Procedure for constructing a mathematical model to determine the time of the initial stage of fire evolution

Authors

DOI:

https://doi.org/10.15587/1729-4061.2021.225221

Keywords:

fireproof wood, fire retardant, impregnating substance, ignition temperature, fire impact

Abstract

To develop appropriate measures and means of fire protection at facilities, it is relevant to form an idea of the phenomenology of the processes of the occurrence, evolution, and termination of combustion. This paper proposes procedures for building mathematical models of the energy component of those physicochemical processes that occur in wood under the influence of fire, which make it possible to determine the time from the beginning of such an impact to the onset of the phase of flame combustion. The adequacy of mathematical modeling was tested experimentally at a standardized installation for studying flame propagation over the surface of wood. The samples used for the reported theoretical and experimental studies were the specimens of unprotected wood made from 20-mm-thick pine sapwood with a density of 400‒550 kg/m3. The samples of fireproof wood (of the same variety, thickness, and density) were impregnated with a fire retardant based on diammonium phosphate and ammonium sulfate (at consumption of 168.2 g/m2 of dry fire-retardant components). The modeling employed the results from the experimental determining of the ignition temperature of unprotected and fire-proof wood, specifically: 235 °C – for unprotected wood, 410 °C – for fire-proof wood, respectively.

The results of mathematical modeling and experimental studies confirm the possibility of significant lengthening of time from the onset of fire exposure to the ignition of fire load from wood when nitrogen-phosphorus impregnating agents are used for fire protection.

Procedures of mathematical modeling have been proposed to build models for determining the cooling effect from the use of impregnating fire retardants to protect the wood on the prolongation of the stage of a fire start.

Mathematical modeling data could be applied when making impregnating fire retardants

Author Biographies

Sergii Zhartovskyi, Institute of Public Administration and Research in Civil Protection

Doctor of Technical Sciences

Scientific Testing Center

Olexander Titenko, Institute of Public Administration and Research in Civil Protection

PhD

Scientific Testing Center

Oksana Kyrychenko , Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Protection of Ukraine

Doctor of Technical Sciences, Professor

Department of Fire Prevention Work

Ievgen Tyshchenko, Educational and Methodological Centre of Civil Protection and Life Safety of Cherkasy Region

Doctor of Technical Sciences, Associate Professor, Deputy Head of Educational and Methodological Center

Roman Motrichuk, Department of the Ukrainian SSNU in Cherkassy Region

Adjunct

Valentyn Melnyk, Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Protection of Ukraine

PhD

Department of Fire Prevention Work

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Published

2021-02-23

How to Cite

Zhartovskyi, S., Titenko, O., Kyrychenko , O., Tyshchenko, I., Motrichuk, R., & Melnyk, V. (2021). Procedure for constructing a mathematical model to determine the time of the initial stage of fire evolution . Eastern-European Journal of Enterprise Technologies, 1(10 (109), 45–52. https://doi.org/10.15587/1729-4061.2021.225221

Issue

Vol. 1 No. 10 (109) (2021): Ecology

Section

Ecology

License

Copyright (c) 2021 Сергей Владимирович Жартовский, Александр Николаевич Титенко, Оксана Вячеславовна Кириченко, Евгений Александрович Тищенко, Роман Борисович Мотричук, Валентин Павлович Мельник

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