Analysis of susceptibility of CO and NOx pollutants due to change of stabilizing jets characteristics in a gas turbine model combustion chamber

The purpose of the present study was to investigate the susceptibility of NOx and CO pollutants due to the change of stabilizing jets characteristics in a gas turbine model combustion chamber. The change of stabilizing jet characteristics were analyzied according to their interactions. To simulate the two-phase flow inside the combustion chamber, the Eulerian method was used for gas flow and the Lagrangian method was used for spraying the fuel. For simulating the combustion The purpose of the present study was to investigate the susceptibility of NOx and CO pollutants due to the change of stabilizing jets characteristics in a gas turbine model combustion chamber. The change of stabilizing jet characteristics was analyzed according to their interactions. To simulate the two-phase flow inside the combustion chamber, the Eulerian approach was used for gas flow and the Lagrangian approach was employed for spraying the fuel. For simulating the combustion process inside the combustion chamber, the RANS approach, the Realizable k-ε model for turbulence, Discrete Ordinates Model (DOM) for radiant heat transfer and steady flamelet combustion model were applied. NOx modeling was done by post-processing with a finite rate model. Using a sensitivity analysis, the effects of variations of input variables including diameter, angle and position of the stabilizing jets on output variables were studied. Numerical data were generated by using Design of Experiments (DOE) and full factorial model. The results were inspected by the means of analysis of variance (ANOVA). The results indicated that with considering the interaction among jets characteristics, the trends of pollutants changes could be observed more accurately. Nevertheless, this was not possible without considering the interactions.  The purpose of the present study was to investigate the susceptibility of NOx and CO pollutants due to the change of stabilizing jets characteristics in a gas turbine model combustion chamber. The change of stabilizing jet characteristics was analyzed according to their interactions. To simulate the two-phase flow inside the combustion chamber, the Eulerian approach was used for gas flow and the Lagrangian approach was employed for spraying the fuel. For simulating the combustion process inside the combustion chamber, the RANS approach, the Realizable k-ε model for turbulence, Discrete Ordinates Model (DOM) for radiant heat transfer and steady flamelet combustion model were applied. NOx modeling was done by post-processing with a finite rate model. Using a sensitivity analysis, the effects of variations of input variables including diameter, angle and position of the stabilizing jets on output variables were studied. Numerical data were generated by using Design of Experiments (DOE) and full factorial model. The results were inspected by the means of analysis of variance (ANOVA). The results indicated that with considering the interaction among jets characteristics, the trends of pollutants changes could be observed more accurately. Nevertheless, this was not possible without considering the interactions.  .