Large-Eddy Simulations of a normal shock train in a constant-area isolator

TLDR: In this article, a large-eddy simulation of a normal shock train in a constant-area isolator model (M∞=161, Reθ≈1660) is carried out to investigate solution sensitivity with respect to a variety of physical modeling assumptions.

Abstract: Large-eddy simulation of a normal shock train in a constant-area isolator model (M∞=161, Reθ≈1660) is carried out to investigate solution sensitivity with respect to a variety of physical modeling assumptions Simulations with spanwise periodic boundary conditions are first performed, the results of which are compared with experiment and validated with a three-level grid refinement study Due to the computational cost associated with resolving near-wall structures, the large-eddy simulation is run at a Reynolds number lower than that in the comparison experiment; thus, the confinement effect of the turbulent boundary layers is not exactly duplicated Although this discrepancy is found to affect the location of the first normal shock, the overall structure of the shock train and its interaction with the boundary layers matches the experiment quite closely Observations of pertinent physical phenomena in the experiment, such as a lack of reversed flow in the mean and the development of secondary shear laye