Nitrogen Dilution and Extinction Effects for Methane Impinging Diffusion Flame

In this study we focus an experimental investigation on the effect of the dilution rate on the extinction of a methane diffusion impinging flame. Using infrared thermography camera to show the flame flow structure and to analysis the flow wall interacting behavior, with the variation of the nitrogen added rate to the methane jet flame by 0.2N2, 0.4N2, 0.6N2, 0.8N2. Flame temperature fluctuation was shown a turbulent behavior of the flame and the extinction is more dependent on the flame approaching to the impinging wall and with the increase of the dilution rate, more dilution that is short time to extinction limit.