| The effect of compressibility on the structure of turbulence is an important but difficult issue in turbulence modelling. Modelling issues in both the production and dissipation of turbulent kinetic energy need to be addressed to account for Mach number effects.In the present study, the compressibility effect is investigated in the context of the two-equation model, particularly the k-The effectiveness of the modifications in predicting flow fields of increased complexity needs to be evaluated and a computational analysis of these modelling issues has been conducted. The numerical procedure is a finite-volume, multi-stage Runge-Kutta time stepping, second-order scheme with either a central difference or an upwind difference treatment of the convection terms. Flows characterized by strong streamline curvature and inhomogeneities arising due to strong shocks and rapid expansions, in the form of supersonic flow past an axi-symmetric afterbody and hypersonic flow past a projectile, have been adopted to evaluate the various modelling aspects investigated. |
