NUMERICAL-ANALYSIS FOR SUPERSONIC TURBULENT MIXING LAYERS OF DIFFERENT GAS SPECIES - (MIXING CHARACTERISTICS OF NONUNIFORM FLOWS)

A numerical technique for investigating the mixing characteristics of supersonic turbulent flow with different gas species, in which a two-e quation turbulence model was employed, was presented in the first repo rt. This report clarifies the effect of inlet flow profiles on the mix ing phenomena by adopting distributed flow profiles obtained for a sup ersonic wedge-shaped nozzle outlet as the inlet boundary conditions fo r the mixing calculations. The general conclusion is that mixing layer s with distributed inlet flow profiles are thicker than those with uni form profiles. Furthermore, the relationships of the growth rates of m ixing layers with distributed inlet flow profiles to the changes in th e velocity ratios and density ratios are similar to those of layers wi th uniform profiles.