Laser induced fluorescence investigation on deposited fuel film from spray impingement on viscous film over a solid wall

Chenxi Wang, Yiqiang Pei, Jing Qin, Zhijun Peng, Yi Liu, Kai Xu and Ziwang Ye

Energy, 2021, vol. 231, issue C

Abstract: To quantitatively investigate deposited fuel film characteristics under dry and viscous surface, the laser-induced fluorescence (LIF) method was used in this study. The experiment was done by LIF technique in a laboratory simulation of fuel/lubricant films. Isooctane was used as the surrogate fuel of gasoline and 3-pentanone added as the fluorescent tracer. Viscous oil surface was surrogated by non-fluorescent silicone oil to eliminate the disturbance. The conversion of LIF signal and deposited film mass was followed by a two-dimensional calibration. The experimental results demonstrated that more spray fuel deposited on the pre-existing viscous oil film surface with smaller deposited area because of viscous film buffering and inhibition effects. However, as the injection mass increased, the deposited film characteristics of dry surface deteriorated rapidly, and the difference between dry and viscous film surface was decreased. The deposited film was more sensitive to the impingement angle and silicone oil film thickness than the viscosity and injection pressure. Inclined impingement angle and thin silicone oil film thickness can decrease deposited fuel mass efficiently. High injection pressure also decreased the deposited fuel mass due to better atomization and splash effect. The results also suggested that, during cold starts, the main reason for high soot emission is poor evaporation rather than the interactions between the fuel and walls.

Keywords: Gasoline direct injection engine; Laser-induced fluorescence; Spray impingement; Silicone oil film; Deposited film (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544221011415
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:231:y:2021:i:c:s0360544221011415

DOI: 10.1016/j.energy.2021.120893

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().