题目：Characteristics of Impinging Spray and Adhesion Formation under Non-Evaporation and Evaporation Conditions

时间：2019年9月30日 9:30-11:00

地点：必赢线路检测中心 F303会议室

邀请人：朱磊 副研究员（内燃机研究所）

Biography

Hongliang Luo, is an assistant professor in Hiroshima University. He got the Doctor
degree of engineering from Hiroshima university in 2018, and then worked there as a special researcher. From April of 2019, he became the assistant professor. Prof. Luo was the scholarship owner of Japanese Ministry of Education, and KAUST (King Abdullah University of Science and Technology) fellowships. His research focuses on impinging spray and fuel adhesion formation. He is a reviewer for several international journals, such as FUEL, SAE International Journal of Engines. He have published more than 20 articles.

Abstract

Spray-wall impingement is a widespread phenomenon applied in many fields, including spray-wall cooling process, spray coating process and fuel spray atomization in internal combustion engines. Although the spray impingement has been investigated for decades, the mechanisms of the interaction between spray and wall are still far from being fully understood. The novelty of this study lies in the correlation between the impinging spray and fuel adhesion formation together to better understand the spray-wall impingement. The refractive index matching (RIM) method was applied to visualize the adhered fuel on the wall under non-evaporation and evaporation conditions by considering the effects of different injection pressures, ambient pressures, and ambient temperatures in experiments. Furthermore, the microscopic characteristics of impinging spray were investigated using particle image analysis (PIA). The droplet size and number were compared before and after impingement. Moreover, the relationship between droplets behaviors and fuel adhesion on the wall was discussed under the same conditions. Additionally, the spray-wall impingement model and droplet breakup/ coalescence model were discussed deeply as well.