Improved safety in promotion of accident by simulation of fire gas mixture

Authors

  • A. S. Belikov State Higher Education Establishment «Pridneprovsk State Academy of Civil Engineering and Architecture», 24-A, Chernishevskogo st., Dnipropetrovsk 49600, Ukraine, Ukraine https://orcid.org/0000-0001-5822-9682
  • N. N. Nalisko State Higher Education Establishment «Pridneprovsk State Academy of Civil Engineering and Architecture», 24-A, Chernishevskogo st., Dnipropetrovsk 49600, Ukraine, Ukraine
  • I. G. Maladyika Cherkassy Institute of Fire Safety named after Chernobyl Heroes of the National University of Civil Defence of Ukraine, ul. Onopriyenko, 8, 18034, Cherkassy, Ukraine, Ukraine https://orcid.org/0000-0001-8784-2814
  • S. Yu. Rahimov National University of Civil Defence of Ukraine, st. Chernyshevsky 94, Kharkiv, 61023, Ukraine, Ukraine https://orcid.org/0000-0003-0572-4465

Keywords:

gas-air mixture, ignition criteria, the Arrhenius equation, the combustion kinetics, ignition temperature

Abstract

Purpose. Validation of the numerical model of the shock tube in predicting the development of an emergency gas emissions by assessing the reliability of compliance with established criteria for the initiation of a gas explosion. Method. Analysis and synthesis of theoretical studies, numerical modeling of gas-dynamic process, the ignition gas mixture. Results. Completed setting ignition problem-gas mixture from the bulk source having a different nature: solid, heated gas, gas flare in a small volume. Defined boundary conditions for a spherical source of ignition. Decisions task performed by a numerical method of "large particles method," in which the Arrhenius equation was used for the simulation of combustion processes. The result is a dynamic picture of the process of the ignition gas mixture for various conditions: the temperature and the ignition source size, percentage and type of combustible gas, the content of the oxidant (oxygen) in the gas mixture. The convergence of a numerical method with the results of the analytical solution. Scientific novelty. The numerical solution of gas-air mixture ignition in the shock tube model matemeticheskoy modified method of "large particles method". The dynamics of the process of ignition of gas-air mixture in the shock tube. An assessment of the reliabil-ity of the mathematical model of the shock tube in comparison with the analytical solution. The analytical solution is obtained on the basis of the theory of thermal ignition and static approach by the integral balance. Practical meaningfulness. The resulting solution makes it possible to analyze the accuracy of the computing process methods of numerical simulation of gasdynamic parameters of shock waves in the air of the initiation of combustion and explosion of gas-air mixtures. The analysis of the accuracy of the computational process allows the use of numerical methods in practical calculations of finding a safe distance from the centers of the explosion in the liquidation or predicting the consequences of accidents.

Author Biographies

A. S. Belikov, State Higher Education Establishment «Pridneprovsk State Academy of Civil Engineering and Architecture», 24-A, Chernishevskogo st., Dnipropetrovsk 49600, Ukraine

Dr. Sc. (Tech.), Prof., Department of Life Safety

N. N. Nalisko, State Higher Education Establishment «Pridneprovsk State Academy of Civil Engineering and Architecture», 24-A, Chernishevskogo st., Dnipropetrovsk 49600, Ukraine

Cand. Sci. (Tech.), Assoc. Prof, Department of Life Safety

I. G. Maladyika, Cherkassy Institute of Fire Safety named after Chernobyl Heroes of the National University of Civil Defence of Ukraine, ul. Onopriyenko, 8, 18034, Cherkassy, Ukraine

к.т.н., доц., The firefighting tactics and recscue operations department

S. Yu. Rahimov, National University of Civil Defence of Ukraine, st. Chernyshevsky 94, Kharkiv, 61023, Ukraine

Cand. Sc. (Tech.), Assoc. Prof., Department of Organization and technical support rescue operations

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Published

2016-10-20

Issue

Section

Life Safety