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An experimental study on combustion performance and flame spread characteristics over liquid diesel and ethanol-diesel blended fuel

Zihe Gao, Shenghui Lin, Jie Ji and Mengyuan Li

Energy, 2019, vol. 170, issue C, 349-355

Abstract: Ethanol has gradually become a commonly used additive in diesel to reduce the carbon foot print of the combustion products. In the process of production, transportation and storage, once the accidental leaked ethanol-diesel blend fuel is ignited, the flame will spread very fast and cause great threaten to people's lives and properties, the combustion properties of ethanol-diesel blends is thus a matter of great concern to us. A set of experiments was conducted to study the effects of fuel depth and ullage height on liquid flame spread of diesel and 5% ethanol-diesel. Results showed that as the fuel depth increases under ullage effect, the flame spread rate increases first and then maintain constant. For 5% ethanol-diesel, the flame spread rate decreases monotonously and then tends to be unchanged with ullage height due to the higher combustion efficiency and oxygen content of ethanol-diesel. For deep pools, the surface velocity increases with fuel depth. Moreover, the flash flame pulsation frequency is weakly affected by the fuel depth and presents a negative relationship with ullage height. The study on these issues may have the potential to benefit the current safety production, utilization and management of the energy of ethanol-diesel blends.

Keywords: Energy management; Ethanol-diesel blended fuel; Diesel; Flame spread; Combustion performance (search for similar items in EconPapers)
Date: 2019
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