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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。
To expand the design flexibility of the close cone method, a concept of multiplying wave body with a fixed planar shape is proposed. The generalized geometrical relationship between design parameters and plane shape is deduced. With the aid of non-uniform rational B-spline design, a design method of dual-sweep body with controllable head region and controllable swept area is established. The geometric relationship between such multiplicative wave shape parameters and design parameters is presented. The performance of multiplicator is evaluated with the fast prediction method of multipath performance considering viscosity, and the effectiveness of the design and performance evaluation method is verified by CFD. Extract design variables and analyze the influence of typical variables on multipath performance. The results show that the double-swept wave body maintains the characteristics of high lift-drag ratio in the hypersonic phase, and has good controllability of the planar shape, providing a new idea for constructing a new wave-shaped body.