According to the requirements of low pollution emission of gas turbine

the combustion characteristic experiment was carried out on the single head experiment piece of the combustor of low emission micro gas turbine designed for the use of gas fuel. The position and quantity of the fuel nozzle

the fuel distribution ratio between the duty class and the main combustion stage

and the combustion efficiency and pollutant emission characteristics under different air flow distribution modes were compared and analyzed. Results showed that changing the position and quantity of the fuel nozzle can change the mixing characteristics of the fuel and air

yielding a great effect on the combustion characteristics; the change of the fuel flow distribution ratio between the duty class and the main combustion stage led to the change of the equivalence ratio of each combustion zone

and the reduction of the current ratio of the main combustion stage to below 08 was conducive to the reduction of pollutant emissions; the change of air flow distribution ratio of the combustion chamber was conducive to the reduction of pollutant emissions With this method

the equivalence ratio of the main combustion zone can be reduced

the NOx emission can be reduced to 272 mg/m3

and the combustion efficiency can reach 986%. However

the decrease of air flow rate for mixing could increase the outlet temperature distribution coefficient from 021 to 024.