STABILITY OF A LAMINAR JET DIFFUSION FLAME OF METHANE IN AN OXYGEN ENRICHED AIR CO-JET.

The effect of adding oxygen in the combustion of a laminar flame methane/air is studied. The volume content of oxygen obtained varies between 21% (air) and 30%. The results relate to the heights of dropping flame based on initial rates of CH4, air and oxygen percentages. Stability diagrams showing the states of the flame and transitions between these states are built. The reduction drop observed during the addition of oxygen is explained by the increase in laminar flame speed and increased heat release due to a higher flame temperature.