中心分级燃烧室主燃级设计参数的试验研究

Experimental Study on Main Mixer Design Parameters for Central Staged Combustor

关键词:  民用航空发动机  燃烧室  主燃级设计  分级燃烧  试验

Key words:  Civil aero engine  Combustor  Main mixer design  Lean burn combustion  Test

摘要:

为研究中心分级燃烧室的主燃级设计，设计了多个主燃级方案，并在单头部燃烧室试验件上开展试验研究。试验结果表明：燃油停留时间对燃烧效率影响最大，喷点个数和旋流数对燃烧效率也有一定的影响，级间距对燃烧效率的影响主要体现在小状态；级间距、喷点个数对NO_x排放影响最大。在本次研究的试验方案中级间距变化对燃烧稳定性的表现有明显的影响。

Abstract:

To study main mixer design parameters effect on combustion performance， several main mixers are designed and test on single cup combustor is performed. Test results show that fuel fly time is the most important influence factor on combustion efficiency， main fuel nozzle number and SN number are the second influence factors， stage gap influences combustion efficiency only on low load working condition. For NO_x emission， gap and nozzle number are the most important influence factors. Stage gap is found to be the most important influence factor on combustion instability.