Open AccessField modeling of the fire dynamics as an answer to the question about the fire alarm performance
Author(s) -
I. R. Khasanov,
А. В. Карпов,
S. F. Lobova,
Н. В. Петрова
Publication year - 2020
Publication title -
požarovzryvobezopasnostʹ
Language(s) - English
Resource type - Journals
eISSN - 2587-6201
pISSN - 0869-7493
DOI - 10.22227/pvb.2020.29.05.40-50
Subject(s) - alarm , computer science , combustion , smoke , field (mathematics) , manual fire alarm activation , grid , relation (database) , work (physics) , simulation , marine engineering , data mining , engineering , aerospace engineering , mechanical engineering , geology , mathematics , geodesy , chemistry , organic chemistry , pure mathematics , waste management
. The performance of a re alarm needs to be analyzed to answer the question about its compliance with re safety requirements. This type of research is frequently performed in the course of a forensic re investigation. Therefore, it is necessary to identify conditions of re escalation and safe evacuation of people to assess the re alarm performance. Purposes and objectives . The purpose of this work is the numerical study of the impact, produced by mathematical models of combustion, characteristics of re loads and locations of re beds, on re alarm performance. Methods. Fire dynamics was eld modeled to achieve the goal of this research. The analysis of ame propagation was performed with regard for various re bed locations to simulate the re alarm operation. Results and discussion . The fulllment of safe evacuation conditions for cases of irregular arrangement of smoke detectors was analyzed to develop and test the algorithm for the calculation of the evacuation start time. It is shown that the estimated time of re detection depends on combustion models employed (their average or complex level), the size of the computational grid, re load specications and the location of the re bed. Conclusions . It is shown that the results of the eld modeling of re propagation and detection time are inuenced by combustion models used, re load specications and the location of the re bed in relation to smoke detectors. If the re alarm fails to perform its functions and, consequently, safe evacuation conditions are not fullled, it is necessary either to improve the combustion model or to compare the modeling results obtained for actual and standard smoke detector location patterns.