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Proceedings Paper

Miniaturized total temperature probe based on fibre Bragg gratings
Author(s): Leonhard Polz; Tasja Berghaus; Markus Klose; Andreas Zeisberger; Hartmut Bartelt; Johannes Roths
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Paper Abstract

A miniaturized design of a fibre-optic based total temperature probe is presented which is intended to be used for aircraft engine testing. The FBG-based probes were experimentally characterized in the harsh environment of an open jet test bench at air stream velocities up to Mach numbers of 0.8 and they showed similar performance as conventional sensing techniques. The reduction of the size of the transducer was possible by using small sized FBG-based temperature sensors. Due to the smaller probe design and thinner signal transmission cables, less distortion of the air stream is expected with the fibre-optic sensor, when compared to conventional instrumentation. This allows a higher density of instrumented sensors and thus a higher spatial resolution of the measurement. This is, to our knowledge, the first demonstration of total temperature measurements at high air stream velocities with FBG-based transducers.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91579F (2 June 2014); doi: 10.1117/12.2059473
Show Author Affiliations
Leonhard Polz, Hochschule für Angewandte Wissenschaften München (Germany)
Tasja Berghaus, Hochschule für Angewandte Wissenschaften München (Germany)
Markus Klose, Hochschule für Angewandte Wissenschaften München (Germany)
Andreas Zeisberger, MTU Aero Engines (Germany)
Hartmut Bartelt, Institut für Photonische Technologien e.V. (Germany)
Johannes Roths, Hochschule für Angewandte Wissenschaften München (Germany)

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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