Numerical Visualization of Propagating Shock Waves and Induced Flow in a Branched Duct

In this paper, the behavior of propagating shock wave and the detail of induced flow in a branched duct were visualized by numerical simulation in order to clarify the sabilizing process of the transmitted shock. The computation was carried out by solving two dimensional and compressible Navier-Stokes equations using the total variation diminishing(TVD) scheme. Numerical simulation was performed for four types of the branch, and the flow fields were numerically visualized by the contour lines of pressure, Mach number, vorticity, velocity vectors, sonic lines, pressure distribution on the walls and wave diagram. The stabilizing process and the attenuation of the transmitted shock, the production of the vortex and the formation of the secondary shock were observed clearly.