Gas dynamics and liquid fuel combustion in a model combustion chamber

The paper reports the results of liquid-fuel model combustor calculations based on different numerical approaches to develop a verified simulation method of combustor operation. Both steady and transient studies were carried using different RANS turbulent models and the detached eddy simulation (DES) method, and their results were compared with experimental data obtained by optical methods. RANS and hybrid eddy-resolving DES approach. Conducted comparison of the obtained results with the data of the non-contact optical experiment. The results show that the the greatest differences experiment and calculations are observed for the near-axial flow field where recirlulation backflow is formed. This vortex structure can be properly resolved in a DES solution as well as in transient calculations based on the SAS SST model. The use of the above-mentioned approaches in combination with the flamelet combustion model provides maximum accuracy in predicting the parameters of a reacting swirling flow including velocity and temperature distributions in the combustion chamber.