Transition of Combustion to Explosion and Decision Support Systems for Explosion Protection

Волков, В. Э.; Kryvchenko, Yuri

doi:10.1007/978-3-030-54215-3_28

Cited by 2 publications

(18 citation statements)

References 22 publications

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“…The starting point for constructing physical and mathematical model of the combustion-to-explosion transition is the assumption that the main reason for this transition is the hydrodynamic instability of the laminar flame [5,16], [23].…”

Section: Mathematical Modeling Of Combustion-to-explosion Transitionmentioning

confidence: 99%

“…1. There is possibility of the laminar flame instability [5,12], [16,23]. If there is no such possibility, that is the laminar flame is stable, then there is no possibility for the flame acceleration, and so there are no possibilities for deflagration explosions or detonations.…”

Section: Mathematical Modeling Of Combustion-to-explosion Transitionmentioning

confidence: 99%

“…In the case of a flat channel, the boundary condition of the impermeability of its walls imposes an additional condition on the perturbations, namely: an integer number of half-wavelengths must fit along the diameter of the channel [5]. Assessment of the stability of combustion is carried out as a result of solving the problem of eigenvalues.…”

Section: Mathematical Modeling Of Combustion-to-explosion Transitionmentioning

confidence: 99%

“…First, it should be taken into account that the possibility of an explosion in the event of a fire may be great [1,4], [5] in spite of the relatively low probability of ignition. This is especially true for coal mines [6,7], [8] and for those enterprises, where explosive dust-air mixtures are formed during the technological process [4,9].…”

Section: Introductionmentioning

confidence: 99%

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Mathematical and information models of decision support systems for explosion protection

Volkov¹

2022

AAIT

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This paper is dedicated to the issue of mathematical and information modeling of the combustion-to-explosion transition that makes it possible to create an adequate mathematical and information support for decision support systems (DSS) for automatedcontrol of explosive objects.A simple mathematical model for the transition of combustion to explosion is constructed. This model is based on solving mathematical problems of the hydrodynamic stability of flames and detonation waves. These problems are reduced to solving eigenvalue problems for linearized differential equations of gas dynamics. Mathematical model is universal enough. It provides opportunities for making simple analytical estimates for the explosive induction distance and the time of the shock wave formation. The possibilities of the transition of slow combustion to both a deflagration explosion and a detonation wave are considered. Theoretical estimates of the explosive induction distance and the time of the combustion-to-explosion transition are obtained. These estimates are expressed by algebraic a formula, the use of which save computer resources and does not require significant computer time. The application of fuzzy logic makes it possible to use the proposed mathematical model of the combustion-to-explosion transition for real potentially explosive objects in industry and transport.Mathematical models of potentially explosive objects are based on combination of the fuzzy logic and classical mathematical methods. These models give possibilities for creating corresponding information models. Thus mathematical and information support of DSS for automated control systems of explosive objects is developed. The main advantage of these DSS is that it makes it possible for decision makers to do without experts. In particular, developed mathematical and information models create the base forsoftware of DSS for explosion safety of grain elevators. Appropriate software is developed and some calculations are performed. These calculations are useful not only from the point of view of testing the proposed method of mathematical modeling of a grain elevator as a potentially explosive object or testing the software itself, but also from the point of view of the grain elevator designing.

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Section: Mathematical Modeling Of Combustion-to-explosion Transitionmentioning

confidence: 99%

Section: Mathematical Modeling Of Combustion-to-explosion Transitionmentioning

confidence: 99%

Section: Mathematical Modeling Of Combustion-to-explosion Transitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mathematical and information models of decision support systems for explosion protection

Volkov¹

2022

AAIT

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“…Three consequently emerging events appear to constitute the required conditions for an indoor gas explosion: a gas leak from the gas supply system, a gas accumulation up to an explosive concentration, or introduction of an ignition source in a gassy room [9][10][11][12][13][14][15][16][17]. A gas leak may generally occur within two scenarios: (a) an emission of a significant amount of gas within a short period of time as a result, for instance, of an emergency depressurization of the supply gas pipe; (b) a slow (with low gas flow) accumulation of gas inside a room from, for example, an unlit or flamed-out burner of a gas cooker [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Specifics of Explosion-Venting Structures Providing Acceptable Indoor Explosion Loads

et al. 2021

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This article experimentally and theoretically demonstrates that the presence of blast-relief openings (windows) equipped with explosion-venting structures (EVS) allows explosive pressure to be reduced to a safe level (2–4 kPa). We provide results of model and full-scale experiments aimed at studying the influence of EVS parameters of blast-relief openings in explosion-hazardous buildings on the intensity of explosive loads. It was demonstrated that the maximum explosive-pressure value inside EVS-equipped buildings depends on the EVS start-to-open pressure, the structure’s response rate (lag), and characteristic dimension of the premises. Thus, each particular building requires individual selection of EVS parameters, which provide a safe level of excessive pressure in case of an explosive accident. This aspect, however, prevents the widespread use of EVS at explosion-hazardous sites. This article offers an modest upgrade of the explosion-venting structure that provides an indoor pressure equal to the EVS start-to-open pressure. The suggested innovation excludes the possibility of a significant increase in explosive pressure due to an EVS response delay. The efficiency of the suggested technical upgrade was proven by numerical experiments and indirectly by experimental studies aimed at exploring the physical processes associated with the opening of EVSs after an explosion accident. The use of upgraded EVSs will allow for provision of a known maximum level of the explosion load should an explosion event occur in an EVS-equipped room.

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Transition of Combustion to Explosion and Decision Support Systems for Explosion Protection

Cited by 2 publications

References 22 publications

Mathematical and information models of decision support systems for explosion protection

Mathematical and information models of decision support systems for explosion protection

Specifics of Explosion-Venting Structures Providing Acceptable Indoor Explosion Loads

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