Perturbation Effects on a Supercritical C₇H₁₆/N₂ Mixing Layer

This report presents a computational-simulation study of effects of perturbation wavelengths and initial Reynolds numbers on the transition to turbulence of a heptane/nitrogen mixing layer at supercritical pressure. The governing equations for the simulations were the same as those of related prior studies reported in NASA Tech Briefs. Two-dimensional (2D) simulations were performed with initially imposed spanwise perturbations whereas three-dimensional (3D) simulations had both streamwise and spanwise initial perturbations.