A dry low emission (DLE) micro gas turbine combustor with variable nozzle position and multi-point fuel injection was put forward. In order to gain the effect of different fuel-staged methods on the combustion performance for the combustor

and the effect of fuel distribution mode between pilot and primary on combustion performance

different distribution modes of the combustor were experimentally studied by numerical simulation. Results showed that: the change of fuel nozzle position had little effect on the emissions. With the increase of two-stage fuel distribution ratio

the NOx emissions decreased first and then increased

and there existed an optimal fuel distribution ratio to minimize NOx emissions. There existed obviously a primary recirculation zone (PRZ) in combustor

helping to facilitate ignition and propagation of flame. The amount of thermal NOx produced was directly related to the size of the region above 1 950 K and the highest gas temperature. The NOx emissions of the designed combustion can be reduced to below 50 mg/m3 under all working conditions with natural gas as fuel

which can reach the level of low-emission combustion (less than 50 mg/m3).