一种新的航空发动机气路监测方法  

New Method for Aero Engine Gas Path Monitoring

作　　者：文振华[1] 左洪福[1] 李耀华[1] 

机构地区：[1]南京航空航天大学民航学院,南京210016

出　　处：《南京航空航天大学学报》2009年第2期248-252,共5页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家高技术研究发展计划("八六三"计划)(2006AA04Z427)资助项目;国家自然科学基金(60672164)资助项目

摘　　要：分析了气路中颗粒物的产生以及颗粒荷电的机理、气路静电监测方法的原理,并通过模拟实验对该方法进行了初步的研究。实验监测信号表明,气路中异常颗粒产生的感应信号幅值随着粒径的增加而增加,通过小波分析的方法将信号进行分解到不同的频段并获得相应的能量分布。结果表明异常颗粒产生的信号的能量分布集中在低频部分,为判断异常颗粒提供了依据。实验结果表明了基于颗粒静电监测方法能够有效地监测到异常颗粒,证明了该方法的可行性。The formation mechanism of charged-particles in gas path of aero engine and the foundational principle of electrostatic monitoring method are analyzed. The preliminary experiment research on gas path electrostatic monitoring method is carried out. The monitoring signal shows that the amplitude of the induced signal increases with the particle diameters. Then the wavelet transform method is used to decompose signal into different frequency bands and acquire relevant energy distribution. The result shows that the energy of induction signal induced by abnormal particle concentrates on the low frequency band and provides a basis for determining abnormal particle. The experiment and data indicate that the method based on particle electrostatic can effectively detect abnormal particles, thus proving its feasibility.

关 键 词：航空发动机 排气系统监测 静电传感器 小波分析 

分 类 号：V231.25[航空宇航科学与技术—航空宇航推进理论与工程]