Pecilarities of the physical picture of the crash explosions development in isolated rooms

Abstract

PURPOSE. The study is devoted to the process of forming explosive loads in emergencies related to air-gas mixtures crash explosion in simply connected areas of residential buildings equipped with gas appliances. METHODS. The author has analyzed the current situation related to household gas explosions in residential gasified apartment buildings across the territory of the Russian Federation, and also carried out an experimental study of the dynamics of an internal deflagration explosion in a simply connected room. FINDINGS. The conducted experimental studies have shown the sufficient complexity of the combustion process occurring during real crash explosions in semi-enclosed areas (kitchens of residential buildings) as well as the importance of choosing structural parameters (glazing) to reduce the pressure index to an acceptable level. RESEARCH APPLICATION FIELD. The outcomes may be used in determining the optimal parameters of structures designed to reduce the consequences of an explosion. CONCLUSIONS. The outcomes of the experimental data obtained by simulating an internal explosion in a model chamber fully correspond to the real scenario of the explosive loads formation. The pressure peak during the explosion corresponds to the maximum area of the combustion front, comparable to the internal area of the room; when opening window areas, the explosion energy goes beyond the internal housing capacity, which helps reduce the pressure value. For a more accurate prediction of the consequences and possible proposals for reducing explosive loads level, further work is needed in this area, aimed at reproducing and implementing an internal explosion in adjacent rooms.