Rublyv V. Integrated method of analysis of afterburner exhaust units of turbojet by-pass engines

Subject of analysis is the working process occurring in afterburner exhaust units (AEU) of turbojet by-pass engine. The purpose of analysis is to increase efficiency of turbojet by-pass engine AEU having calculated its operating process taking into account irregularity of excess oxygen coefficient and streamline turbulent characteristics. Method: model of separate flow of gas and liquid phases was used to calculate mixture formation taking into account influence of finite transfer velocities between phases. Numerical procedure based on application of Euler-Lagrange approach was used to calculate gas phase that allows to calculate three-dimensional compressible nonsteady flow within AEU, which is described with Navier-Stokes equations averaged by Reynolds number and one-parameter model of turbulent viscosity. Differential equations of liquid phase were solved applying the Runge-Kutta method. Turbulent combustion was taken into account by application of semi-empirical theory. Novelty lies in developmentof integrated analysis of turbojet engine nozzle thrust for augmented power. As a result, geometry and fuel atomization parameters were changed so to provide increased efficiency of AEU operating process.