STUDY OF THE POSSIBILITY OF DETECTING A FIRE TORNADO IN A FIRE BY THERMAL IMAGING METHOD
Authors:
1.
Institut optiki atmosfery im. V.E. Zueva SO RAN
Type:
Сonference article
Published:
26.06.2025
Subject area:
VAK Russia 1.3.6
UDC 53.023
CSCSTI 29.01
Russian Classification of Professions by Education 03.04.02
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 613
BISAK SCI053000 Physics / Optics & Light
UDC 53.023
CSCSTI 29.01
Russian Classification of Professions by Education 03.04.02
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 613
BISAK SCI053000 Physics / Optics & Light
Language:
Russian
Keywords:
thermal imaging method, power spectrum
Funding:
This work was supported by the Ministry of Science and Higher Education of the Russian Federation (V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Sciences).
Abstract (English):
In the big aerosol chamber of the Institute of Atmospheric Optics SB RAS, two isopropanol flame plumes were simultaneously investigated using the thermal imaging method. One of them was a vortex flame obtained by blowing around a stationary container installed on the axis of an ascending swirling air flow, and the other was in a container without blowing. Using the fast Fourier transform of the time pulsations of the thermal imaging signal, the power spectra of the pulsation frequencies were calculated. In the calculated spectra, a frequency interval was established where a significant difference between the mentioned flames was observed. The influence of the distance and the averaging effect of the size of the initial region of obtaining the thermal imaging signal on the difference in the flame spectra was numerically investigated.
In the big aerosol chamber of the Institute of Atmospheric Optics SB RAS, two isopropanol flame plumes were simultaneously investigated using the thermal imaging method. One of them was a vortex flame obtained by blowing around a stationary container installed on the axis of an ascending swirling air flow, and the other was in a container without blowing. Using the fast Fourier transform of the time pulsations of the thermal imaging signal, the power spectra of the pulsation frequencies were calculated. In the calculated spectra, a frequency interval was established where a significant difference between the mentioned flames was observed. The influence of the distance and the averaging effect of the size of the initial region of obtaining the thermal imaging signal on the difference in the flame spectra was numerically investigated.
Keywords:
thermal imaging method, power spectrum
thermal imaging method, power spectrum
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