Abstract: For four kinds of swirlers with different rotating directions combinations, the experimental study of the centrally-staged combustor under different inlet air parameters at atmospheric pressure was carried out, and the combustion rules under the experimental conditions was obtained. The test results show that: The rotational direction of pilot stage has obvious influence on combustion performance, and the rotational direction of primary stage has a certain effect on combustion. When the rotational direction combinations is clockwise-counterclockwise-counterclockwise, the lean blow out performance is better than others, the lean blow out fuel-air-ratio is 6.6×10^-3; and the CO and UHC emission performance and combustion efficiency are better, the lowest CO emission is 98mg/m³, UHC is 650mg/m³, and the highest efficiency is 97.1%. However, when the rotational direction combinations is clockwise-counterclockwise-clockwise, its lowest out temperature distribution coefficient (OTDF) value is 0.21, and its outlet temperature characteristics are better.

Key words: Combustor;Swirler;Combustion performance;Rotational direction combinations;Pilot stage;Primary stage

摘要： 针对四种不同旋向组合的旋流器，进行了常压下中心分级燃烧室在不同进气参数条件下的试验研究，获得了在试验条件下的燃烧规律。试验结果表明：值班级旋向对燃烧性能有明显的影响，主燃级旋向对燃烧有一定作用；当旋向组合为顺-逆-逆时，燃烧室贫油熄火性能比其他方案较好，贫油熄火时油气比为6.6×10^-3，同时，CO，UHC排放性能及燃烧效率较优，CO排放最低达到98mg/m³，UHC排放最低达到650mg/m³，效率最高达到97.1%；但旋向为顺-逆-顺时，其出口温度分布系数（OTDF）最低为0.21，出口温度特性较好。

关键词: 燃烧室;旋流器;燃烧性能;旋向组合;值班级;主燃级