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https://hdl.handle.net/2440/130888
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Type: | Journal article |
Title: | Temperature imaging of mobile BaMgAl10O17:Eu phosphor aggregates under high radiation flux |
Author: | Zhao, W. Kueh, K.C.Y. Nathan, G.J. Alwahabi, Z.T. |
Citation: | Optics and Lasers in Engineering, 2021; 137:1-8 |
Publisher: | Elsevier |
Issue Date: | 2021 |
ISSN: | 0143-8166 1873-0302 |
Statement of Responsibility: | Wanxia Zhao, Kimberley C.Y.Kueh, Graham J.Nathan, Zeyad T.Alwahabi |
Abstract: | Planar laser-induced phosphorescence (PLIP) has been used for the temperature measurement of suspended phosphor aggregates. Two-dimensional surface temperature of fluidized phosphor aggregates was measured through a pair of spatial and wavelength resolved images in an environment where phosphors are heated by high-flux radiation. The heating was supplied by a multi-diode laser system which provides a well-characterized high-flux radiation up to 28.87 MW/m2. Phosphors made of BaMgAl10O17:Eu (BAM) were selected as the material and suspended in a fluidized bed. Single-shot temperature imaging of BAM aggregates were inferred and compared at several heat fluxes. With the increasing heat flux up to 28.87 MW/m2, the BAM aggregates were found to exhibit a wider range of temperature distribution, and the maximum average aggregate temperature achieved 723 K, while the maximum temperature of a single aggregate could reach up to 1063 K. The wider temperature distributions that observed under higher radiation fluxes were caused by the elevated temperature of cooling air and the non-uniform aggregate surfaces. This non-intrusive method of measuring temperature offers advantages over other available methods in the study of heat transfer processes involving high-temperature reactions. |
Keywords: | Planar temperature imaging of suspended aggregates; laser-induced phosphorescence (LIP); thermographic phosphors; homogeneous radiation heating |
Rights: | Crown Copyright © 2020 Published by Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.optlaseng.2020.106398 |
Grant ID: | http://purl.org/au-research/grants/arc/DP180102045 http://purl.org/au-research/grants/arc/LE130100127 |
Published version: | http://dx.doi.org/10.1016/j.optlaseng.2020.106398 |
Appears in Collections: | Aurora harvest 8 Physics publications |
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