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Volume 9
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Subgrid Turbulent Flux Models for Large Eddy Simulations of Diffusion Flames in Space Propulsion

by
Daniel Martinez-Sanchis
1,*,
Andrej Sternin
1,2,
Sagnik Banik
1,
Oskar Haidn
1 and
Martin Tajmar
2
1
Chair of Space Propulsion, Technische Universität München, Boltzmannstraße 15, 85748 Garching, Germany
2
Chair of Space Systems, Technische Universität Dresden, Marschnerstraße 32, 01307 Dresden, Germany
*
Author to whom correspondence should be addressed.
Fluids 2024, 9(6), 124; https://doi.org/10.3390/fluids9060124
Submission received: 29 March 2024 / Revised: 16 May 2024 / Accepted: 22 May 2024 / Published: 26 May 2024
(This article belongs to the Special Issue Turbulence and Combustion)
Versions Notes

Abstract

Subgrid scale models for unresolved turbulent fluxes are investigated, with a focus on combustion for space propulsion applications. An extension to the gradient model is proposed, introducing a dependency on the local burning regimen. The dynamic behaviors of the model’s coefficients are investigated, and scaling laws are studied. The discussed models are validated using a DNS database of a high-pressure, turbulent, fuel-rich methane–oxygen diffusion flame. The operating point and turbulence characteristics are selected to resemble those of modern combustors for space propulsion applications to support the future usage of the devised model in this context.
Keywords: large eddy simulation; turbulence; combustion; methane; propulsion large eddy simulation; turbulence; combustion; methane; propulsion

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MDPI and ACS Style

Martinez-Sanchis, D.; Sternin, A.; Banik, S.; Haidn, O.; Tajmar, M. Subgrid Turbulent Flux Models for Large Eddy Simulations of Diffusion Flames in Space Propulsion. Fluids 2024, 9, 124. https://doi.org/10.3390/fluids9060124

AMA Style

Martinez-Sanchis D, Sternin A, Banik S, Haidn O, Tajmar M. Subgrid Turbulent Flux Models for Large Eddy Simulations of Diffusion Flames in Space Propulsion. Fluids. 2024; 9(6):124. https://doi.org/10.3390/fluids9060124

Chicago/Turabian Style

Martinez-Sanchis, Daniel, Andrej Sternin, Sagnik Banik, Oskar Haidn, and Martin Tajmar. 2024. "Subgrid Turbulent Flux Models for Large Eddy Simulations of Diffusion Flames in Space Propulsion" Fluids 9, no. 6: 124. https://doi.org/10.3390/fluids9060124

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