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A Microwave Blade Tip Clearance Sensor for Propulsion Health MonitoringMicrowave sensor technology is being investigated by the NASA Glenn Research Center as a means of making non-contact structural health measurements in the hot sections of gas turbine engines. This type of sensor technology is beneficial in that it is accurate, it has the ability to operate at extremely high temperatures, and is unaffected by contaminants that are present in turbine engines. It is specifically being targeted for use in the High Pressure Turbine (HPT) and High Pressure Compressor (HPC) sections to monitor the structural health of the rotating components. It is intended to use blade tip clearance to monitor blade growth and wear and blade tip timing to monitor blade vibration and deflection. The use of microwave sensors for this application is an emerging concept. Techniques on their use and calibration needed to be developed. As a means of better understanding the issues associated with the microwave sensors, a series of experiments have been conducted to evaluate their performance for aero engine applications. This paper presents the results of these experiments.
Document ID
Document Type
Technical Memorandum (TM)
Woike, Mark R.
(NASA Glenn Research Center Cleveland, OH, United States)
Abdul-Aziz, Ali
(Cleveland State Univ. Cleveland, OH, United States)
Bencic, Timothy J.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 24, 2013
Publication Date
June 1, 2010
Subject Category
Mechanical Engineering
Report/Patent Number
AIAA Paper 2010-3308
Meeting Information
Meeting: Infotech@Aerospace 2010 Conference
Location: Atlanta, GA
Country: United States
Start Date: April 20, 2010
End Date: April 22, 2010
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 645846.
Distribution Limits
Public Use Permitted.
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