Investigation of supersonic wakes using conventional and hybrid turbulence models

Abstract

Transitional and turbulent supersonic wakes behind axisymmetric bodies with a blunt base are investigated numerically using state-of-the-art Reynolds averaged Navier-Stokes models and the flow simulation methodology. The centerpiece of the flow simulation methodology is a strategy to provide the proper amount of modeling of the subgrid scales. This is accomplished by a "contribution function" which locally and instantaneously compares the smallest relevant scales to the local grid size. The turbulence closures chosen are a state-of-the-art wall-distance free explicit algebraic stress model, or a standard K-ε model for comparison. Axisymmetric Reynolds averaged Navier-Stokes and fully three-d..