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Study of the effectiveness of extinguishing model fires of coniferous and deciduous wood

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Category: Content №1 2025

Last Updated on 25 February 2025

Published on 30 November -0001

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Authors:

A.A.Renkas, orcid.org/0000-0002-5518-3508, Lviv State University of Life Safety, Lviv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V.V.Popovych, orcid.org/0000-0003-2857-0147, Lviv State University of Life Safety, Lviv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

I.V.Pasnak, orcid.org/0000-0002-8405-4625, Lviv State University of Life Safety, Lviv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V.I.Tovarianskyi*, orcid.org/0000-0002-4484-8164, Lviv State University of Life Safety, Lviv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

^* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2025, (1): 070 - 075

https://doi.org/10.33271/nvngu/2025-1/070

Abstract:

Purpose. Establishing the feasibility of using the FDS computer model to determine the specific consumption rate of finely sprayed water for extinguishing wood as an alternative to physical modeling.

Methodology. The study utilized the functionality of the Fire Dynamics Simulator (FDS) computer model; a methodology for determining the consumption and volume of extinguishing agents for extinguishing model fires of type 1A for various wood species within a specially designed testing ground for experimental fire tests; the results of the research were processed using Microsoft Excel.

Findings. According to the results of computer modeling, it was established that for the combustion of selected wood species over a duration of 0–180 seconds, the highest temperature in the fire center occurs for fir at 173 seconds, reaching 1,180 °C. The peak temperature in the combustion environment for common pine is observed at 170 seconds, measuring 1,165 °C. The temperatures for silver birch and common oak were lower, at 1,000 °C (178 seconds) and 855 °C (173 seconds), respectively. After applying finely sprayed water to the fire center of the model fires made of pine and fir, the temperature decreased below the ignition point after 57 seconds, with a water consumption rate of 2 l/s. For the extinguishing of model fires made of oak and birch, the extinguishing effect was observed at 135 and 105 seconds, respectively. Based on the conducted research, the specific consumption rates of finely sprayed water for extinguishing common oak and common pine were determined to be 168 and 120 l/m³, respectively.

Originality. For the first time, the Fire Dynamics Simulator (FDS) computer model was used to simulate the extinguishing process for four of the most common types of forests – common pine, Douglas fir, silver birch, and common oak. It was established that when extinguishing fires in coniferous wood species with a finely sprayed water consumption rate of 2 l/s, the extinguishing effect is achieved at 57 seconds.

Practical value. The conducted computer modeling and experimental field studies allowed for the determination of the calculated amount of finely sprayed water needed for extinguishing fires in various wood species. The specific consumption rates of extinguishing agents for fighting fires in coniferous and deciduous wood species can be used for calculating the forces and resources required for firefighting in forested areas.

Keywords: model fire, computer modeling, field experimental studies, extinguishing wood, finely sprayed water

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