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Large Eddy Simulation of Air Entrainment and Mixing in Reacting and Non-Reacting Diesel Sprays

Gong, Cheng LU ; Jangi, Mehdi LU ; Lucchini, Tommaso; D'Errico, Gianluca and Bai, Xue-Song LU (2014) In Flow Turbulence and Combustion 93(3). p.385-404
Abstract
Large eddy simulation is performed to investigate air entrainment and mixing in diesel sprays with and without combustion. The Spray A case of the Engine Combustion Network (ECN) is considered in the study, in which liquid n-Dodecane is injected at 1500 bar through a nozzle of 90 mu m into a constant volume vessel with an ambient density of 22.8 kg/m(3) and an ambient temperature of 900 K. Primary and secondary breakup processes of the liquid fuel are taken into account. The gas and liquid phases are modeled using Eulerian/Lagrangian coupling approach. Detailed chemical kinetics for n-Dodecane is employed to simulate the ignition process and the lifted flames. A chemistry coordinate mapping approach is used for speeding up the... (More)
Large eddy simulation is performed to investigate air entrainment and mixing in diesel sprays with and without combustion. The Spray A case of the Engine Combustion Network (ECN) is considered in the study, in which liquid n-Dodecane is injected at 1500 bar through a nozzle of 90 mu m into a constant volume vessel with an ambient density of 22.8 kg/m(3) and an ambient temperature of 900 K. Primary and secondary breakup processes of the liquid fuel are taken into account. The gas and liquid phases are modeled using Eulerian/Lagrangian coupling approach. Detailed chemical kinetics for n-Dodecane is employed to simulate the ignition process and the lifted flames. A chemistry coordinate mapping approach is used for speeding up the calculations. The effect of low temperature ignition (cool flame) on the evaporation process and on the liquid penetration length is analyzed. The effect of combustion heat release from the lifted flames on the vapor spreading in the radial direction and on the vapor transport in the streamwise direction (vapor penetration) is investigated. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Diesel spray, Air entrainment, Diesel combustion, Large eddy simulation
in
Flow Turbulence and Combustion
volume
93
issue
3
pages
385 - 404
publisher
Springer
external identifiers
  • wos:000342455700002
  • scopus:84942303224
ISSN
1573-1987
DOI
10.1007/s10494-014-9566-0
language
English
LU publication?
yes
id
02a54eaf-89cd-49a4-a10d-fbe1909392b8 (old id 4803770)
date added to LUP
2014-11-27 11:02:41
date last changed
2017-08-13 03:12:06
@article{02a54eaf-89cd-49a4-a10d-fbe1909392b8,
  abstract     = {Large eddy simulation is performed to investigate air entrainment and mixing in diesel sprays with and without combustion. The Spray A case of the Engine Combustion Network (ECN) is considered in the study, in which liquid n-Dodecane is injected at 1500 bar through a nozzle of 90 mu m into a constant volume vessel with an ambient density of 22.8 kg/m(3) and an ambient temperature of 900 K. Primary and secondary breakup processes of the liquid fuel are taken into account. The gas and liquid phases are modeled using Eulerian/Lagrangian coupling approach. Detailed chemical kinetics for n-Dodecane is employed to simulate the ignition process and the lifted flames. A chemistry coordinate mapping approach is used for speeding up the calculations. The effect of low temperature ignition (cool flame) on the evaporation process and on the liquid penetration length is analyzed. The effect of combustion heat release from the lifted flames on the vapor spreading in the radial direction and on the vapor transport in the streamwise direction (vapor penetration) is investigated.},
  author       = {Gong, Cheng and Jangi, Mehdi and Lucchini, Tommaso and D'Errico, Gianluca and Bai, Xue-Song},
  issn         = {1573-1987},
  keyword      = {Diesel spray,Air entrainment,Diesel combustion,Large eddy simulation},
  language     = {eng},
  number       = {3},
  pages        = {385--404},
  publisher    = {Springer},
  series       = {Flow Turbulence and Combustion},
  title        = {Large Eddy Simulation of Air Entrainment and Mixing in Reacting and Non-Reacting Diesel Sprays},
  url          = {http://dx.doi.org/10.1007/s10494-014-9566-0},
  volume       = {93},
  year         = {2014},
}