The Theory of a Local Ignition

  • Nickolai M. Rubtsov
  • Boris S. Seplyarskii
  • Michail I. Alymov
Chapter
Part of the Heat and Mass Transfer book series (HMT)

Abstract

It is shown that the problem on a local ignition comes down to the analysis of the dynamics of a reaction zone under condition of cooling of the ignition center with the inert environment; at the same time the power of a chemical heat source during the induction period can be considered approximately constant. The approximate analytical method is applied for analysis of the problem on a local chain-thermal explosion in the reaction of hydrogen oxidation in the presence of chemically active additive. The concept of an intermediate combustion wave with the maximum temperature equal to the initial temperature of the hot spot is introduced. It is shown that key parameters defining the critical size of a local source of ignition, are the temperature in the center of a local ignition zone, the quantity of the active centers of combustion created with the local source, and presence of active chemical additives in a combustible gaseous mixture. Comparison to experimental data has shown the applicability of the developed approach for the analysis of critical conditions of a local ignition in combustible gas mixtures.

Keywords

Local ignition center Critical size Hot spot Adiabatic induction period Heat losses Thermal explosion Approximate analytical Numerical calculations 

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Nickolai M. Rubtsov
    • 1
  • Boris S. Seplyarskii
    • 1
  • Michail I. Alymov
    • 1
  1. 1.Institute of Structural Macrokinetics and Materials ScienceRussian Academy of SciencesMoscowRussia

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