摘要
以商用涡扇发动机中心分级贫油低排放燃烧室为研究对象,使用扫描电子显微镜、高分辨率透射电子显微镜、差分电迁移光谱仪等微/宏观颗粒物表征仪器,分析了发动机在慢车与起飞阶段,不同当量比对航空排放碳烟颗粒的纳米结构、微观形貌、粒径分布等特征的影响。结果表明:慢车阶段排放的碳烟颗粒平均数密度显著高于起飞阶段的,且基元颗粒粒径更大、条纹长度更短、条纹弯曲度更大,在燃烧室中的停留时间更长;在起飞工况下,提高燃烧室当量比在一定程度上能增大基元颗粒粒径。起飞工况的碳烟颗粒数目浓度相比慢车工况的低约3个数量级。研究成果可为优化航空发动机低排放燃烧室设计、降低碳烟颗粒排放提供数据支持,对指导改善机场区域环境质量具有重要意义。
Focusing on the center-staged lean-burn low-emission combustor of a commercial turbofan engine,micro/macro particle characterization instruments like scanning electron microscopy,highresolution transmission electron microscopy,and DMS 500 were used to analyze the impact of different equivalence ratios on the nanostructure,micro-morphology,and size distribution of aviation-emitted soot particles during idle and take-off conditions.Results indicate that soot particles in the idle condition have a significantly higher average number concentration than that of the take-off condition.They also feature larger primary particle sizes,shorter fringe length and larger fringe tortuosity,and longer residence times within the combustor.During the take-off condition,increasing the equivalence ratio leads to an enlargement of the primary particle size of carbon soot and a reduction in its average number concentration by nearly three orders of magnitude compared to that of the idle condition.This research provides data support for optimizing aviation engine combustor design and curbing soot emissions,which is of great significance for enhancing the environmental quality in airport areas.
作者
李光泽
章振中
常刘勇
赵一蔚
陈龙飞
张弛
薛鑫
王晶
LI Guangze;ZHANG Zhenzhong;CHANG Liuyong;ZHAO Yiwei;CHEN Longfei;ZHANG Chi;XUE Xin*;WANG Jing(Hangzhou International Innovation Institute,Beihang University,Hangzhou 311115,China;National Key Laboratory of Science and Technology on Aero-Engine Aero-Themodynamic,School of Energy and Power Engineering,Beihang University,Beijing 100191,China;Advanced Technology Research Department,AECC Commercial Aircraft Engine Co.,Ltd.,Shanghai 200241,China)
出处
《燃气涡轮试验与研究》
2025年第6期23-32,共10页
Gas Turbine Experiment and Research
基金
中国航发集团产学研合作项目(HFZL2023CXY010)
国家自然科学基金(52576160,52306181,52306184)
浙江省自然科学基金青年探索项目(LMS25E060005,LMS25E060004)。
关键词
航空发动机
中心分级燃烧室
排放
慢车工况
起飞工况
碳烟颗粒
aero-engine
centrally staged combustor
emission
idle condition
take-off condition
soot particles
