the traditional one repectively, giving that both results are exactly the same.