Journal Article

Comparative experimental study on macroscopic spray characteristics of various oxygenated diesel fuels

Wang, Qingxin, Di, Liming, Bao, Jianhui, Wang, Haohao, Wang, Ruofei, Shi, Cheng

2023

Overview

Under high ambient pressure (5 MPa) and different injection pressures (90, 120, and 150 MPa), a high‐speed imaging technique was carried out to comparatively investigate the macroscopic spray characteristics of diesel with three different types of blended fuel in a constant volume chamber. The oxygenated fuels were n‐butanol (B), pine oil (P), and 2,5‐dimethylfuran (DMF). All their blending ratio with diesel were 20%. Results showed that less viscosity could be improved the spray characteristics of the fuel in the range of experimental conditions. Then, the tested fuels had a longer penetration and a greater spray area with increasing the injection pressure from 90 to 150 MPa. On the other hand, the percentage increases in the mean spray cone angle of D100, B20, P20, and DMF20 were 3%, 4.4%, 2.4%, and 2.9%, respectively. At the same experimental condition, the spray penetrations of DMF20 and P20 were larger than that of D100, but the spray penetration of B20 was basically similar to D100. Besides, the performance of the spray cone angle and spray area were D100 < B20 < P20 < DMF20. In addition, the comprehensive influence was that blending oxygenated fuels would be a benefit for developing fuel atomization and the air–fuel mixture of conventional diesel fuel. There are only very few efforts focused on macroscopic spray characteristics of various oxygenated diesel fuels and perhaps no investigation simultaneously involved in the n‐butanol, pine oil, 2,5‐dimethylfuran, and diesel blended fuels through experimental measurement with the combined effect of fuel property and injection pressure. With that in mind, the objective of this study is seeking to bridge the gap identified in the literature. The investigation confirmed the benefit of oxygenated fuel addition as a useful means to improve spray development which strengthens the combustion more effectively and rapidly.

• Publisher: John Wiley & Sons, Inc,Wiley
• Subject: 2,5‐dimethylfuran / Atomizing / Blending / Butanol / Cameras / Diesel engines / Diesel fuels / Engines / Fuel mixtures / Fuels / Imaging techniques / Injection / Nitrogen / n‐butanol / oxygenated fuels / Oxygenation / pine oil / Pressure / Semiconductors / Spray characteristics / Visualization