Fig.1

Physical models"

Fig.2

Computational domain, CPU and grid distributions"

Tab.1

Boundary conditions"

Tab.2

Atmospheric standard parameters at 20$\sim$50 km flight altitudes"

Tab.3

Jet flow parameters"

Fig.3

Density distributions of the supersonic flow on a plate"

Fig.4

Velocity distributions of the supersonic flow boundary layer on a plate"

Fig.3

Changes of the pressure curves under three kinds of grids"

Fig.6

Supersonic flow acts on the double backward-facing steps at different flight altitudes"

Fig.7

Vortex structure at the bottom of the double backward-facing step at 20 km flight altitude"

Tab.4

Wall temperatures of the double backward-facing step at different flight altitudes"

Fig.8

Density steps of jet flow at different flight altitudes"

Fig.9

Velocity distributions on half section of jet flow at different flight altitudes (0.05 away from the nozzle)"

Tab.5

Angles of jet flow shear layer at different flight altitudes"

Fig.10

Density steps of supersonic flow/jet flow interaction at different flight altitudes"

Fig.11

Axial velocity distributions of only jet flow and supersonic flow/jet flow interaction at 20 km flight altitudes"

Fig.12

Velocity distributions on half section of only jet flow and supersonic flow/jet flow interaction at different flight altitudes (0.05 away from the nozzle)"

Tab.6

Angles of jet shear layer at different flight altitudes"

Fig.13

Vortex structures of supersonic flow/jet flow interaction at different flight altitudes"

Tab.7

Temperatures of BC section of supersonic flow/jet flow interaction at different flight altitudes"

Tab.8

Temperatures of CD section of supersonic flow/jet flow interaction at different flight altitudes"