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Identification based thermal reflection compensation for radiation based temperature measurements in combustion chambers

Matthes, J.; Vogelbacher, M.; Waibel, P.; Gröll, L.

Abstract (englisch):
When monitoring wall temperatures in reactors and combustion chambers using infrared cameras, significant measurement errors occur due to the reflection of hot objects such as flames. The radiation received in the camera from the measured wall segment results from the sum of inherent wall radiation and reflected radiation. The reflection depends on the geometrical arrangement of wall, flame and camera as well as on material properties of the wall. To compensate the reflected radiation, existing methods require either detailed information about the geometrical arrangement and material properties of the reactor or a high level of technical equipment like multi-spectral cameras and polarization filters. In this paper we present a method, which does not require this information and equipment. It uses a simplified radiation model and experimental identification to determine the influence of hot objects (flames) on each wall segment of the reactor. The identified model can then be used to compensate flame reflections during normal operation of the reactor. We will demonstrate the new method using near infrared image sequences from a combustion chamber of a pilot-scale power plant.



Originalveröffentlichung
DOI: 10.1016/j.expthermflusci.2021.110354
Zugehörige Institution(en) am KIT Institut für Automation und angewandte Informatik (IAI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0894-1777, 1879-2286
KITopen-ID: 1000129936
HGF-Programm 37.12.01 (POF IV, LK 01) Digitalization & System Technology for Flexibility Solutions
Erschienen in Experimental thermal and fluid science
Verlag Elsevier
Seiten 110354
Vorab online veröffentlicht am 21.02.2021
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