高超音速后掠激波与边界层干扰流场特性

应用表面油流和液晶温度显示、表面热流率和压力测量四种测试技术,在Ma_∞=7.8、单位长度雷诺数尺Re_∞=3.5×10~7/m条件下,研究了30°迎角尖前缘翼面诱导激波和湍流边界层干扰流场特性。结果表明:表面流动是准锥型,在强相互作用下,流动发生了二次分离和再附,导致表面油流线的流向角、温度、热流率和压力分布均出现明显的凹坑。

SURFACE FEATURE IN HYPERSONIC SWEPT SHOCK AND BOUNDARY LAYER INTERACTION

Experimental investigation of surface features in a swept shock turbulent boundary layer interaction induced by a sharp fin at angle of attack of 30 ° is performed using surface oil-dot visualization, liquid crystal surface thermography, surface heat transfer and pressure measurements. The nominal test condition is free stream Mach number of 7.8, unit Reynolds number of 3.5× 107/ m. The study shows that the surface flow is quasi-conical. There are both secondary separation and attachment in the strong interaction. The streak deflection, surface heat transfer and pressure distributions show distinct dip associated with secondary separation.