Research into non-stationary temperature field in the protected metallic structure under conditions of fire

Authors

DOI:

https://doi.org/10.15587/1729-4061.2017.112370

Keywords:

stationary temperature field, metallic structure, convection heat exchange, flame-retardant coating, fire-retardant efficiency of coating

Abstract

We tackled a problem of research into temperature field that makes it possible to determine effectiveness of the fire-retardant coating applied onto metallic wall. When stating the problem, we took into account a nonstandard temperature regime and conditions for a non-ideal thermal contact on the conjugating surfaces "metallic wall ‒ flame-retardant coating". To solve a nonstationary heat conduction problem, the integral Laplace transform by time was employed.

By using the devised mathematical model, we determined a non-stationary temperature field in the examined structure under condition of a non-ideal thermal contact. In the process of research, the time needed to reach a critical temperature was calculated, which is 45 minutes under condition that the value of the critical temperature on the unheated surface is 480 °C. Comparison of experimental data with the obtained numerical results showed that the difference is 9.7 %.

The devised adequate and experimentally confirmed mathematical model makes it possible to determine effectiveness of a fire-retardant coating without conducting expensive experimental studies. In future, based on the results obtained, it is necessary to find new formulations for the fire-retardant coating that would enable increasing the time needed to reach the critical temperature for the structure "metallic wall ‒ flame-retardant coating".

Author Biographies

Vasyl Loik, Lviv State University of Life Safety Kleparivska str., 35, Lviv, Ukraine, 79007

PhD

Department of Fire Tactic and Rescue Works 

Oleksandr Lazarenko, Lviv State University of Life Safety Kleparivska str., 35, Lviv, Ukraine, 79007

PhD

Department of Fire Tactic and Rescue Works 

Taras Bojko, Lviv State University of Life Safety Kleparivska str., 35, Lviv, Ukraine, 79007

PhD, Deputy Head of Institute

Educational and scientific institute of fire and technogenic safety

Sergiy Vovk, Lviv State University of Life Safety Kleparivska str., 35, Lviv, Ukraine, 79007

PhD

Department of Supervision and Preventive Work 

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Published

2017-10-30

How to Cite

Loik, V., Lazarenko, O., Bojko, T., & Vovk, S. (2017). Research into non-stationary temperature field in the protected metallic structure under conditions of fire. Eastern-European Journal of Enterprise Technologies, 5(5 (89), 11–20. https://doi.org/10.15587/1729-4061.2017.112370

Issue

Vol. 5 No. 5 (89) (2017): APPLIED PHYSICS

Section

Applied physics

License

Copyright (c) 2017 Vasyl Loik, Oleksandr Lazarenko, Taras Bojko, Sergiy Vovk

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