INFRARED THERMOGRAPHY OF RADIATION OSCILATIONS IN A THREE-METER FIRE TORNADO MODEL
Section: OPTICAL INVESTIGATION OF ATMOSPHERE
Authors:
1.
Institut optiki atmosfery im. V.E. Zueva SO RAN
Type:
Сonference article
Pages:
from 152
to 156
Published:
17.08.2026
Subject area:
UDC 504.3
Language:
Russian
Keywords:
fire tornado, physical modeling, high-speed thermography, FFT analysis
Funding:
The work was carried out within the framework of a state assignment of the V.E. Zuev Institute of Atmospheric Optics of the Siberian Branch of the Russian Academy of Sciences.
Abstract:
This paper presents the results of developing a passive swirling device for the physical modeling of fire whirls. Using a composite screen with tangential slots in the Large Aerosol Chamber, a fire whirl with height fluctuations reaching up to 3 meters was generated. High-speed thermal imaging at 170 Hz enabled the registration of temperature pulsations and the calculation of their power spectra. Characteristic differences between swirling and non-swirling flames were identified: specifically, a steeper decay of the temperature pulsation power spectrum in the 1–10 Hz frequency range for the swirling configuration. The results substantiate the applicability of infrared diagnostics for the detection and remote monitoring of such structures during fire events.
This paper presents the results of developing a passive swirling device for the physical modeling of fire whirls. Using a composite screen with tangential slots in the Large Aerosol Chamber, a fire whirl with height fluctuations reaching up to 3 meters was generated. High-speed thermal imaging at 170 Hz enabled the registration of temperature pulsations and the calculation of their power spectra. Characteristic differences between swirling and non-swirling flames were identified: specifically, a steeper decay of the temperature pulsation power spectrum in the 1–10 Hz frequency range for the swirling configuration. The results substantiate the applicability of infrared diagnostics for the detection and remote monitoring of such structures during fire events.
Keywords:
fire tornado, physical modeling, high-speed thermography, FFT analysis
fire tornado, physical modeling, high-speed thermography, FFT analysis
1. M.V. Sherstobitov O vozmozhnosti obnaruzheniya vihrevyh struktur v pozhare na osnove analiza spek-trov pul'saciy temperatury v IK – diapazone // Optika atmosfery i okeana, №11 2025 DOI:https://doi.org/10.15372/AOO20251112
2. G. M.Byram, R. E.Martin Fire Whirlwinds in the Laboratory // Fire Control Notes. – Vol.23. 1962. P.13-17.
3. Wuquan Cui, Joseph L. Dowling, Mohammadhadi Hajilou, Mitchell Huffman, Bhushan Pawar, Johanna Aurell, Qingsheng Wang, Elaine Oran, Karen N. Stone, Michael J. Gollner Large-scale field experiments on enhancing In-Situ burning with fire whirls // Fuel, Volume 403, 2026, 136093, ISSN 0016-2361, doi.org/10.1016/j.fuel.2025.136093.
