engleski

Three-dimensional numerical simulation of combustion in a jet engine combustion chamber

The objective of this thesis is to simulate the combustion process inside a jet engine combustion chamber using Computational Fluid Dynamics. The mathematical foundations and main issues of combustion modelling are presented. The partially stirred reactor (PaSR) combustion model, coupled with the k-ε turbulence model, is validated on the Sandia Flame D test case. The influence of three-dimensional effects and reaction mechanism complexity on flow characteristics is examined. The extended Zeldovich mechanism is used to calculate NO emissions, comparing results computed using reaction mechanisms of increasing complexity to experimental data. Numerical combustion simulations are performed on the Rolls Royce Tay geometry, for two flow configurations at take-off conditions. Simulation results are compared to available experimental data. The extended Zeldovich mechanism is used to model NOx emissions, which are compared to International Civil Aviation Organization emissions data.

CFD ; OpenFOAM ; foam-extend ; PaSR ; reactingFoam ; extended Zeldovich ; Sandia Flame D ; Rolls Royce Tay

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