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13.
Influence of fuel injection configuration on NO formation inside a jet engine combustion chamber [Elektronski vir]
Cerinski, Damijan ...
Emissions of NOx from the aviation sector, contrary to the land-based sources, have doubled compared to 1990. Aircraft unique location in the upper atmosphere and daily growth of air-based traffic ...require particular attention to the effects of these emissions. One way to cope with this problem is to develop and design more efficient combustion systems. In this research, the numerical modelling of combustion process inside a jet engine combustion chamber is presented. The investigated chamber is a teoretical can type chamber mounted with a double stage radial swirler. The advanced k-zeta-f turbulence model was utilised to model the turbulent behaviour, while the spray process was described by the Euler Lagrangian spray modelling approach. The combustion process was modelled with the ECFM-3Z combustion model and for the ignition process the ISSIM spark ignition model was utilised. The influence of spray and emission processes was analysed by varying number and positioning of fuel introduction nozzle holes. It was noticed that increasing the number of nozzle holes and their correct positioning * Corresponding author can result in emission reduction. Such behaviour could be addressed to the specific spray formation and smaller high-temperature regions. Results showed that the presented model can be used as a modern design tool in the early stage of the combustion chamber development.
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