Experimental Test on a Syngas Model Combustor With Flameless Technology

The research of combustor for gas turbine using flameless combustion technology is in the stage of laboratory. This paper designs a flameless model combustor using syngas, which has similar flow structure with reverse-flow can-type combustors and therefore could be used in typical small gas turbine system. In this combustor, either the premixed or non-premixed mode can be selected, meanwhile the difference is discussed. CFD methods are used to design the flow field and emissions of a combustor with detailed mechanisms. How the distance between the nozzle and axis influences the recirculation zone is discussed and optimized in the Isight platform. In the experimental test, the emissions and dynamic pressure characteristics are the main focus. The results demonstrate that flameless combustion technology has potential to be applied in gas turbine with syngas for the aim of Ultra-low pollutant emission combustion, which can restrict emission in a low level meanwhile maintain combustion stability. Flameless combustion is a rising ultra-low-pollution combustion technology. However, in this combustor when pilot flame existed, in some conditions the thermoacoustic oscillation was observed. The CFD results illuminates that this combustor ensures the recirculation in the primary zone, meanwhile the position of the nozzle and injection’s velocity have significant effect to the flow field.