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AIR6406 - The Use of Blade Sensors for Turbine Engine Health Monitoring

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Document Number: AIR6406
Project Initiation: 08-08-2012
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Sponsor Name: Stephen Arnold
Title
The Use of Blade Sensors for Turbine Engine Health Monitoring
Scope
The purpose of this Aerospace Information Report (AIR) is to provide an introduction to the use of blade sensors in aviation engine health monitoring systems. The document generally lays out the motivation for blade monitoring. It then provides an introduction to types of sensors used in this application and discusses what types of phenomena may be detected by them. Finally, the document discusses practical considerations for the implementation of blade sensors for health monitoring of operational aviation engines.
Rationale
Increased use of blade sensors (primarily clearance and time of arrival in test situations) has resulted in more information being available on the state of blades, disks, and other turbine engine components. Advancing technologies now enable real-time, long-term monitoring of these components in fielded engines. The potential for the use of the blade sensors in permanent health monitoring applications exists to significantly improve the safety of engine operation by earlier indication of impending turbine engine component failure (such as disk cracks or blade liberations), and reduce the cost of engine operation through more intelligent and targeted maintenance, repair, and overhaul operations.
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