Low-coherence interferometric tip-clearance probe.
- 2003-08-09
Published in:
- Optics letters. - 2003
English
We propose an all-fiber, self-calibrating, economical probe that is capable of near-real-time, single-port, simultaneous blade-to-blade tip-clearance measurements with submillimeter accuracy (typically < 100 microm, absolute) in the first stages of a gas turbine. Our probe relies on the interference between backreflected light from the blade tips during the 1-micros blade passage time and a frequency-shifted reference with variable time delay, making use of a low-coherence light source. A single optical fiber of arbitrary length connects the self-contained optics and electronics to the turbine.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1364/ol.28.001323
- PMID 12906077
- Persistent URL
- https://sonar.ch/global/documents/52560
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