A novel wide-speed waverider design method with variable multi-parameter along spanwise direction

The waverider configuration has emerged as a pivotal research focus in hypersonic vehicle design due to its high lift-to-drag ratio characteristics achieved through shock compression effects. However, it faced inherent challenges including significant degradation of aerodynamic performance under off-design conditions and persistent difficulties in balancing aerodynamic performance and volume. To address these issues, we developed a novel waverider design method with variable multi-parameter along the spanwise direction based on osculating theory. By generating characteristic streamline families from basic flowfields with varying Mach number-shock angle combinations, the approach achieved active control of shock wave spatial distribution, thereby simultaneously addressing off-design aerodynamic performance and volumetric requirements. The results show consistent flowfield structure between the designed waverider and numerical simulations, confirming method reliability. Under fixed-volume, fixed-length, and fixed-width constraints, variable multi-parameter waverider along the spanwise direction made average improvements of 17.01% in lift coefficient and 12.63% in lift-to-drag ratio compared to conventional fixed-parameter waveriders. The novel waverider maintained lift-to-drag ratio attenuation below 1.8% across Ma=6-10, significantly enhancing wide-speed aerodynamic performance. This methodology established a synergistic design framework for aerodynamic performance and volume through active spanwise parameter control, offering an innovative solution to overcome the limitations of the traditional waverider. The results provide valuable insights into engineering applications of wide-speed hypersonic vehicles.