传统脊形乘波体设计中,设计型线参数调整复杂且设计直观性欠佳。为此,本文提出基于 B 样条曲线的脊形上表面设计方法,通过控制点直接调整设计型线,提升设计灵活性与便捷性。利用 Bezier 曲线构建底部型线,结合吻切锥理论确定前缘与下表面底部型线,采用三次和二次 B 样条曲线构建上表面型线。通过 CFD (Computational Fluid Dynamics)方法验证方法可靠性,分析脊形乘波体的气动性能。结果表明:随着攻角逐渐增大,脊形上表面对气动特性的影响逐渐减弱,最大升阻比出现在攻角4°至6°范围内。所提方法为乘波体设计提供了更直观的型线优化手段,对工程化设计具有参考价值。

In traditional chined waverider design, the adjustment of design profile parameters is complex and the design intuitiveness is insufficient. To address these issues, this paper proposes a chined upper surface design method based on B-spline curves. The design flexibility and convenience are improved by directly adjusting the design profile through control points. The base profile is constructed by means of Bezier curves, the leading edge and lower surface base profile are determined using the osculating cone theory, and the upper surface profile is designed using cubic and quadratic B-spline curves. The reliability of the proposed method is verified by computational fluid dynamics (CFD) methods, and the aerodynamic performance of the chined waverider is analyzed. The results demonstrate that, as the angle of attack gradually increases, the influence of the chined upper surface on aerodynamic characteristics weakens gradually, and the maximum lift-to-drag ratio appears at the angle of attack ranging from 4° to 6°. The proposed method provides a more intuitive profile optimization means for waverider design, which has reference value for engineering design.