engleski

Numerical Modelling of the Combustion Process in a Jet Engine Combustion Chamber Using the Chemical Kinetics and Flamelet Generated Manifold Approaches

In this thesis a feasibility analysis of a chemistry simplification approach for jet engine applications was performed. A reaction mechanism of the JP-10 aviation fuel was used to conduct combustion simulations in a can-type combustion chamber. The combustion process was initially modeled using the general gas phase reactions approach, where an additional set of transport equations was solved for each chemical species involved. Afterwards, the tabulated chemistry approach was employed, specifically the Flamelet-Generated Manifold based AVL TABKIN™ combustion model. The ignition was initiated with the spark ignition model that introduces energy in certain points which is beyond the fuel activation energy. The fuel injection was described by the Euler- Lagrangian discrete particle approach, where the WAVE model was employed for liquid atomization. Obtained results were presented, with the emphasis on the compromise between result deviation and reduction in turnaround times. Simulations were performed with the computational dynamics software AVL FIRE™ and the chemistry tabulation was performed by AVL TABKIN™ Table Generation Tool.

Modelling, Combustion, Jet Engine, Tabulated kinetics

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