STUDY OF A NON-PREMIXED METHANE / AIR PILOT FLAME

Principle use of the pilot flame is to control combustion in systems having continuous ignition and maintain main flame by providing heat or chemical species and prevention from cold air. This paper study the numerical simulation of non-premixed methane/air piloted flame comparatively with piloted methane/air flame of Sandia National Laboratories. Two-dimensional (2D) simulation used to study the diffusion of piloted flame and measure temperature, pressure, velocity and mass fraction CH4, O2, CO2 and NO including axial and radial profiles. The results describe the propagation of methane/air combustion in the burner and stoichiometric flame length using axial and radial profiles x/D, the factors influence on the flame: the flux of initial jet, the stoichiometric mixture fraction methane/air and diameter of initial jet, that result the reducing of soot in the reaction zone.