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The role of a split injection strategy in the mixture formation and combustion of diesel spray: A large-eddy simulation

Hadadpour, Ahmad LU ; Jangi, Mehdi LU ; Pang, Kar Mun and Bai, Xue-Song LU (2019) In Proceedings of the Combustion Institute 37(4). p.4709-4716
Abstract
The role of a split injection in the mixture formation and combustion characteristics of a diesel spray in an engine-like condition is investigated. We use large-eddy simulations with finite rate chemistry in order to identify the main controlling mechanism that can potentially improve the mixture quality and reduces the combustion emissions. It is shown that the primary effect of the split injection is the reduction of the mass of the fuel-rich region where soot precursors can form.

Furthermore, we investigate the interaction between different injections and explain the effects of the first injection on the mixing and combustion of the second injection. Results show that the penetration of the second injection is faster than that... (More)
The role of a split injection in the mixture formation and combustion characteristics of a diesel spray in an engine-like condition is investigated. We use large-eddy simulations with finite rate chemistry in order to identify the main controlling mechanism that can potentially improve the mixture quality and reduces the combustion emissions. It is shown that the primary effect of the split injection is the reduction of the mass of the fuel-rich region where soot precursors can form.

Furthermore, we investigate the interaction between different injections and explain the effects of the first injection on the mixing and combustion of the second injection. Results show that the penetration of the second injection is faster than that of the first injection. More importantly, it is shown that the ignition delay time of the second injection is much shorter than that of the first injection. This is due to the residual effects of the ignition of the first injection which increases the local temperature and maintains a certain level of combustion some intermediates or radical which in turn boosts the ignition of the second injection. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Split injection, Jet–jet interaction, Mixture formation, Large-eddy simulation
in
Proceedings of the Combustion Institute
volume
37
issue
4
pages
4709 - 4716
publisher
Elsevier
external identifiers
  • scopus:85055977694
ISSN
1540-7489
DOI
10.1016/j.proci.2018.09.016
language
English
LU publication?
yes
id
4c375204-09c9-43ba-b00e-a7405a37edba
date added to LUP
2018-11-12 18:30:15
date last changed
2019-09-15 05:10:58
@article{4c375204-09c9-43ba-b00e-a7405a37edba,
  abstract     = {The role of a split injection in the mixture formation and combustion characteristics of a diesel spray in an engine-like condition is investigated. We use large-eddy simulations with finite rate chemistry in order to identify the main controlling mechanism that can potentially improve the mixture quality and reduces the combustion emissions. It is shown that the primary effect of the split injection is the reduction of the mass of the fuel-rich region where soot precursors can form.<br/><br/>Furthermore, we investigate the interaction between different injections and explain the effects of the first injection on the mixing and combustion of the second injection. Results show that the penetration of the second injection is faster than that of the first injection. More importantly, it is shown that the ignition delay time of the second injection is much shorter than that of the first injection. This is due to the residual effects of the ignition of the first injection which increases the local temperature and maintains a certain level of combustion some intermediates or radical which in turn boosts the ignition of the second injection.},
  author       = {Hadadpour, Ahmad and Jangi, Mehdi and Pang, Kar Mun and Bai, Xue-Song},
  issn         = {1540-7489},
  keyword      = {Split injection,Jet–jet interaction,Mixture formation,Large-eddy simulation},
  language     = {eng},
  number       = {4},
  pages        = {4709--4716},
  publisher    = {Elsevier},
  series       = {Proceedings of the Combustion Institute},
  title        = {The role of a split injection strategy in the mixture formation and combustion of diesel spray: A large-eddy simulation},
  url          = {http://dx.doi.org/10.1016/j.proci.2018.09.016},
  volume       = {37},
  year         = {2019},
}