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本文给出了栅格翼和机身、机身和发动机以及机身的台阶与其前后柱体等复杂气动力干扰的计算方法．考虑栅格翼与机身气动干扰时，假定栅格翼处在机身的横向流动的上洗流场中，用翼片理论计算有机身影响时栅格翼上载荷分布．考虑机身和发动机气动干扰时，采用一个机身和四个发动机组成的十字型五体组合体模型，用保角变换算出干扰因子．考虑机身台阶与其前后柱体的气动干扰时，采用锥柱体和截锥结合实验修正的方法．用本方法计算了栅格翼与机身发动机组合体气动特性，得到了比较满意的结果
In this paper, the calculation methods of the grid aerofoil, fuselage, fuselage and engine, the fuselage steps and complex aerodynamic interferences such as the front and rear columns are given. Considering the aerodynamic interference between the grid wing and the fuselage, the wing theory is used to calculate the load distribution on the grid wing with the influence of the fuselage, assuming that the grid wing is in the upper wash flow field of the fuselage. Consider the fuselage and engine aerodynamic interference, the use of a fuselage and four engines composed of cross-shaped five-body model, using conformal mapping to calculate the interference factor. Consider the fuselage steps and the aerodynamic interference of its front and rear columns, the use of cone cylinder and truncated cone combined with experimental correction method. With this method, the aerodynamic characteristics of grid wing and fuselage engine combination are calculated, and the satisfactory result is obtained