Conditions of occurrence of fire in the room with a gas explosion. Experimental data

Поландов, Ю. Х.; Korolchenko, D. A.; Evich, A.A.

doi:10.18322/pvb.2020.29.01.9-21

Cited by 11 publications

(3 citation statements)

References 13 publications

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“…However, the maximum value of the blast pressure in Experiment 1 is higher than in Experiment 2 (see Figures 12 and 17). The maximum blast pressure in Experiment 1 is 0.0522 kPa, whereas in Experiment 2, it reaches 0.0163 kPa, which is 3.2 times higher [21].…”

Section: Discussion Of Experiments Resultsmentioning

confidence: 73%

“…Considering the introduced adjustment, the calculated value of the maximum blast pressure at the distance of R = 1 m constituted ΔPMAX = 0.3169 kPa, whereas the minimum blast pressure comprised ΔPMIN = −0.1923 kPa. The wave motions registered during experiments and accompanying the compression and negative waves following a deflagration explosion appear due to the presence of walls in the laboratory where the tests were held [9,21].…”

Section: Discussion Of Experiments Resultsmentioning

confidence: 99%

“…Further, analysis of the experimental data obtained allowed us to clarify several aspects of the explosive combustion of atmospheric gas-air clouds. Notably, the pattern of The wave motions registered during experiments and accompanying the compression and negative waves following a deflagration explosion appear due to the presence of walls in the laboratory where the tests were held [9,21].…”

Section: Discussionmentioning

confidence: 99%

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Specific Aspects of Modeling Gas Mixture Explosions in the Atmosphere

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et al. 2023

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Aspects of mathematical and physical modeling of deflagration explosions emerging during atmospheric (outdoor) accidental explosions are addressed. It has been demonstrated that when physically modeling accidental deflagration explosions, a stoichiometric mixture in the shape of a sphere or hemisphere supported by the ground should be used. This allows us to research the parameters of blast loads for the worst-case accidental scenarios or address the accident using the most conservative approach. A technique has been provided allowing one to create a mixture of a given blend composition in the shape of a sphere or hemisphere supported by the ground in outdoor conditions. It has been demonstrated that there is an ability to conduct modeling studies of accidental atmospheric explosions. We have provided examples of modeling studies of accidental atmospheric explosions; a methodology for analyzing experimental results has also been reviewed. The article discusses the mathematical modeling of outdoor (unobstructed) accidental deflagration explosions. It has been demonstrated that it is most reasonable to base computational experiments on linearized (acoustic) equations of continuum motion, as the visible flame propagation rate emerging during explosive combustion is small (compared to the speed of sound). There has been a satisfactory agreement between the numerical analysis and the experimental data.

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Section: Discussion Of Experiments Resultsmentioning

confidence: 73%

Section: Discussion Of Experiments Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Specific Aspects of Modeling Gas Mixture Explosions in the Atmosphere

Комаров

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et al. 2023

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Processing of experimental data describing internal deflagration explosions

Komarov,

Azamov

2023

E3S Web of Conf.

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This article is devoted to issues related to experimental studies of internal deflagration explosions or emergency explosions occurring inside buildings and premises. In internal emergency explosions, the main role in reducing the explosive pressure to a safe level is played by discharge openings blocked by safety structures (SS). As discharge openings, windows are often used, covered with glazed window blocks, or opened explosion venting structures (EVS). The article deals with processing experimental data obtained in the study of deflagration explosions occurring inside buildings and premises. The main features and difficulties that arise while analyzing experimental materials are described. The article considers the general methodology for processing experimental data to study deflagration explosions inside buildings and premises. Examples of processing materials from experiments performed in chambers equipped with a transparent edge allow high-speed filming of the explosive combustion process inside the chamber. The article presents a technique that allows, based on data processing on the overpressure in the explosion chamber, to obtain complete characteristics of the loads that occur in the experimental chamber during an internal deflagration explosion. The proposed technique makes it possible to abandon the transparent edge of the explosion chamber and obtain data on the explosion process based on the numerical processing of the excess pressure created in the explosion chamber. An example of processing a full-scale experiment to determine the effectiveness of a real explosion venting structure (EVS) is given.

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Polyspast -personal fall protection equipment. Features of certification and certification tests

Zherdev

Korolchenko

Gadzhiyev

2021

IOP Conf. Ser.: Mater. Sci. Eng.

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In the paper there was considered polyspast system as a means of personal protective equipment against falling from height. The structural place of these products in the classification of protective equipment, their functional purpose in ensuring the safety of work at height is analysed. The issue of statistics of accidents at work at height is touched upon. The relevance of the issue of continuous work on safety in this sector of work is shown. There are similarities in the need for safety and rescue operations in both the sports and industrial sectors. The purpose of this work is to form competent recommendations on various aspects of certification and certification tests of polyspasts to improve the safety of users, athletes (including children) and rescuers when performing various tasks and work at height. Within the framework of this work, the procedures for forming technical requirements for certified products, the totality of interaction of the main technical requirements of the technical regulations with the lists of standards specified in the Appendix to the technical regulations are considered. The analysis of two examples of polyspasts, certified in the market of the Eurasian Customs Union. The weak points of their certification due to the problems of the normative and technical state of the main documents in this area are shown. The conclusions provide a brief analysis of the problems of certification and certification testing of polyspast systems. Recommendations of both structural and local nature are formulated to improve the safety of certified products.

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Conditions of occurrence of fire in the room with a gas explosion. Experimental data

Cited by 11 publications

References 13 publications

Specific Aspects of Modeling Gas Mixture Explosions in the Atmosphere

Specific Aspects of Modeling Gas Mixture Explosions in the Atmosphere

Processing of experimental data describing internal deflagration explosions

Polyspast -personal fall protection equipment. Features of certification and certification tests

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