A numerical study for small amplitude T-S waves in a supersonic boundary layer

The propagation of the disturbance waves in a boundary layer at Mach number=4,5 is studied by direct numerical simulation (DNS), using NND scheme, and different amplitudes A=0.01, 0.001, 0.0001 of the disturbance have been assumed. The numerical result shows that there might be shocklets induced in the boundary layer, even when the amplitude of disturbance wave is still small. Paper from ZHOU Heng, Member of Editorial Committe, AMM Foundation item: the National Climbing Project of China (19732005) Biographies: YUAN Xiang-jiang (1962-) ZHOU Heng (1929-)