Optimized Research for Aero Engine Off-gas Monitor

Abstract

Since the majority of aero engine faults are aero engine gas path faults, it is important to monitor its working condition. But the monitoring is under the condition where electrostatic signal of charged particles in aero engine gas path is weak and the sensor works in an environment of high temperature and high noise, so that it is difficult to monitor continuously. Using the gas-solid two phase flow device to simulate the aero engine gas path, and designing a signal processing circuit and simulate the signal processing circuit in the software MULTISIM, and using the software LabVIEW to establish the virtual instrument data acquisition system, a monitoring model which include a data acquisition system and a aero engine gas path fault analyze system is designed. As a result, the model which can be adapted to high temperature and high noise, and is sensitive to charge signal, has the advantages of high resolution, high signal-to-noise ratio, and high stability, could be operated steadily and continuously in various working condition of aero engine, and could provide a reliable basis for fault diagnosis of aero engine gas path.