低压条件下复合式多级旋流杯燃烧室燃烧效率研究

Research of Combustion Efficiency of Combustors Using Hybrid Airblast Atomizer under Low Pressure

对低压(常压或低于常压)条件下航空发动机燃烧室的燃烧效率作了初步的研究,主要目的是研究复合式多级旋流杯燃烧室燃烧效率的改进。复合式多级旋流杯组织方案由离心雾化和旋流杯空气雾化组成,采用双油路,副油路为小流量离心喷嘴,主油路为直射式喷嘴匹配空气雾化,头部采用三级涡流器组织燃烧。燃油采用RP-3航空煤油。使用单头部燃烧室为试验件,在常压和低压状态下,模拟燃烧室进口速度和总油气比。燃烧效率采用燃气分析法,用效率分析仪进行测量。研究结果表明,复合式多级漩流杯燃烧组织方案能改善低压下的燃烧,提高燃烧效率。

Preliminary investigation of combustion efficiency under low pressure was carried out. This study is aimed at the enhancement of combustion efficiency using the hybrid multistage swirling cup. The hybrid multistage swirling cup was made up of a pilot simplex nozzle combined with airblast atomizer. A single nozzle combustor was fabricated for combustion efficiency test. Combustor inlet velocity and overall fuel/air ratio were simulated under low pressure condition. The gas sampling was used for the combustion efficiency measurement. The results show that the hybrid multistage swirling cup can improve combustion and enhance combustion efficiency with combustor inlet pressure ranged from 0.07 MPa to 0.11 MPa.