FIBER OPTIC LASER DOPPLER PROBE FOR IN-SITU TIP CLEARANCE AND VIBRATION MONITORING AT TURBO MACHINES

Thorsten Pfister, Lars Büttner, Jürgen Czarske, Richard Schodl, Hartmut Krain

Abstract

We report about a novel optical method based on laser Doppler techniques for shape and vibration monitoring of fast rotating objects. Tip clearance and vibration measurements on a transonic centrifugal compressor preformed during operation at up to 50,000 rpm and 586 m/s blade tip velocity are presented. The results are in excellent agreement with those of capacitive probes and the achieved accuracy was about 20 µm.

Keywords

shape and vibration monitoring, laser Doppler techniques, tip clearance

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PWC-2006-TC22-004u.pdf

DOI

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IMEKO TC

TC22 - Vibration Measurement

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