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FGM modeling of ammonia/n-heptane combustion under RCCI engine conditions

Zhou, Yuchen LU ; Xu, Shijie LU orcid ; Xu, Leilei LU and Bai, Xue Song LU (2024) In Proceedings of the Combustion Institute 40(1-4).
Abstract

A novel flamelet-generated manifold (FGM) model is introduced, encompassing ignition and flame propagation in ammonia/n-heptane dual-fuel combustion under reactivity-controlled compression ignition (RCCI) engine conditions. To generate the FGM mapping function (FGM tabulation) accounting for multiple combustion modes in RCCI combustion, a novel one-dimensional RCCI configuration (1D-RC) is proposed. It is shown that the 1D-RC can properly accommodate ignition, back-supported premixed flame propagation, and diffusion flame. A comprehensive assessment is carried out to validate the efficiency and accuracy of the new FGM tabulation method by using an apriori test using direct numerical simulation (DNS) data and comparing FGM-based DNS with... (More)

A novel flamelet-generated manifold (FGM) model is introduced, encompassing ignition and flame propagation in ammonia/n-heptane dual-fuel combustion under reactivity-controlled compression ignition (RCCI) engine conditions. To generate the FGM mapping function (FGM tabulation) accounting for multiple combustion modes in RCCI combustion, a novel one-dimensional RCCI configuration (1D-RC) is proposed. It is shown that the 1D-RC can properly accommodate ignition, back-supported premixed flame propagation, and diffusion flame. A comprehensive assessment is carried out to validate the efficiency and accuracy of the new FGM tabulation method by using an apriori test using direct numerical simulation (DNS) data and comparing FGM-based DNS with the original DNS results obtained utilizing a detailed chemical kinetic mechanism. It is found that the FGM model can accurately capture not only the overall combustion process but also the fine reaction zone structures and multiple combustion modes. The FGM-DNS is 160 times faster than the full DNS coupling with a detailed chemical kinetic mechanism.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ammonia combustion, Direct numerical simulation, Emission, Flamelet generated manifold, RCCI engine
in
Proceedings of the Combustion Institute
volume
40
issue
1-4
article number
105601
publisher
Elsevier
external identifiers
  • scopus:85199271468
ISSN
1540-7489
DOI
10.1016/j.proci.2024.105601
language
English
LU publication?
yes
id
8ffb323b-f199-486e-914a-2268658a82dd
date added to LUP
2024-12-18 15:51:31
date last changed
2025-04-04 15:02:11
@article{8ffb323b-f199-486e-914a-2268658a82dd,
  abstract     = {{<p>A novel flamelet-generated manifold (FGM) model is introduced, encompassing ignition and flame propagation in ammonia/n-heptane dual-fuel combustion under reactivity-controlled compression ignition (RCCI) engine conditions. To generate the FGM mapping function (FGM tabulation) accounting for multiple combustion modes in RCCI combustion, a novel one-dimensional RCCI configuration (1D-RC) is proposed. It is shown that the 1D-RC can properly accommodate ignition, back-supported premixed flame propagation, and diffusion flame. A comprehensive assessment is carried out to validate the efficiency and accuracy of the new FGM tabulation method by using an apriori test using direct numerical simulation (DNS) data and comparing FGM-based DNS with the original DNS results obtained utilizing a detailed chemical kinetic mechanism. It is found that the FGM model can accurately capture not only the overall combustion process but also the fine reaction zone structures and multiple combustion modes. The FGM-DNS is 160 times faster than the full DNS coupling with a detailed chemical kinetic mechanism.</p>}},
  author       = {{Zhou, Yuchen and Xu, Shijie and Xu, Leilei and Bai, Xue Song}},
  issn         = {{1540-7489}},
  keywords     = {{Ammonia combustion; Direct numerical simulation; Emission; Flamelet generated manifold; RCCI engine}},
  language     = {{eng}},
  number       = {{1-4}},
  publisher    = {{Elsevier}},
  series       = {{Proceedings of the Combustion Institute}},
  title        = {{FGM modeling of ammonia/n-heptane combustion under RCCI engine conditions}},
  url          = {{http://dx.doi.org/10.1016/j.proci.2024.105601}},
  doi          = {{10.1016/j.proci.2024.105601}},
  volume       = {{40}},
  year         = {{2024}},
}