航空发动机喘振测量系统动态校准研究

Research on Dynamic Calibration of Aero-engine Surge Measurement System

喘振测量是避免航空发动机由于出现气动失稳导致空中停车、叶片断裂等严重事故的重要手段。喘振测量系统用于在航空发动机即将出现喘振或喘振初期,能够准确地识别出喘振。本文基于现有动态压力校准装置进行喘振压差传感器动态校准、高低温特性测试和喘振电调控制器联调动态特性测试,为航空发动机喘振测量系统减少误判和漏判提供有力保障。进行喘振测量系统动态校准,对研究航空发动机气动失稳现象并提高发动机可靠性具有重要意义。

Surge measurement is an important method to avoid serious accidents such as the shutdown in the air and blade fracture caused by aerodynamic instability of aero-engine.Surge measurement system is used to accurately identify the surge when the aero-engine is about to surge or at the early stage of surge.In this paper,based on the existing dynamic pressure calibration device,the high and low temperature characteristic test of the surge differential pressure sensor and the dynamic characteristic test of the surge measurement system are tested,which will greatly decrease the chance of misjudgment and missed judgment of the aero-engine surge measurement system.The dynamic calibration of surge measurement system is of great significance to the study of aero-engine aerodynamic instability and the improvement of engine reliability.