Reynolds-average Navier-Stokes turbulence models assessment: A case study of CH 4 /H 2 /N 2 -air reacting jet.

Autor: Garcia Lovella Y; Universidad Central 'Marta Abreu' de Las Villas, Faculty of Mechanical and Industrial Engineering, Center for Energy and Environmental Technology Assessment, Santa Clara, 50100, Cuba.; Vrije Universiteit Brussel, Faculty of Engineering, Thermo and Fluid Dynamics, Brussels, 1050, Belgium.; Vrije Universiteit Brussel (VUB) and Université Libre de Bruxelles (ULB), Brussels Institute for Thermal-Fluid Systems and Clean Energy (BRITE), Brussels, 1050, Belgium., Herrera Moya I; Universidad Central 'Marta Abreu' de Las Villas, Faculty of Mechanical and Industrial Engineering, Center for Energy and Environmental Technology Assessment, Santa Clara, 50100, Cuba., Jayasuriya J; Royal Institute of Technology, Department of Energy Technology, Stockholm, 10044, Sweden., Blondeau J; Vrije Universiteit Brussel, Faculty of Engineering, Thermo and Fluid Dynamics, Brussels, 1050, Belgium.; Vrije Universiteit Brussel (VUB) and Université Libre de Bruxelles (ULB), Brussels Institute for Thermal-Fluid Systems and Clean Energy (BRITE), Brussels, 1050, Belgium.
Jazyk: angličtina
Zdroj: Heliyon [Heliyon] 2024 Mar 06; Vol. 10 (5), pp. e26956. Date of Electronic Publication: 2024 Mar 06 (Print Publication: 2024).
DOI: 10.1016/j.heliyon.2024.e26956
Abstrakt: Computational Fluid Dynamics has become a very powerful tool for developing engineering combustion devices, such as burners and furnaces. However, there are a wide variety of turbulence models, and some of them have proven to be more effective for some turbulent flow configurations than others. A reacting turbulent jet is a common flow configuration found in combustion engineering devices like burners. The present work assesses Reynolds-Average Navier-Stokes turbulence models, being tested on a CH 4 /H 2 /N 2 -Air reacting jet. Eight two-equation eddy-viscosity and three five-equation turbulence models were tested in the studied turbulent flow. Computational results were compared against experimental measurements in terms of flow field variables, mean mixture fraction, temperature, and species mass fraction. The findings suggest a strong influence of the turbulence model perforce on the mean mixture fraction as well as on the turbulence-chemistry interaction model. The modified version of the standard k-ε model proves to be the more reliable choice for this reactive flow configurations. Specially, where the flow patterns of the jet dictate the general flow physics. Near the fuel nozzle, both the Reynolds stress model with stress baseline k-ω (RSM-SBSL) and the standard k-ω model exhibit better agreement with experimental data than the conventional modified k-ε model. Moreover, findings from the standard modified k-ε model indicate a significant underestimation of spreading rates for radial samples in regions where jet spreading intensifies.
Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(© 2024 The Authors.)
Databáze: MEDLINE
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