红外测温系统在航空发动机轮盘试验中的应用

摘要

This paper discussed the basic theory of infrared temperature measurement and the working principle of infrared radiation thermometers. The authors designed and developed the non-contract infrared temperature measurement system suitable for aeroengine turbine disk test, analyzed the main factors which influence the measuring accuracy of the infrared temperature measurement system and researched the calibration method of emissivity. Test verification was carried out under the conditions of the turbine disk in static and in rotation respectively. The results showed that the most important factor which influences measuring accuracy of the infrared temperature measurement system was emissivity and the method of calibrating the emissivity with thermocouple is feasible and the emissivity of stationary state was same with its rotation station. The emissivity calibrated at stationary state can be used to measure the temperature of the aeroengine turbine disk at rotation station.%该文论述了红外测温基本理论和红外测温仪工作原理,设计开发了适用于航空发动机轮盘试验的非接触红外测温系统,分析影响红外测温系统测量准确度的主要因素,研究发射率的确定方法,在轮盘静止和旋转状态下进行了试验验证.其结果表明:影响红外测温系统测量准确度最重要的因素是发射率；用热电偶对发射率进行确定的方法是可行的；轮盘在静止和旋转状态下的发射率相同,静止状态下确定的发射率可用于旋转状态下的温度测量.