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Title: IMAGING RESEARCH FOR THE FORMATION OF EXPLOSIVE ATMOSPHERES
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IMAGING RESEARCH FOR THE FORMATION OF EXPLOSIVE ATMOSPHERES
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1314-2704
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English
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21
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1.1
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• Prof. DSc. Oleksandr Trofymchuk, UKRAINE
• Prof. Dr. hab. oec. Baiba Rivza, LATVIA |
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In the investigation of gas explosion events resulting from combustible gas leakage, often the formation of the explosive atmosphere at the location of the ignition source is less highlighted, usually being calculated the concentration of combustible gases at the entire volume affected by the explosion; depending on the distance between the gas source and the ignition, the complexity of the geometry (volumes occupied by various solid bodies) and the air currents in that volume (convective currents generated by heat sources, air currents formed between two space openings, etc.), the concentrations of combustible gases may differ locally, reaching the explosive range. To study this phenomenon, a transparent, semi-closed stand was made, in which controlled amounts of methane gas were introduced together with very small mass particles. The diffusion of methane carrying particles was recorded by PIV (Particle Image Velocimetry) techniques. The principle underlying these techniques is the position comparison of the suspended solid particle, located in a transparent and homogeneous fluid environment, a comparison made between two staggered images, with a known time frame. The results of the high-speed camera recordings are then transferred to the Insight 4G application, through which the vector fields of velocities, turbulences and the behaviour of the explosive gas cloud can be highlighted, until the explosive conditions at the location of the initiation source are met. The process of mixing fuel gases with air has usually been explained by the application of diffusion formulas and / or by the calculation of hazardous gas concentrations from accidental leaks or releases. In this context, by visualizing in real time the process of mixing a combustible gas with air, a new field of study is born that can bring a surplus of knowledge in combating explosion events and the development of appropriate protection measures.
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conference
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21st International Multidisciplinary Scientific GeoConference SGEM 2021
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21st International Multidisciplinary Scientific GeoConference SGEM 2021, 16 - 22 August, 2021
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Proceedings Paper
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STEF92 Technology
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SGEM International Multidisciplinary Scientific GeoConference
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SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci & Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts & Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci
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635-642
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16 - 22 August, 2021
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website
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cdrom
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7844
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PIV; gas leaks; explosive atmosphere; hazardous
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