为了解决燃料与空气均匀预混的问题，以气态燃料-低排放塔式同轴分级燃烧室为研究对象，采用数值模拟与实验设计数理统计方法相结合，研究了主燃级叶片角、叶片数、燃料速度和单面孔数对燃料和空气预混特性的影响，筛选出对燃料空气预混均匀性影响的显著项，并拟合得出均匀性的预测公式。结果表明：单面孔数及其平方项对预混均匀性影响最大；燃料速度与叶片角、燃料速度与单面孔数的交互效应其次；叶片数、叶片角、燃料速度及其平方项和交互项对均匀性的影响最小。

In order to solve the problem of uniform premixing of fuel and air, low emission towertype coaxialstaged combustor with gaseous fuel was selected as the research object. The effects of blade angle, blade number, the velocity of fuel and the number of oneside fuel hole in main combustion stage on the premixing characteristics of fuel and air were explored by combining numerical simulation and design of experiments. The significant terms that affected fuelair premixing uniformity were screened out, then a prediction formula for premixing uniformity was obtained by fitting. The results show that the number of singleside fuel hole and its quadratic term are the significant factors affecting the premixing uniformity; the interaction effects between the velocity of fuel and blade angle, the velocity of fuel and number of oneside fuel hole are considered as the second significant factors; the effects of blade number, blade angle and the velocity of fuel and their quadratic and interaction terms on uniformity are not significant.

TK16

国家科技重大专项（2017-III-0006-0031）