不同雾化特性下燃烧室贫油熄火特性试验  

Experiment on lean blow-out performance of combustors with different atomization characteristics

作　　者：王惜伟 黄勇[1,2,3] 刘云峰 邬雨帆 王洪妍 WANG Xiwei;HUANG Yong;LIU Yunfeng;WU Yufan;WANG Hongyan(School of Energy and Power Engineering,Beihang University,Beijing 100191,China;National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics,Beihang University,Beijing 100191,China;Collaborative Innovation Center for Advanced Aero-Engine,Beijing 100191,China)

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100191 [2]北京航空航天大学航空发动机气动热力国家级重点实验室,北京100191 [3]先进航空发动机协同创新中心,北京100191

出　　处：《航空动力学报》2022年第11期2501-2512,共12页Journal of Aerospace Power

基　　金：国家科技重大专项(2017-Ⅲ-0007-0032);重点实验室基金(6142702180306)。

摘　　要：为了研究雾化特性对贫油熄火性能的影响,对喷雾火焰进行了试验研究。在双轴向和双径向旋流器燃烧室中,分别测量了不同喷嘴的熄火极限和出口温度,并估算了燃烧效率。结果表明:①不同结构和喷嘴的燃烧室熄火性能有很大差异,双径向燃烧室的熄火性能普遍优于双轴向;②雾化特性中的索太尔平均直径、液滴速度、喷雾空间分布等参数都影响着贫油熄火极限,仅靠索太尔平均直径无法代表所有雾化特性对贫油熄火性能的影响;③空心喷雾使得火焰根部远离回流区,实心喷雾使得火焰根部集中在回流区;④不同雾化特性的燃烧室在接近贫油熄火时的燃烧效率和出口温度有很大不同。熄火时的出口温度代表了理想的贫油熄火极限。燃烧效率反映了燃烧室实际贫油熄火极限与理想熄火极限之间的差距。In order to investigate the effects of atomization characteristics on the lean blow-out(LBO)performance,an experimental study was carried out on the spray and the combustion.The LBO limits and outlet temperatures near the LBO condition of different atomizers were measured and the combustion efficiency was estimated in a single dome rectangular model combustor with a dual-radial and a dual-axial swirl cup,respectively.The results showed that,(1)the LBO performance of the combustors with different structures and atomizers was very different.The LBO performance of the dual-radial combustors was generally better than that of the dual-axial combustors.(2)There was no obvious correlation between spray Sauter mean diameter(SMD)and LBO limit,and SMD alone cannot represent the influence of all atomization characteristics on LBO performance.(3)The hollow spray kept the flame base away from the recirculation zone,and the solid spray kept the flame base concentrated in the recirculation zone.(4)The combustion efficiency and outlet temperature of combustors with different atomization characteristics were very different near the LBO.The outlet temperature at LBO represented the ideal LBO limit.The combustion efficiency reflected the difference between the actual LBO limit and the ideal LBO limit.

关 键 词：雾化特性 旋流稳定燃烧室 贫油熄火 燃烧效率 出口温升 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]