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Keywords:

  • n-Decane;
  • premixed combustion;
  • ignition delay time;
  • reduced reaction mechanism;
  • sensitivity analysis

Abstract

The introduction of detailed chemical reaction mechanisms for aviation fuels into complex multidimensional fluid dynamics problems is not practical at the present time. Simplified reaction mechanisms that have been thoroughly evaluated must be developed to address specific issues arising in realistic combustor configurations. A reduced chemical kinetic mechanism features 210 elemental reactions (including 92 reversible reactions and 26 irreversible reactions) and 50 species for the ignition and combustion of n-decane was compiled and validated for a wide range of combustion regimes. Validations were performed using experimental measurements on a premixed flame of Jet-A1, O2 and N2, stabilised at 1 atm on a flat-flame burner, as well as from n-decane shock-tube ignition experiments. Numerical calculations were performed using this reduced mechanism and the detailed mechanism respectively for n-decane surrogate fuel. The calculated values of ignition delay times at pressures of 12, 50 bar and equivalence ratio is 1.0, 2.0, respectively and the main reactants and main products mole fractions agree well with experimental data. The present study shows that this reduced mechanism for the n-decane surrogate can be employed to predict premixed combustion of kerosene. © 2012 Canadian Society for Chemical Engineering