Numerical Research on NOx Emissions of Micro-Turbine Oxygen-Enriched Combustor
The low-NOx combustor of 50 kW micro-turbine is designed in the mode of flue gas recirculation and oxygen-enriched combustion,and numerical software is used for its combustion simulation computation.The study focuses on composition distribution and NOx formation rule from several aspect such as inlet oxygen concentration,moisture and inlet temperature.As the results show,the combustor outlet NOx concentration increases with the increase of inlet temperature and oxygen concentration,and also with the decrease of water.In the combustor the equipotential surface of low NOx formation rate fill the flame tube ; the equipotential surface of high NOx formation rate distributes in the flame downstream transition region and mixing cooling zone where the oxidizing atmosphere enhances.Micro-turbine combustor adopts a fully premixed combustion mode of an oxy-fuel gas recirculation no matter how the inlet parameters change.NOx emission concentration at the combustor outlet is lower than 5 × 10-5 mol/mol,capable of realizing the clean combustion of low NOx.
50 kW micro-turbinelow-NOx combustoroxygen-enriched combustionflue gas recirculation
NETL
NSTL
万方数据
维普
