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A Two-stage Polynomial Method for Spectrum Emissivity Modeling

Qiu, Qirong, Liu, Shi, Teng, Jing, Yan, Yong (2015) A Two-stage Polynomial Method for Spectrum Emissivity Modeling. Energy Procedia, 66 . pp. 245-248. ISSN 1876-6102. (doi:10.1016/j.egypro.2015.02.042)

Abstract

Spectral emissivity is a key in the temperature measurement by radiation methods, but not easy to determine in a combustion environment, due to the interrelated influence of temperature and wave length of the radiation. In multi-wavelength radiation thermometry, knowing the spectral emissivity of the material is a prerequisite. However in many circumstances such a property is a complex function of temperature and wavelength and reliable models are yet to be sought. In this study, a two stages partition low order polynomial fitting is proposed for multi-wavelength radiation thermometry. In the first stage a spectral emissivity model is established as a function of temperature; in the second stage a mathematical model is established to describe the dependence of the coefficients corresponding to the wavelength of the radiation. The new model is tested against the spectral emissivity data of tungsten, and good agreement was found with a maximum error of 0.64%

Item Type: Article
DOI/Identification number: 10.1016/j.egypro.2015.02.042
Uncontrolled keywords: Spectral Emissivity; measurement
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts > Instrumentation, Control and Embedded Systems
Depositing User: Tina Thompson
Date Deposited: 22 Jan 2016 12:43 UTC
Last Modified: 29 May 2019 16:54 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/53827 (The current URI for this page, for reference purposes)
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