LAPSE:2023.12511
Published Article
LAPSE:2023.12511
LES Simulation of a Model Gas-Turbine Lean Combustor: Impact of Coherent Flow Structures on the Temperature Field and Concentration of CO and NO
February 28, 2023
Abstract
The present paper reports on the numerical simulation of flow dynamics in a model gas-turbine combustor by large eddy simulation in order to evaluate the effect of coherent flow structures on the local fluctuations of gas temperature and local concentrations of NO and CO. The simulations were performed for a generic swirler, based on the design by Turbomeca, for a Reynolds number of 15,000 at normal and elevated inlet temperature and pressure (up to 500 K and 3.4 atm). The simulation data were validated based on the velocity measurements by stereoscopic particle image velocimetry. In order to reveal coherent flow structures, the velocity snapshots were processed by the proper orthogonal method. The temporal coefficients of the decomposition were used to evaluate the conditional sampled spatial distributions of the temperature and species concentration. It is shown that the coherent fluctuations of temperature can locally reach up to 200 K with the fluctuations of NO up to 20%. Thus, the results demonstrate that coherent flow structures in a lean swirl combustor can sufficiently contribute to NOx emission.
The present paper reports on the numerical simulation of flow dynamics in a model gas-turbine combustor by large eddy simulation in order to evaluate the effect of coherent flow structures on the local fluctuations of gas temperature and local concentrations of NO and CO. The simulations were performed for a generic swirler, based on the design by Turbomeca, for a Reynolds number of 15,000 at normal and elevated inlet temperature and pressure (up to 500 K and 3.4 atm). The simulation data were validated based on the velocity measurements by stereoscopic particle image velocimetry. In order to reveal coherent flow structures, the velocity snapshots were processed by the proper orthogonal method. The temporal coefficients of the decomposition were used to evaluate the conditional sampled spatial distributions of the temperature and species concentration. It is shown that the coherent fluctuations of temperature can locally reach up to 200 K with the fluctuations of NO up to 20%. Thus, the results demonstrate that coherent flow structures in a lean swirl combustor can sufficiently contribute to NOx emission.
Record ID
Keywords
elevated pressure, gas-turbine combustor, large eddy simulation, lean methane flame, NOx emission, particle image velocimetry, proper orthogonal decomposition
Subject
Suggested Citation
Chikishev LM, Sharaborin DK, Lobasov AS, Dekterev AA, Tolstoguzov RV, Dulin VM, Markovich DM. LES Simulation of a Model Gas-Turbine Lean Combustor: Impact of Coherent Flow Structures on the Temperature Field and Concentration of CO and NO. (2023). LAPSE:2023.12511
Author Affiliations
Chikishev LM: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia; Department of Physics, Novosibirsk State University, 1 Pirogov Street, 630090 Novosibirsk, Russia
Sharaborin DK: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia; Department of Physics, Novosibirsk State University, 1 Pirogov Street, 630090 Novosibirsk, Russia
Lobasov AS: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia; Department of Physics, Novosibirsk State University, 1 Pirogov Street, 630090 Novosibirsk, Russia
Dekterev AA: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia [ORCID]
Tolstoguzov RV: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia; Department of Physics, Novosibirsk State University, 1 Pirogov Street, 630090 Novosibirsk, Russia
Dulin VM: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia; Department of Physics, Novosibirsk State University, 1 Pirogov Street, 630090 Novosibirsk, Russia [ORCID]
Markovich DM: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia; Department of Physics, Novosibirsk State University, 1 Pirogov Street, 630090 Novosibirsk, Russia
Sharaborin DK: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia; Department of Physics, Novosibirsk State University, 1 Pirogov Street, 630090 Novosibirsk, Russia
Lobasov AS: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia; Department of Physics, Novosibirsk State University, 1 Pirogov Street, 630090 Novosibirsk, Russia
Dekterev AA: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia [ORCID]
Tolstoguzov RV: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia; Department of Physics, Novosibirsk State University, 1 Pirogov Street, 630090 Novosibirsk, Russia
Dulin VM: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia; Department of Physics, Novosibirsk State University, 1 Pirogov Street, 630090 Novosibirsk, Russia [ORCID]
Markovich DM: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia; Department of Physics, Novosibirsk State University, 1 Pirogov Street, 630090 Novosibirsk, Russia
Journal Name
Energies
Volume
15
Issue
12
First Page
4362
Year
2022
Publication Date
2022-06-15
ISSN
1996-1073
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PII: en15124362, Publication Type: Journal Article
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LAPSE:2023.12511
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https://doi.org/10.3390/en15124362
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