定平面形状乘波体及设计变量影响分析

Analysis on Design Variables for Planform-Controllable Waverider

拓展密切锥方法的设计灵活性,提出了一种定平面形状乘波体概念。推导了设计参数与平面形状之间的泛化几何关系,使用非均匀有理B样条辅助设计,建立了头部区域可控、后掠区域可控的双后掠乘波体设计方法,并给出了此类乘波体外形参数与设计参数之间的几何关系。结合考虑黏性的乘波体性能快速预估方法评估乘波体性能,并通过CFD技术验证了设计和性能评估方法的有效性。提取设计变量,分析典型变量对乘波体性能的影响。结果表明,双后掠乘波体保持了高超声速阶段的高升阻比特性,同时具有对平面形状良好的可控性,为构建新型乘波体外形提供了思路。

The concept of one planform-controllable waverider is proposed to extend the flexibility of the osculating waverider design. The universal geometry relations between the design and planform parameters are deducted, and employing the non-uniform rational B-spline in representing the design curve to aid design, the article builds the method of the double swept waverider generation in which the blunt area and swept area are controllable. The design variables are extracted to customize the planform of the waverider. The rapid aerodynamic assessment including viscous effect, validated with the CFD technique, is applied to analyze the influence of the design variables for waverider properties. The research shows that the hypersonic high L/D property of the waverider remains with the modified planform and lays the solid foundation to design the novel waverider configurations.