DJEROUAT Anes Mohammed RyadBOUNIF . A2026-10-012026-10-012026https://dspace.univ-temouchent.edu.dz/handle/123456789/7708This work focuses on the numerical simulation (CFD) using the RANS approach of turbulent supersonic flows within a turbojet nozzle. The study consists of modeling fluid behavior and shock wave dynamics by evaluating the influence of several physical and operational parameters. The methodology integrates a numerical model validation phase, a comparative analysis of turbulence models, and an investigation of steady versus unsteady regimes. In addition, a parametric analysis is conducted to characterize the impact of inlet pressure and temperature variations on the flow. Finally, the work includes the modeling and thermochemical analysis of a reactive hydrogen-air flow within the divergent section.frSupersonic nozzleTurbojetNumerical simulation (CFD)RANSParametricThesis