针对燃气轮机实际运行过程中不同火焰筒之间的空气流量畸变问题，以回流燃烧室为研究对象，开展三维数值模拟，分析进气流量改变对燃烧室多物理场分布特征和燃烧室性能的影响。结果表明：进气流量偏离理想设计对燃烧室回流区结构、温度场、总压恢复系数和燃烧效率等参数产生不利影响，而对燃烧室空气流量分配比例、主燃孔和掺混孔射流深度等参数的影响不明显；随着进气流量的减小，燃烧火焰拉长，燃烧室出口温度均匀性变差，燃烧效率急剧降低。

Aiming at the inlet flow rate distortion of different combustors during the actual operation of gas turbine,the threedimensional numerical simulation was carried out by using a counterflow combustor as research object.The effects of inlet flow rate variation on the multiphysical fields distribution characteristics and performance parameters of combustor were analyzed in detail.The results show that when the inlet flow rate deviates from the ideal design,the recirculation zone,temperature field,total pressure recovery coefficient and combustion efficiency of combustor are becoming bad.However,the parameters of air flow ratio and jet depths of primary and dilution holes are affected indistinctively.Besides,with the decrease of inlet flow rate,flame can be lengthened,the outlet temperature uniformity becomes worse,and the combustion efficiency decreases sharply.

TK471

国家科技重大专项（Y2019-I-0022-0021,2017-III-0006-0031)