TY - JOUR
T1 - Macroscopic characteristics of flash-boiling spray focused on plume interaction
AU - Liu, Wenchuan
AU - Lu, Yiyu
AU - Kang, Yong
AU - Yan, Junhao
AU - Lee, Chia Fon
N1 - Funding Information:
This research is financially supported by the China National Funds for Distinguished Young Scientists (No. 51625401 ), the China Scholar Council (No. 201706270098 ) and the Program for natural Science Foundation of Chongqing ( cstc2019jcyj-bshX0025 ).
Funding Information:
This research is financially supported by the China National Funds for Distinguished Young Scientists (No. 51625401), the China Scholar Council (No. 201706270098) and the Program for natural Science Foundation of Chongqing (cstc2019jcyj-bshX0025).
Publisher Copyright:
© 2021
PY - 2021/5
Y1 - 2021/5
N2 - In gasoline direct injection (GDI) engines, plume-plume interaction usually occurs when the superheated fluid discharges from multi-hole injectors. To mitigate plume interaction for further utilizing the merits of flash-boiling phenomena, it is essential to obtain the criteria of plume interaction and their effects on flashing spray characteristics. An 8-hole injector from Engine Combustion Network (ECN) is used to obtain the plume interaction criteria. Iso-octane, pentane, hexane, and their blends were tested, and experiments using the method of diffused back illumination (DBI) were conducted in a constant volume chamber (CVC). The new nominal parameter calculated by the pressure-enthalpy graph was introduced to analyze the spray morphologies and macroscopic characteristics. The new criteria considering fuel properties, injector geometries, and ambient pressure were obtained and validated by mono- /multi-component fuels. Based on the new criteria, spray characteristics in various stages of plume interaction are investigated. The tunning point of tip penetration and spray angles occur at the critical point defined by the new criteria in all tested fuels.
AB - In gasoline direct injection (GDI) engines, plume-plume interaction usually occurs when the superheated fluid discharges from multi-hole injectors. To mitigate plume interaction for further utilizing the merits of flash-boiling phenomena, it is essential to obtain the criteria of plume interaction and their effects on flashing spray characteristics. An 8-hole injector from Engine Combustion Network (ECN) is used to obtain the plume interaction criteria. Iso-octane, pentane, hexane, and their blends were tested, and experiments using the method of diffused back illumination (DBI) were conducted in a constant volume chamber (CVC). The new nominal parameter calculated by the pressure-enthalpy graph was introduced to analyze the spray morphologies and macroscopic characteristics. The new criteria considering fuel properties, injector geometries, and ambient pressure were obtained and validated by mono- /multi-component fuels. Based on the new criteria, spray characteristics in various stages of plume interaction are investigated. The tunning point of tip penetration and spray angles occur at the critical point defined by the new criteria in all tested fuels.
KW - Flash-boiling
KW - Macroscopic characteristics
KW - Multi-hole injectors
KW - New criteria
KW - Plume interaction
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U2 - 10.1016/j.ijheatmasstransfer.2021.120999
DO - 10.1016/j.ijheatmasstransfer.2021.120999
M3 - Article
AN - SCOPUS:85100503741
SN - 0017-9310
VL - 170
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
M1 - 120999
ER -