Investigation of Nitromethane Combustion Using Laser Induced Fluorescence

Sammanfattning: Pre-mixed nitromethane/air/nitrogen flames on a heat-flux burner are investigated at atmospheric pressure with equivalence ratios of =0.8 and =1.2. Flame thermometry and chemiluminescence spectrum were used to characterise the flame before carrying out saturated laser induced fluorescence on NO molecules. The temperature profile revealed three zones of nitromethane combustion with maximum temperature of 1400K for the lean and 1350K for the rich flame. The chemiluminescence spectrum showed that numerous radicals were produced and NO2 was responsible for the flame yellow appearance especially in the lean case. TheNOconcentration profiles showed good agreement with global chemical equation calculations and previous studies despite some differences. The results indicated that nitrogen and NO are the main nitrogenous products of nitromethane combustion. The results will be used to validate chemical kinetic models of nitromethane combustion.