摘要
高超声速飞行器在性能提升方面受到了高波阻热流、强激波干扰以及进气道空气捕获效率低等多重挑战。本研究通过利用激光等离子体技术有效调控了高超声速波阻、IV型激波干扰以及激光诱导虚拟唇口,实现了飞行器性能的提升。研究发现,激光击穿空气后可形成高温高压等离子体,并迅速膨胀产生冲击波。冲击波与弓形正激波发生相互作用将其变为弱的斜激波,使飞行器表面压力和温度降低,实现减阻降温。此外,弓形激波随脉冲激光的持续加载和准静态波向下游的传播逐渐增大,呈现出正相关关系,有效地缓解了IV型激波干扰。利用激光等离子体形成的虚拟唇口在空气捕获量、总压恢复系数和绝热动能效率方面分别提升了9.4%、4.8%和1.1%,有效提升了进气道空气捕获率。
Hypersonic vehicles face multiple challenges in performance enhancement,including high wave drag and heat flux,intense shock wave interference,and low air capture efficiency of the inlet.This study effectively regulates hypersonic wave drag,type IV shock wave interference,and laser-induced virtual cowl lips through the utilization of laser plasma technology,thereby achieving performance improvements in the vehicle.It is found that after laser breakdown of air,high-temperature and highpressure plasma is formed,which rapidly expands to generate a shock wave.This shock wave interacts with the bow shock wave,transforming it into a weaker oblique shock wave,thereby reducing the surface pressure and temperature of the vehicle and achieving drag and temperature reduction.Additionally,the bow shock wave gradually increases with the continuous application of pulsed lasers and the downstream propagation of quasi-static waves,exhibiting a positive correlation,effectively mitigating type IV shock wave interference.The virtual cowl lip formed by laser plasma technology enhances air capture capacity,total pressure recovery coefficient,and adiabatic kinetic energy efficiency by 9.4%,4.8%,and 1.1%,respectively,effectively improving the air capture rate of the inlet.
作者
文明
韩建慧
王殿恺
WEN Ming;HAN Jianhui;WANG Diankai(Space Engineering University,Beijing 101416,China)
