Design approaches of a can premixed combustor for a micro-gas turbine

This study analyzes the working features of the micro-gas turbine combustors used in the distributed energy system, and takes the can premixed combustor as the design purpose, and integrates the existing design experience to establish the design approach of a initial structure of the can combustor with the maximum cross-sectional area determined by the pressure loss method, the dilution hole arrangement scheme determined by the equivalent area method. To verify the effectiveness of the design approach, the flow and heat transfer process of the designed results is simulated by numerical simulation software. The simulation results show that the combustor designed by this method can meet the design requirements of the pressure loss coefficient, the combustion efficiency, OTDF, and the maximum wall temperature under rated operating conditions. Moreover, stably burn still can be observed when the load reduces to only 30% of the rated power, which can adapt to the demand of variable load of power equipment in the distributed energy system.