气量分配对双轴向旋流器燃烧室贫熄性能影响

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.

Effects of airflow split and primary holes arrangement on lean blowout limits of combustor with dual-axial swirlers

An experimental research was conducted for the effect of the variations of dome air entry areas and the arrangement of primary holes on the lean blowout (LBO) limits of a single dome rectangular model combustor with dual-axial swirl cups. The experimental results show that the variations of air entry areas into the swirlers will have great effect on the LBO performance of the combustors. Increasing the air entry area into the primary swirler by 20% will improve the combustor lean blowout limits about 11.8%, and increasing the air entry area into secondary swirler by 20% will improve the combustor lean blowout limits about 16.6%. On the contrary, the decrease of the air entry areas of the swirlers will deteriorate the LBO performance. Besides, the arrangement of primary holes has little effect on the combustor LBO limits.