Specific Aspects of Modeling Gas Mixture Explosions in the Atmosphere

Fire

article

Alexander Komarov¹  Dmitry Korolchenko¹  Nikolay Gromov¹  Anton Korolchenko¹  Mostafa Jafari¹  Marina Gravit² 

[1]Department of Integrated Safety in Civil Engineering, Moscow State University of Civil Engineering

[2]Civil Engineering Institute, Peter the Great St. Petersburg Polytechnic University

关键词: accidental deflagration explosion;    physical and mathematical modeling;    blast loads;    spectrum;    combustible mixture;   

DOI  :  10.3390/fire6050201

学科分类：环境科学（综合）

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY