作者：何赒, 蒋佳佳, 叶德超, 段发阶, 李杨宗

作者单位：天津大学 精密测试技术及仪器国家重点实验室, 天津 300072

关键词：光纤传感器;叶片振动;叶尖定时;高温传感;主动冷却

摘要：

针对现有高温光纤式叶尖定时传感器最高耐温只到650 ℃，无法满足更高温度条件下燃气轮机叶片振动监测需求的问题，研究并设计一种采用主动冷却方式的高温光纤式叶尖定时传感器。为提高传感器的耐温性能，采用中空式的结构设计以及主动冷却的降温方式提高传感器探头的耐温性能。应用Ansys有限元分析软件进行热-流-固耦合分析，对传感器设计的可靠性进行理论论证。在此基础上，对设计的高温光纤式叶尖定时传感器进行高温试验验证。结果表明：试验结果与仿真结果具有良好的一致性，该传感器工作温度最高可达1 300 ℃，满足大多数高温环境下燃气轮机叶片振动参数监测的要求。

An actively cooled high-temperature optical fiber tip-timing sensor
HE Zhou, JIANG Jiajia, YE Dechao, DUAN Fajie, LI Yangzong
State Key Lab of Precision Measuring Technology & Instruments, Tianjin University, Tianjin 300072, China
Abstract: For the existing high-temperature optical fiber tip-timing sensor, the maximum temperature resistance is only 650 ℃, which can not meet the requirements of gas turbine blade vibration monitoring under higher temperature conditions. A high-temperature optical fiber tip-timing sensor with active cooling is studied and designed. In order to improve the temperature resistance of the sensor, the hollow structure design and the cooling method of active cooling improve the temperature resistance of the sensor probe. Thermal-flow-solid coupling analysis was performed using Ansys finite element analysis software to theoretically demonstrate the reliability of sensor design. On this basis, the designed high-temperature optical fiber tip-timing sensor was tested by high temperature test. The results show that the test results are in good agreement with the simulation results. The operating temperature of the sensor can reach up to 1 300 ℃, which meets the requirements of gas turbine blade vibration parameter monitoring in most high temperature environments.
Keywords: optical fiber sensor;blade vibration;tip-timing;high temperature sensing;active cooling
2020, 46(1):88-92  收稿日期: 2019-08-10;收到修改稿日期: 2019-09-15
基金项目: 国家自然科学基金（51775377）
作者简介: 何赒(1996-),男,湖南永州市人,硕士研究生,专业方向为传感器研究与旋转叶片振动监测
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