An Experimental Study on the Macroscopic Spray Characteristics of Biodiesel and Diesel in a Constant Volume Chamber

Hongzhan Xie, Lanbo Song, Yizhi Xie, Dong Pi, Chunyu Shao and Qizhao Lin
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Hongzhan Xie: Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China
Lanbo Song: Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China
Yizhi Xie: Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China
Dong Pi: Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China
Chunyu Shao: Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China
Qizhao Lin: Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China

Energies, 2015, vol. 8, issue 6, 1-21

Abstract: The objective of this study was to investigate the macroscopic spray characteristics of different 0%–100% blends of biodiesel derived from drainage oil and diesel (BD0, BD20, BD50, BD80, BD100), such as spray tip penetration, average tip velocity at penetration, spray angle, average spray angle, spray evolution process, spray area and spray volume under different injection pressures (60, 70, 80, 90, 100 MPa) and ambient pressures (0.1, 0.3, 0.5, 0.7, 0.9 MPa) using a common rail system equipped with a constant volume chamber. The characteristic data was extracted from spray images grabbed by a high speed visualization system. The results showed that the ambient pressure and injection pressure had significant effects on the spray characteristics. As the ambient pressure increased, the spray angle increased, while the spray tip penetration and the peak of average tip velocity decreased. As the injection pressure increased, the spray tip penetration, spray angle, spray area and spray volume increased. The increasing blend ratio of biodiesel brought about a shorter spray tip penetration and a smaller spray angle compared with those of diesel. This is due to the comparatively higher viscosity and surface tension of biodiesel, which enhanced the friction effect between fuel and the injector nozzle surface and inhibited the breakup of the liquid jet.

Keywords: biodiesel; diesel; macroscopic spray characteristics; visualization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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