Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Numerical Calculation of Minimum Ignition Energy for Hydrogen and Methane Fuels

  • Kim, Hong-Jip (Korea Aerospace Research Institute) ;
  • Chung, Suk-Ho (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Sohn, Chae-Hoon (Department of Aerospace Engineering, Chosun University)
  • Published : 2004.05.01
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Abstract

Minimum ignition energies of hydrogen/air and methane/air mixtures have been investigated numerically by solving unsteady one-dimensional conservation equations with detailed chemical kinetic mechanisms. Initial kernel size needed for numerical calculation is a sensitive function of initial pressure of a mixture and should be estimated properly to obtain quantitative agreement with experimental results. A simple macroscopic model to determine minimum ignition energy has been proposed, where the initial kernel size is correlated with the quenching distance of a mixture and evaluated from the quenching distance determined from experiment. The simulation predicts minimum ignition energies of two sample mixtures successfully which are in a good agreement with the experimental data for the ranges of pressure and equivalence ratio.

Keywords

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