摘要
根据发动机的工作原理和组成结构,各单元体的热力方程相似、单元体间的流量相等以及转子功率平衡,应用小偏差理论建立了部件性能参数与整机性能参数关系的数学模型。通过性能分离,仅表示发生故障时的单元体性能参数变化量,不包含发生故障后各单元体重新匹配达到平衡时的性能参数变化量。最后通过采集航空发动机指印图中单元体性能参数的衰退量计算整机性能参数的变化量,并与采集的发动机性能参数变化量进行比较,验证了模型的有效性。通过数学模型可以确定发动机单元体性能变化对整机性能的影响,为发动机故障诊断和排查提供了理论参考。
According to the working principle and composition of aircraft engine,as well as the similar thermal equations of each module,equal flow between engine modules and rotor power balance,the relationship mathematical model of performance parameters between engine and components is established by applying small deviation theory. Through performance separation,the model only represents the change of module performance parameters when faults occur,without the change of performance parameters when each module is re-matched after faults. Finally,the variation of engine performance parameters is calculated by collecting the decay of module performance parameters in aero-engine finger print. The model effectiveness is verified by comparing with the changes of acquired engine performance parameters. The impact of engine module performance changes on the performance of whole engine is confirmed by the current model,providing theoretical reference for engine fault diagnoses and troubleshooting.
作者
曹惠玲
刘乃彬
薛鹏
于天浩
CAO Huiling;LIU Naibin;XUE Peng;YU Tianhao(School of Aeronautical Engineering,University of Civil Aviation of China,Tianjin 300300;Engineering Technology training Center of China Civil Aviation University,Tianjin 300300)
出处
《中国民航大学学报》
CAS
2019年第2期23-28,共6页
Journal of Civil Aviation University of China
基金
中央高校基本科研业务费专项(3122014D010)
关键词
航空发动机
单元体性能
热力过程
小偏差理论
数学模型
areo-engine
module performance
thermal process
small deviation theory
mathematical model
作者简介
曹惠玲(1962-),女,河北唐山人,教授,博士,研究方向为航空发动机性能分析与故障诊断.
