Numerical research on micro diesel spray characteristics under ultra-high injection pressure by Large Eddy Simulation (LES)

2017 ◽  
Vol 64 ◽  
pp. 129-136 ◽  
Author(s):  
Shenghao Yu ◽  
Bifeng Yin ◽  
Hekun Jia ◽  
Jianda Yu
Keyword(s):  
Large Eddy Simulation ◽  
Injection Pressure ◽  
Diesel Spray ◽  
Spray Characteristics ◽  
Eddy Simulation ◽  
High Injection ◽  
High Injection Pressure ◽  
Large Eddy ◽  
Numerical Research

scholarly journals Large-Eddy Simulation Study of Ultra-High Fuel Injection Pressure on Gasoline Sprays

2020 ◽  
Author(s):  
S. Wadekar ◽  
A. Yamaguchi ◽  
M. Oevermann
Keyword(s):  
Large Eddy Simulation ◽  
Droplet Size ◽  
Injection Pressure ◽  
Air Entrainment ◽  
Entrainment Rate ◽  
Eddy Simulation ◽  
High Injection ◽  
Large Eddy ◽  
The Impact ◽  
Injection Pressures

Abstract The development of gasoline spray at ultra-high injection pressures was analyzed using Large-Eddy simulation (LES). Two different nozzle hole geometries, divergent and convergent shape, were considered to inject the fuel at injection pressures ranging from 200 to 1500 bar inside a constant volume spray chamber maintained at atmospheric conditions. The discrete droplet phase was treated using a Lagrangian formulation together with the standard spray sub-models. The numerical results were calibrated by reproducing experimentally observed liquid penetration length and efforts were made to understand the influence of ultra-high injection pressures on the spray development. The calibrated model was then used to investigate the impact of ultra-high injection pressures on mean droplet size and droplet size distribution. In addition, the spray-induced large-scale eddies and entrainment rate were evaluated at different ultra-high injection pressures. Overall, simulation results showed a good agreement with available measurement data. At ultra-high injection pressures mean droplet sizes were significantly reduced and comprised very high velocities. Integral length scales of spray-induced turbulence and air entrainment rate into the spray were larger at higher injection pressure compared to lower ones. Graphic abstract

scholarly journals Large-eddy simulation of tri-fuel ignition: diesel spray-assisted ignition of lean hydrogen–methane–air mixtures

2021 ◽  
pp. 1-24
Author(s):  
Jeevananthan Kannan ◽  
Mahmoud Gadalla ◽  
Bulut Tekgül ◽  
Shervin Karimkashi ◽  
Ossi Kaario ◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
Diesel Spray ◽  
Eddy Simulation ◽  
Large Eddy
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