Aiming at the problem of insufficient supersonic directional static stability in the tailless configuration aircraft design, an aerodynamic supersonic directional augmentation method for the after-body design is presented. Firstly, the design idea of after-body supersonic directional augmentation was made clear by the comparative analysis of the directional static stability and surface flow field between flat after-body and conventional after-body of tailless configuration. And then the influence law of the after-body shape on the supersonic directional static stability was analyzed based on the parametric configuration. Finally, the effectiveness of the after body supersonic directional stability augmentation method was verified by the comprehensive aerodynamic characteristics numerical evaluation of the typical after-body scheme. The results show that the increment of after-body lateral projected area, after-body surface spine curves and after-body surface section curves are the three most important parameters which affect the ability of after body supersonic directional augmentation. Compared to the conventional after-body, the after-body shape designed by the supersonic directional augmentation method can dramatically decrease the directional static instability of the tailless configuration at transonic and supersonic flight with drag basically unchanged.
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