Turbomachinery blade vibrations can cause High Cycle Fatigue, which reduces blade life. In order to observe this vibration a non-intrusive monitoring system is sought. The vibration can be detected by measuring blade tip timing since in the presence of vibration the blade timing will differ slightly from the passing time calculated from rotor speed. Much research and development has gone into investigating the ability of optical probes to achieve this. However, this paper looks at the potential for a dual use capacitance probe sensor to measure both tip timing and tip clearance. This paper provides new insights into the ability of a commercially available capacitance probe tip clearance measurement system for application as a non-intrusive turbomachinery blade tip timing measurement device. This is done by correlating capacitance probe tip timing results with simultaneously measured blade-mounted strain gauge vibration results and precise rotational speeds. Thus the characterisation of the performance of the capacitance probe system when measuring blade vibration on a full-sized low-speed research compressor is analysed and reported.
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ASME Turbo Expo 2004: Power for Land, Sea, and Air
June 14–17, 2004
Vienna, Austria
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
0-7918-4167-7
PROCEEDINGS PAPER
The Measurement of Turbomachinery Blade Vibration Through Tip Timing With Capacitance Tip Clearance Probes
Craig Lawson,
Craig Lawson
Cranfield University, Cranfield, Bedfordshire, UK
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Paul C. Ivey
Paul C. Ivey
Cranfield University, Cranfield, Bedfordshire, UK
Search for other works by this author on:
Craig Lawson
Cranfield University, Cranfield, Bedfordshire, UK
Paul C. Ivey
Cranfield University, Cranfield, Bedfordshire, UK
Paper No:
GT2004-53563, pp. 605-613; 9 pages
Published Online:
November 24, 2008
Citation
Lawson, C, & Ivey, PC. "The Measurement of Turbomachinery Blade Vibration Through Tip Timing With Capacitance Tip Clearance Probes." Proceedings of the ASME Turbo Expo 2004: Power for Land, Sea, and Air. Volume 2: Turbo Expo 2004. Vienna, Austria. June 14–17, 2004. pp. 605-613. ASME. https://doi.org/10.1115/GT2004-53563
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