Stagnation Pressure Effect on the Supersonic Two-Dimensional Plug Nozzle Design

The aim of this work is to develop a new calculation program to study the stagnation pressure effect of the combustion chamber on the design of the supersonic two-dimensional plug nozzle giving a uniform and parallel flow at the exit section. The model is based on the use of the real gas（RG） approach. The co-volume and the intermolecular interaction effect are taken into account by the use of the Berthelot state equation. The molecular vibration effect is taken into account in our model to evaluate the behavior of the gas at high temperature. The stagnation pressure and the stagnation temperature are important parameters in our model. At the lip, the temperature and the density are given by the resolution of a two nonlinear algebraic equations, which are formulated by an integration of four complex functions. The resolution is made by a new, robust and a fast algorithm. The other parameters are determined by analytical relations. The flow expansion in the nozzle is of the Prandtl Meyer type. The nozzle contou