双后掠乘波体设计及性能优势分析

根据密切锥乘波体的设计几何关系,提出双后掠乘波体概念,给出了双后掠乘波体设计的参数与生成乘波体外形之间的关系。使用非均匀有理B样条(NURBS)表达包括圆和直线的激波出口型线辅助设计,研究了钝头区域可控、后掠区域可控的乘波体外形设计方法。使用CFD数值计算方法验证了设计方法的有效性,同时研究了双后掠乘波体外形的性能优势,结果表明在保持高超声速高性能的基础上适当设计外形在低速状态、纵向稳定性和涡效应增升方面具有性能优势,为大空域宽速域高超声速飞行器的研制开拓了新的途径。

Design and property advantages analysis of double swept waverider

Based on the design of osculating cone waverider,the concept of double swept waverider is proposed.The relationships between design parameters and configuration parameters are derived.Employing the non-uniform rational B-spline (NURBS) to represent the design curve including circular arc and straight line to aid the waverider generating,this paper develops the method for creating the waverider with controllable configuration parameters,including the blunt head area,the sweep angle and the swept area.The computational fluid dynamics technology is applied to validate the effect of the design method,and the advantageous performances of the waverider are also studied.Results show that with appropriate configuration,the waverider has advantageous performances in subsonic characteristics,aerodynamic stability and nonlinear vortex lift,while maintaining the high hypersonic performance.The method provides a novel way to design the wide-velocity-range hypersonic vehicles.