高超声速"准乘波体"构型优化设计方法

The waverider configuration has a wide application prospect in the design of hypersonic vehicles due to its excellent aerodynamic efficiency. Various kinds of waveriders have been developed based on different basic flowfield, which can be chosen according to different design requirements. However, it's generally difficult for the waverider to directly satisfy the engineering requirements of volume efficiency, trim, stability, etc. To overcome these drawbacks, the paper proposes a new design method of hypersonic waverider configuration. In the generation process, the leading edge of the original waverider is kept unchanged. Then at different longitudinal cross section, the profile of the lower surface is determined by the same curve equation, started from the point at the leading edge and cut off at the base plane. The profile function is determined by the sum of a series of power law functions, whose coefficients can be changed according to different design requirements. Different waveriders are obtained according to different constraints. Results show that for this kind of configurations, good shock attachment near the leading edge can be achieved and the pressure distribution on the lower surface is uniform. What's more, the maximum lift-to-drag ratio is even higher than that of the original waverider. Different waveriders with excellent aerodynamic efficiency can also be generated by different constraints of volume efficiency and stability.