Linear disturbances in hypersonic, chemically reacting shock layers. (English) Zbl 0808.76031
The effects of equilibrium- and nonequilibrium-air chemical reactions on the linear stability of a Mach 25, 10-deg half-angle sharp-cone shock layer are investigated. First, the basic state is computed using the parabolized Navier-Stokes equations with a shock-fitting scheme. This eliminates spurious numerical oscillations that could adversely affect the stability analysis. Spatial stability analyses are then described for three different approximations of the physics: perfect gas, air in local chemical equilibrium, and air in chemical nonequilibrium.
MSC:
76E05 | Parallel shear flows in hydrodynamic stability |
76V05 | Reaction effects in flows |
76K05 | Hypersonic flows |