为提高干低排放燃烧室火焰稳定性，对某燃气轮机干低排放燃烧室喷嘴进行了结构优化，增加了中心预混值班喷嘴，同时对燃料分配进行调整，分析了值班火焰对燃烧室的火焰稳定性和污染物排放的影响。计算结果表明：值班路过量空气系数为1.5，两级旋流过量空气系数相同时，可有效拓宽燃烧室贫燃熄火边界，同时保持较低的污染物排放。最后通过试验测试了燃烧室的贫燃熄火特性和压力脉动特性，初步验证了值班喷嘴结构对稳定燃烧的作用。

In order to widen the flame stability in a dry low emission combustor,the structure of a gas turbine combustor was modified; a premixed central pilot nozzle was added,and the fuel flow configuration was also optimized.The influence of the pilot flame on combustion stability and emission was analyzed by numerical simulation.The results showed that when the excess air ratio in pilot flow is 1.5 and those from the two-stage swirlers are equal,the presented scheme can widen lean blowout limit with low NOx emission.The pilot nozzle stabilizing the flame was also further verified by the experimental test of lean blowout characteristics and combustion oscillation of the combustor.