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Numerical Modeling of Chemical Kinetics, Spray Dynamics, and Turbulent Combustion towards Sustainable Aviation

Åkerblom, Arvid LU ; Passad, Martin LU ; Ercole, Alessandro LU ; Zettervall, Niklas LU ; Nilsson, Elna J.K. LU orcid and Fureby, Christer LU (2024) In Aerospace 11(1).
Abstract

With growing interest in sustainable civil supersonic and hypersonic aviation, there is a need to model the combustion of alternative, sustainable jet fuels. This work presents numerical simulations of several related phenomena, including laminar flames, ignition, and spray flames. Two conventional jet fuels, Jet A and JP-5, and two alternative jet fuels, C1 and C5, are targeted. The laminar burning velocities of these fuels are predicted using skeletal and detailed reaction mechanisms. The ignition delay times are predicted in the context of dual-mode ramjet engines. Large Eddy Simulations (LES) of spray combustion in an aeroengine are carried out to investigate how the different thermodynamic and chemical properties of alternative... (More)

With growing interest in sustainable civil supersonic and hypersonic aviation, there is a need to model the combustion of alternative, sustainable jet fuels. This work presents numerical simulations of several related phenomena, including laminar flames, ignition, and spray flames. Two conventional jet fuels, Jet A and JP-5, and two alternative jet fuels, C1 and C5, are targeted. The laminar burning velocities of these fuels are predicted using skeletal and detailed reaction mechanisms. The ignition delay times are predicted in the context of dual-mode ramjet engines. Large Eddy Simulations (LES) of spray combustion in an aeroengine are carried out to investigate how the different thermodynamic and chemical properties of alternative fuels lead to different emergent behavior. A novel set of thermodynamic correlations are developed for the spray model. The laminar burning velocity predictions are normalized by heat of combustion to reveal a more distinct fuel trend, with C1 burning slowest and C5 fastest. The ignition results highlight the contributions of the Negative Temperature Coefficient (NTC) effect, equivalence ratio, and hydrogen enrichment in determining ignition time scales in dual-mode ramjet engines. The spray results reveal that the volatile alternative jet fuels have short penetration depths and that the flame of the most chemically divergent fuel (C1) stabilizes relatively close to the spray.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
chemical kinetics, combustion, jet engines, LES, numerical simulations, spray, supersonic, sustainable aviation fuel, turbulence
in
Aerospace
volume
11
issue
1
article number
31
publisher
MDPI AG
external identifiers
  • scopus:85183422514
ISSN
2226-4310
DOI
10.3390/aerospace11010031
language
English
LU publication?
yes
id
75d45b7e-1135-45fe-ae7d-72655986600b
date added to LUP
2024-02-23 11:46:11
date last changed
2024-02-23 11:47:07
@article{75d45b7e-1135-45fe-ae7d-72655986600b,
  abstract     = {{<p>With growing interest in sustainable civil supersonic and hypersonic aviation, there is a need to model the combustion of alternative, sustainable jet fuels. This work presents numerical simulations of several related phenomena, including laminar flames, ignition, and spray flames. Two conventional jet fuels, Jet A and JP-5, and two alternative jet fuels, C1 and C5, are targeted. The laminar burning velocities of these fuels are predicted using skeletal and detailed reaction mechanisms. The ignition delay times are predicted in the context of dual-mode ramjet engines. Large Eddy Simulations (LES) of spray combustion in an aeroengine are carried out to investigate how the different thermodynamic and chemical properties of alternative fuels lead to different emergent behavior. A novel set of thermodynamic correlations are developed for the spray model. The laminar burning velocity predictions are normalized by heat of combustion to reveal a more distinct fuel trend, with C1 burning slowest and C5 fastest. The ignition results highlight the contributions of the Negative Temperature Coefficient (NTC) effect, equivalence ratio, and hydrogen enrichment in determining ignition time scales in dual-mode ramjet engines. The spray results reveal that the volatile alternative jet fuels have short penetration depths and that the flame of the most chemically divergent fuel (C1) stabilizes relatively close to the spray.</p>}},
  author       = {{Åkerblom, Arvid and Passad, Martin and Ercole, Alessandro and Zettervall, Niklas and Nilsson, Elna J.K. and Fureby, Christer}},
  issn         = {{2226-4310}},
  keywords     = {{chemical kinetics; combustion; jet engines; LES; numerical simulations; spray; supersonic; sustainable aviation fuel; turbulence}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{MDPI AG}},
  series       = {{Aerospace}},
  title        = {{Numerical Modeling of Chemical Kinetics, Spray Dynamics, and Turbulent Combustion towards Sustainable Aviation}},
  url          = {{http://dx.doi.org/10.3390/aerospace11010031}},
  doi          = {{10.3390/aerospace11010031}},
  volume       = {{11}},
  year         = {{2024}},
}