Flame characteristics of alcohol electro-spraying in counter-flow combustor
(2.Key Laboratory of Efficient and Clean Energy Utilization of Guangdong Province, Guangzhou, Guangdong, China 510640)
【Abstract】Studying the flame characteristics of atomized liquid fuel combustion helps to understand the entire combustion process. A new counter-flow combustor based on the technology of electro-spraying was designed. Experiment studies on electro-spraying shape and flame characteristics were carried out using alcohol as fuel. The primary focus is paid on the effects of strain rate and equivalent ratio on flame characteristics at different fuel flow rate, including flame temperature and dimensionless diameter of the flame. The results show that the boundary between atomized core regions and satellite regions of the spray gradually disappears when the alcohol flow rate is increased. The liquid column of spray appears when fuel flow rate reaches 13 mL/h. The flame remains stable when the equivalent ratio is less than 1 but oscillates when the equivalent ratio is more than 1. The dimensionless diameter of the flame decreases with increasing equivalent ratio. As the strain rate increases, the dimensionless diameter of the flame and the temperature decrease.
【Keywords】 gas-liquid flow; fuel; alcohol; electro-spraying; counter-flow flame; spray shape; flame characteristics;
(Translated by SUN Z)
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