Effect of in-cylinder environment on spray characteristics of diesel and biodiesel

<p>Wei Fu, Fengyu Li, Kesheng Meng, Yanju Liu, Weidong Shi and Qizhao Lin</p>

Effect of in-cylinder environment on spray characteristics of diesel and biodiesel

Wei Fu, Fengyu Li, Kesheng Meng, Yanju Liu, Weidong Shi and Qizhao Lin

Chinese University of Science and Technology of China, China

: Expert Opin Environ Biol

Abstract

The objective of this paper is to investigate the spray characteristics of diesel and biodiesel in different in-cylinder environments, including spray tip penetration, spray cone angle, projected spray area, and spray tip velocity. The in-cylinder environment was set to two different ambient pressures and five temperature gradients. The results showed that both ambient pressure and temperature had a significant effect on the spray characteristics of diesel and biodiesel. Higher ambient temperatures under nonevaporating conditions increased the spray tip penetration and projected spray area of the fuel. Biodiesel in the same in-cylinder environment exhibited different spray characteristics due to different physical properties compared to diesel. In addition, the initial breakup mechanism of the spray was analyzed using dimensionless numbers.