微型涡喷发动机喘振故障的预警技术研究  

Research on early warning technology of surge fault of micro-turbojet engine

作　　者：马浩祎 蔡景[1] 杨天策 MA Haoyi;CAI Jing;YANG Tiance(College of Civil Aviation,Nanjing University of Aeronautics and Astronautics,Nanjing Jiangsu 210016,China)

机构地区：[1]南京航空航天大学民航学院,江苏南京210016

出　　处：《中国安全科学学报》2023年第S01期209-214,共6页China Safety Science Journal

基　　金：民航安全能力建设(2021-198)。

摘　　要：为有效预警微型涡喷发动机(MTE)的压气机喘振故障,首先,通过在发动机仿真模型中进行故障注入来确定喘振故障对应的发动机相关参数;其次,在微型涡喷发动机试验台上加装对应监测参数的传感器,采集卡采集并传输数据,并进行多次试车试验;然后,在0~140000 r/min转速区间内选取6个特征转速点,结合仿真模型与MTE试车数据,计算特征转速点下参数的故障阈值;最后,基于LabVIEW设计1个喘振故障预警程序,并在MTE试验台上设计喘振故障试验以验证预警程序的可行性。结果表明:压气机喘振故障影响最大的2个参数为压气机出口压力与燃烧室出口温度;当MTE出现喘振现象时,压气机出口压力骤降且燃烧室出口温度大幅升高;故障预警程序不仅能够实时监测参数变化并发出告警,还能及时停止发动机工作,保障试验人员安全。In order to effectively warn of the compressor surge fault of an MTE,the relevant engine parameters corresponding to the surge fault were determined by fault injection in the engine simulation model.Sensors corresponding to the monitoring parameters were installed in the MTE bench test,and data were collected and transmitted through the acquisition card.Multiple test runs were conducted.Then six characteristic speed points were selected in the speed range of 0-140000 r/min,and the simulation model and MTE test run data were combined to calculate the fault threshold of the parameters at the characteristic speed points.Finally,an early warning program for the surge fault based on LabVIEW was designed,and the feasibility of the early warning program was verified by designing a surge fault test on the MTE test bench.The results show that the two parameters most affected by the compressor surge fault are the outlet pressure of the compressor and the outlet temperature of the combustion chamber.When MTE surges,the outlet pressure of the compressor drops,and the outlet temperature of the combustion chamber rises sharply.The early warning program can not only monitor the parameter changes in real time and issue an alarm but also stop the engine in time to ensure the safety of the test personnel.

关 键 词：微型涡喷发动机(MTE) 压气机喘振 故障预警 故障注入 LABVIEW 

分 类 号：X949[环境科学与工程—安全科学]