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Infrared Thermographic Diagnostics of Wood Fire Resistance under Combined Thermal Effect Conditions from a Ground Fire Front and Firebrands
- Authors: Kasymov D.P.1,2, Agafontsev M.V.1, Perminov V.A.2
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Affiliations:
- National Research Tomsk State University
- National Research Tomsk Polytechnic University
- Issue: No 10 (2024)
- Pages: 51-58
- Section: Thermal methods
- URL: https://bakhtiniada.ru/0130-3082/article/view/266825
- DOI: https://doi.org/10.31857/S0130308224100058
- ID: 266825
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Abstract
Experiments were conducted on certain types of combustible building materials and wood-based structures to determine the interaction between firebrands and forest fuel (FF). Using non-contact IR diagnostic methods in narrow spectral ranges of infrared wavelengths, the heat flux values generated by firebrands and the temperature field of the most heat-stressed sections of the structures under study were determined. Using a JADE J530SB thermal imager with an optical filter of 2,5—2,7 m, temperatures in the range 310—1500 K were measured in the infrared region. In order to interpret the recorded emission from the test sample, calibrations supplied by the narrowband optical filter manufacturer were used.
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About the authors
D. P. Kasymov
National Research Tomsk State University; National Research Tomsk Polytechnic University
Author for correspondence.
Email: denkasymov@gmail.com
Russian Federation, Tomsk; Tomsk
M. V. Agafontsev
National Research Tomsk State University
Email: kim75mva@gmail.com
Russian Federation, Tomsk
V. A. Perminov
National Research Tomsk Polytechnic University
Email: perminov@tpu.ru
Russian Federation, Tomsk
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Supplementary files
Supplementary Files
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JATS XML
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Fig. 1. Photo of the experimental stand just before the experiment
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Fig. 2. Installation of burning and smouldering particles generation [19]
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Fig. 3. Instantaneous thermogram of the process of flame exposure on the model fence structure
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Fig. 4. Curves of distribution of the surface temperature field of the considered wood samples in time: a, b - solid fence; c, d - blown type fence (stakes)
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Fig. 5. Thermogram of burning development of pine needles near the surface of wooden fence
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Fig. 6. Change of flame temperature during pine needles burning: a - experiment with a solid enclosure; b - blown type enclosure
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