Optical measurement of local temperatures in a semi-industrial pulverized coal flame by infrared spectroscopy

Jean Crabol; Bruno Potier; Olivier Mace

doi:10.1117/12.23112

1 November 1990 Optical measurement of local temperatures in a semi-industrial pulverized coal flame by infrared spectroscopy

Jean Crabol, Bruno Potier, Olivier Mace

Author Affiliations +

Proceedings Volume 1341, Infrared Technology XVI; (1990) https://doi.org/10.1117/12.23112
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

The method described is based on emission-absorption of thermal radiation in the near infrared between 1 and 5 μm. Unlike conventional optical methods, it allows the determination of local temperatures rather than an average temperature integrated along aiming line of the pyrometer. The particle and gas temperature radial fields together with the relative particle concentration radial fields in a semi-industrial pulverized coal flame have been established. The distributions which have been obtained show that industrial flames are neither isothennal nor homogeneous. Particle and gas temperature profiles exhibit the same shape but particle temperatures are about 100°C higher than gas temperatures. Measurements have also been made with a suction pyrometer and the results obtained are generally found between those determined for the particules and gases respectively.

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Jean Crabol, Bruno Potier, and Olivier Mace "Optical measurement of local temperatures in a semi-industrial pulverized coal flame by infrared spectroscopy", Proc. SPIE 1341, Infrared Technology XVI, (1 November 1990); https://doi.org/10.1117/12.23112

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