Review of aero-engine blade tip timing: measurement, monitoring, diagnosis, and evaluation
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摘要:
从叶片振动测量、振动监测、故障诊断与运行状态评估4个方面对航空发动机叶端定时技术进行了系统性概述,总结了近年来国内外在叶端定时系统关键技术方面的主要研究成果。国内外学者围绕叶片位移测量、叶片振动参数辨识、叶片裂纹故障诊断与叶片应变重构等方面取得了显著进展。认为未来叶端定时技术的研究应重点在5个方面实现突破:从冷端叶片到热端叶片叶端定时测量的拓展,从多传感向单传感叶端定时测量的演进,从低频低阶到高频高阶振动监测的延伸,从发动机地面测试向机载应用的跨越,以及从信号处理向叶端定时智能监测的升级,以持续提升航空发动机运行的安全性与可靠性。
Abstract:A comprehensive review of aero-engine blade tip timing (BTT) technology was conducted from four perspectives: blade vibration measurement, vibration monitoring, fault diagnosis, and operational condition assessment, and major advancements in key BTT technologies achieved globally in recent years were summarized. Significant progress was made in areas such as blade displacement measurement, vibration parameter identification, crack fault diagnosis, and strain field reconstruction. Looking ahead, future research on BTT is expected to achieve breakthroughs in five key directions: extending its application from fan and low-pressure compressor blades to high- and low-pressure turbine blades; advancing from multi-sensor to single-sensor measurement architectures; expanding monitoring capabilities from low-frequency, low-order modes to high-frequency, high-order modes; transitioning from engine ground testing to in-flight implementation; and evolving from conventional signal processing to intelligent, autonomous BTT-based health monitoring. These advancements could contribute to further enhancing the operational safety and reliability of aero-engines.
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Key words:
- rotor blade /
- blade tip timing /
- vibration measurement /
- condition monitoring /
- fault diagnosis
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表 1 叶端定时非接触式传感器特点对照表
Table 1. Comparison of characteristics of non-contact blade tip timing sensors
类型 应用场景 优点 缺点 涡流传感器 汽轮机叶片振动监测 对污染物不敏感;
准确度高;
适合长期监测易受磁干扰;
易受环境影响;
耐高温性能较差电容传感器 叶尖间隙测量 成本低;
能长期监测温度适中;
对污染物敏感;
分辨率低光纤传感器 冷端叶片振动监测 高分辨率;
成本适中;
对叶片材料无要求带宽有限;
易污染;
耐高温性能较差;
不适合长期监测微波传感器 旋转叶片振动、叶尖间隙 高温;
抗污染性制造昂贵;
需要调整工作频率;
需要校准有限的空间分辨率 -
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