Influence of Atomizing Air-to-Liquid Ratio on Combustion and Emission of Pure Glycerol Swirling Spray Flame
Glycerol is one of the most important by-products in biofuel manufacturing process,with high yield,low price and acceptable calorific value.The refined glycerol can be applied as a supplementary fuel in industry.In this paper,a controllable swirling spray burner is designed.The influence of ALR changes on pure glycerol spray combustion is explored through analysing flame,OH*chemiluminescence signals and flow field information at different ALR conditions.Besides,NO,CO and CO2 concentration in exhaust gas at different ALR conditions is also collected and analysed.The result shows that with the increase of ALR,the recirculation zone of swirling spray flame expands,the area and intensity of OH*chemiluminescence signal at the centre of the flame increase,and the atomization quality of glycerol also improves.As for emission,NO concentration generally increases with the increase of ALR.While equivalence ratio increases,NO concentration first increases,then decreases.CO concentration decreases with the increase of ALR.While equivalence ratio increases,CO concentration first decreases,then increases to a certain extent.The increase of ALR is beneficial for reducing droplet size of the spray,improving droplet evaporation and mixture,and stable combustion of glycerol with low NOx and CO emission within a certain working condition.
pure glycerolatomizing air-to-liquid ratioOH* chemiluminescence signalPIV flow fieldpollutant emission
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NSTL
万方数据
维普
