In the present work, surface thermometry using a method based on the spectroscopy of inorganic luminescent material was applied in the afterburner of a full-size aircraft jet engine. The technique uses laser-induced emission from thermographic phosphors for nonintrusive remote temperature diagnostics in combustion applications with high sensitivity and accuracy. A phosphor material having suitable temperature sensitivity in the expected temperature range was applied to the surface of interest in the engine afterburner. Phosphorescence radiation was generated using the forth harmonic (266 nm) from a pulsed Nd:YAG laser. The resulting signal was detected with a photomultiplier tube and phosphorescence lifetime decay curves were recorded for various engine loads, including operation of the afterburner. By analyzing the phosphorescence decay, temperature data were acquired through implementation of a regression equation extracted from well-defined calibration measurements on the phosphor used. Quantitative temperature data recorded with a repetition rate of 10 Hz are presented. The laser-induced phosphorescence technique for surface thermometry has proven its applicability in the extremely harsh environment prevailing inside and next to a jet engine operating at full load.
Laser-induced phosphorescence for surface thermometry in the afterburner of an aircraft engine
Laser-induzierte Phosphoreszenz für die Oberflächen-Thermometrie im Nachbrenner eines Flugzeugtriebwerks
AIAA Journal (online) ; 45 , 12 ; 2966-2971
2007
6 Seiten, 9 Bilder, 17 Quellen
Article (Journal)
English
British Library Conference Proceedings | 2007
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