Design Improvment of GTCP85-180 Micro Gas Turbine Combustor

In this paper, combustion in a GTCP85-180 micro gas turbine combustor is simulated using ANSYS FLUENT in three dimensions by using non-premixed model and given temperature profile. In addition, the chamber is optimized. A Realizable k-ε model is used for turbulence modeling and DO model is used to obtain radiation intensity. The main fuel that is currently used in this type of micro turbine is JP4. Considering that this type of fuel is imported and also according to its pollution, methane as a more available as well as a clean and cheap fuel can be a viable alternative for this micro turbine. The main objective in this research is that without any changes in combustion chamber dimensions and inlet flow, besides achieving an appropriate pattern for methane injection as well as acceptable flame, to attain the optimized chamber. The Flame obtained in this study was acceptable and average outlet temperature of the combustion chamber is proportional to the performance of micro turbine. The results were compared with simulation results for this chamber with kerosene fuel showing the very low percentage of error. The design improvement results show that the temperature in the primary zone of the chamber which causes damage to the parts, has been reduced significantly.