A compromise between lean blowout characteristics and overall performances in the gas turbine combustor primary zone design is introduced.A uniform and a local rich fueling designs of dome have been made

and tests for comparing the influence of the two designs on combustor lean ignition and blowout limits have also been carried out in an experimental annular combustor.Ignition and blowout regulations of the local rich fueling design have been analyzed and summarized.The results show that the local rich fueling design can widen the combustor lean ignition and blowout limits apparently.