Effect of spray characteristics on combustion process under flash boiling and non-flash boiling test conditions 2020-01-0288
Flash boiling could enhance the liquid fuel jet break-up and spray atomization process and spray atomization efficiency plays a vital role in the combustion process. Even though a number of researches proven that flash boiling has the potential to improve combustion efficiency and optimize emission-related issues. The effect of flash boiling spray characteristics on combustion process has not been fully investigated yet. In this paper, different spray characteristics and related combustion process were studied via different non-intrusive diagnostics methods. Backlit imaging, planar laser Mie scattering and phase Doppler interferometry were used to study the spray geometry, pattern and droplet size distribution. The combustion process was studied via an optical engine. Test measurement results established the relationship between spray characteristics and combustion performance. It was seen that flash boiling sprays have generally improved the combustion performance, both in the aspect of IMEP and PN emission because of better spray atomization efficiency.
Bowei Yao, Hongchang Xu, Sen Wang, Zhiyuan Yuan, Xuesong Li, Sun Jin