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Surface thermometry by laser-induced fluorescence of Dy3+:YAG

Published online by Cambridge University Press:  04 July 2016

K. Kontis ,
Y. Syogenji  and
N. Yoshikawa
K. Kontis
Affiliation:
UMIST, Manchester, UK
Y. Syogenji
Affiliation:
Nagoya University, Nagoya, Japan
N. Yoshikawa
Affiliation:
Nagoya University, Nagoya, Japan
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Abstract

A novel, non-intrusive, high spatial and temporal resolution thermal imaging system, based on the fluorescence properties of a dysprosium doped yttrium-aluminum-garnet (Dy3+:YAG) thermographic phosphor, has been developed. In this system, the phosphor coating on the test surface is excited by a pulsed Nd:YAG laser. The resulting fluorescent emission of the temperature sensitive 456nm transition and that of the temperature independent 496nm transition, are acquired using a pair of image-intensified charged coupled device cameras. The ratio of the acquired emissions is then correlated to temperature. The Dy:YAG phosphor displays temperature sensitivity in the range of 295–l,350K (with possibility up to 1,800K). Temperature measurements obtained from the surface of a disk heated by an impinging jet, demonstrate the feasibility of this technique for general heat transfer studies involving significant unsteadiness and transient phenomena.

Type
Research Article
Information
The Aeronautical Journal , Volume 106 , Issue 1062 , August 2002 , pp. 453 - 457
Copyright
Copyright © Royal Aeronautical Society 2002 

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