Abstract
An study has been performed with axisymmetric coflow diffusion flames to investigate the influence of air-side, fuel side dilution and initial preheated temperature on the soot formation in methan/air flames. Soot quantities are determined by using PLII(Planar Laser Induced Incandescence), such a C₂H₂ major species(CH₄, O₂, N₂) and temperature are simulated by chemkin code. The numerical analysis was performed with transport properties and detailed reaction mechanisms in axisymmetric coflow diffusion flames. The study of how flame temperature and N₂ dilution of air and fuel side influence the soot concentrations is focused. Soot concentrations results on PLII show that preheated temperature contributes to an increase in the soot volume fraction, and soot formation is more productive to air side dilution than to fuel side dilution. C₂H₂ concentrations have a similar tendency to soot concentrations.
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