针对采用双轴向旋流杯结构的某单头部矩形燃烧室,实验研究了头部进气面积及主燃孔布局对燃烧室贫熄特性的影响.实验结果表明:一、二级旋流器进气面积的变化对燃烧室贫油熄火性能有很大影响.一级进气面积增加20%可拓宽贫熄边界11.8%;二级进气面积增加20%可拓宽贫熄边界16.6%.相反,减小一、二级旋流器进气面积都使燃烧室的贫熄性能变差.此外,主燃孔布局的变化对燃烧室贫熄边界几乎没有影响. Aimed at the single-head rectangular combustor with a biaxial swirl cup structure, the influence of the head intake area and the layout of the main burners on the lean-out characteristics of the combustion chamber was experimentally studied.The experimental results show that the first- and second- The change of air inlet area greatly affects the lean performance of the combustion chamber.The increase of first stage inlet area can broaden the lean boundary by 11.8% and the second stage inlet area by 20% can widen the lean boundary by 16.6%. Conversely, reducing the inlet area of ​​the primary and secondary cyclones deteriorates the lean-out of the combustion chamber, and furthermore, the change of the layout of the primary burners has almost no effect on the lean boundary of the combustion chamber.