Internal explosion. Pressure peaks

Vyacheslav Gorev,Evgeniya Chelekova,P Akimov,A Doroshenko,A Tusnin,N Vatin

doi:10.1051/e3sconf/202126302041

Vyacheslav Gorev, Evgeniya Chelekova + Show 4 more

Open Access

https://doi.org/10.1051/e3sconf/202126302041

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Abstract

Internal emergency gas explosions occur at threatening intervals and cause significant destruction. The level of destruction indicates the imperfection of protection methods. Documents regulating the use of safety structures for the protection of buildings during an internal explosion are limited by the assignment of the area of openings covered by safety structures, without taking into account the properties of these structures, attachment methods and the rate of pressure increase during an explosion. The purpose of the work is to take into account as much as possible the influence of the properties of the protective structures, their attachment and the nature of the explosion on the dynamics of the explosion pressure change. The second goal is to obtain a methodology for converting the results of experimental results obtained on small volumes to determine the parameters of an explosion in conditions of large volume. The goals are achieved by the theory of dimensions and similarity using numerical modeling. The work revealed dimensionless complexes describing pressure dynamics both during opening of openings and at the moment of maximum power of energy release during explosion. Possibility of experimental scale modeling of processes of opening of safety structures is shown. In particular, it is shown that during an explosion in premises of a small volume (residential), the pressure during opening is more often critical.

Highlights

Emergency gas explosions in residential and industrial buildings occur regularly
If we talk about construction measures to protect against internal explosions, they are reduced to volumetric planning solutions that should ensure the stability of the object as a whole in case of local losses of load capacity due to an explosion and the use of safety structures, the purpose of which is to reduce explosive loads to an acceptable level during an explosion
Acceptable level of loads is determined by permissible value of risk of various damages and calculation of load-bearing capacity of building structures under action of explosive dynamic loads

Summary

Introduction

Emergency gas explosions in residential and industrial buildings occur regularly. This indicates a lack of preventive events.The devastating effects of these explosions indicate the poor effectiveness of existing measures to protect construction facilities. Emergency gas explosions in residential and industrial buildings occur regularly. This indicates a lack of preventive events. If we talk about construction measures to protect against internal explosions, they are reduced to volumetric planning solutions that should ensure the stability of the object as a whole in case of local losses of load capacity due to an explosion and the use of safety structures, the purpose of which is to reduce explosive loads to an acceptable level during an explosion. The most effective use of safety structures for these purposes in quasi-stationary explosions. These explosions are characterized by the absence of wave effects and a negligible pressure gradient in the volume. You can consider the pressure to be the same at all points in the volume at every moment in time

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