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Multidimensional chemistry coordinate mapping for Large Eddy Simulations of a turbulent premixed bluff-body burner

Vauquelin, Pierre LU orcid ; Zhou, Yuchen LU ; Åkerblom, Arvid LU ; Fureby, Christer LU and Bai, Xue Song LU (2025) AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025 In AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025
Abstract

In numerical combustion research, accurate chemical reaction mechanisms for heavy hydrocarbons are essential to investigate the flame dynamics of Sustainable Aviation Fuels (SAF) relative to conventional jet fuels. However, accounting for hundreds or thousands of reactions makes Finite-Rate Chemistry (FRC) Large Eddy Simulations (LES) impractical for realistic engineering scenarios. In the present work, a multidimensional Chemistry Coordinate Mapping (CCM) approach is employed to reduce the computational expense of FRC-LES for jet fuel combustion. In the CCM methodology, flow transport equations are Directly Integrated (DI) in the computational cells in physical space, whereas chemical reactions are mapped and integrated in a phase... (More)

In numerical combustion research, accurate chemical reaction mechanisms for heavy hydrocarbons are essential to investigate the flame dynamics of Sustainable Aviation Fuels (SAF) relative to conventional jet fuels. However, accounting for hundreds or thousands of reactions makes Finite-Rate Chemistry (FRC) Large Eddy Simulations (LES) impractical for realistic engineering scenarios. In the present work, a multidimensional Chemistry Coordinate Mapping (CCM) approach is employed to reduce the computational expense of FRC-LES for jet fuel combustion. In the CCM methodology, flow transport equations are Directly Integrated (DI) in the computational cells in physical space, whereas chemical reactions are mapped and integrated in a phase space made up of a few principal variables, improving simulation efficiency. In a turbulent premixSaveed bluff-body burner, the LES-CCM method is compared to experimental data and LES-DI results for conventional Jet A (or A2) and JP5 (or A3) fuels and alternative synthetic fuels, referred to as C1 and C5. Skeletal HyChem reaction mechanisms are utilized, ranging from 40 to 50 species and 200 to 300 reactions. A satisfying compromise is achieved between the accuracy of the results and the speedup factor, up to around five, depending on the CCM phase space dimension and the size of the reSaveaction mechanism.

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author
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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025
series title
AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025
publisher
American Institute of Aeronautics and Astronautics
conference name
AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025
conference location
Orlando, United States
conference dates
2025-01-06 - 2025-01-10
external identifiers
  • scopus:105001101147
ISBN
9781624107238
DOI
10.2514/6.2025-2485
language
English
LU publication?
yes
id
41910306-8402-4c21-ad14-8efe1b4ffd85
date added to LUP
2025-05-20 23:20:35
date last changed
2025-05-27 11:41:56
@inproceedings{41910306-8402-4c21-ad14-8efe1b4ffd85,
  abstract     = {{<p>In numerical combustion research, accurate chemical reaction mechanisms for heavy hydrocarbons are essential to investigate the flame dynamics of Sustainable Aviation Fuels (SAF) relative to conventional jet fuels. However, accounting for hundreds or thousands of reactions makes Finite-Rate Chemistry (FRC) Large Eddy Simulations (LES) impractical for realistic engineering scenarios. In the present work, a multidimensional Chemistry Coordinate Mapping (CCM) approach is employed to reduce the computational expense of FRC-LES for jet fuel combustion. In the CCM methodology, flow transport equations are Directly Integrated (DI) in the computational cells in physical space, whereas chemical reactions are mapped and integrated in a phase space made up of a few principal variables, improving simulation efficiency. In a turbulent premixSaveed bluff-body burner, the LES-CCM method is compared to experimental data and LES-DI results for conventional Jet A (or A2) and JP5 (or A3) fuels and alternative synthetic fuels, referred to as C1 and C5. Skeletal HyChem reaction mechanisms are utilized, ranging from 40 to 50 species and 200 to 300 reactions. A satisfying compromise is achieved between the accuracy of the results and the speedup factor, up to around five, depending on the CCM phase space dimension and the size of the reSaveaction mechanism.</p>}},
  author       = {{Vauquelin, Pierre and Zhou, Yuchen and Åkerblom, Arvid and Fureby, Christer and Bai, Xue Song}},
  booktitle    = {{AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025}},
  isbn         = {{9781624107238}},
  language     = {{eng}},
  publisher    = {{American Institute of Aeronautics and Astronautics}},
  series       = {{AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025}},
  title        = {{Multidimensional chemistry coordinate mapping for Large Eddy Simulations of a turbulent premixed bluff-body burner}},
  url          = {{http://dx.doi.org/10.2514/6.2025-2485}},
  doi          = {{10.2514/6.2025-2485}},
  year         = {{2025}},
}