The invention relates to a method for determining a sweepback angle of a leading edge of an aircraft wing. Firstly, an aircraft coordinate system is stipulated, the X axis is stipulated to be the aircraft axial direction and point to the aircraft tail, the Y direction is the aircraft normal direction and point to the aircraft upper portion, and the Z direction is the aircraft spanwise direction and conforms to the right hand system; a wing leading edge discrete grid is read in, and the maximum length direction (generally the aircraft spanwise direction) of the wing leading edge is searched; secondly, approximately and equally dividing the wing leading edge grid into n sections along the maximum length direction, and searching the zero attack angle of the wing leading edge grid in each section and stationary point unit grid center coordinates (Xi, Yi and Zi) calibrated by zero sideslip incoming flow to obtain n grid center coordinates in total; and finally, performing linear fitting by adopting the obtained n lattice center coordinates to obtain a wing front edge characteristic line, and solving the sweepback angle of the wing front edge by adopting the straight line, the zero attack angle and the zero sideslip incoming flow. According to the method, the wing leading edge sweepback angle of any complex-shape discrete grid system can be effectively solved.

    本发明涉及一种飞行器翼前缘后掠角的确定方法。首先对飞行器坐标系进行规定,规定X轴为飞行器轴向,方向指向飞行器尾部,Y向为飞行器法向,方向指向飞行器上方,Z向为飞行器展向,符合右手系;读入翼前缘离散网格,搜索出翼前缘最大长度方向(一般为飞行器展向);其次,沿最大长度方向将翼前缘网格近似均分为n段,搜索每段中翼前缘网格的零攻角、零侧滑来流标定的驻点单元格心坐标(Xi,Yi,Zi),共得到n个格心坐标;最后,采用得到的n个格心坐标进行线性拟合可得到翼前缘特征线,采用该直线与零攻角、零侧滑来流可求解出翼前缘的后掠角。本发明能够实现任意复杂外形离散网格系统翼前缘后掠角的有效求解。


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    Title :

    Method and system for determining sweepback of leading edge of aircraft wing


    Additional title:

    一种飞行器翼前缘后掠角的确定方法及系统


    Contributors:
    LIU XIAOWEN (author) / CHEN GANG (author) / MA LINJING (author) / YANG YUNJUN (author)

    Publication date :

    2024-04-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



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