Prévision de transition sur la trajectoire du vol Reentry-F avec les PSE à l'équilibre chimique

Abstract

International audienceThe laminar-turbulent transition is a key feature of hypersonic flows on reentry vehicles. For a smooth wall, its position can be estimated by a stability analysis of the boundary-layer, using the Local Stability Theory (LST) or the Parabolized Stability Equations (PSE). These techniques have been applied to the trajectory of Reentry-F flight experiment, assuming an axisymmetric flow and air at thermochemical equilibrium. The results have been compared with experimental data and results from previous published works. The transition is found to move gradually closer to the nose when the altitude decreases and the Reynolds number increases