Research output: Contribution to journal › Article › peer-review
LES Simulation of a Model Gas-Turbine Lean Combustor: Impact of Coherent Flow Structures on the Temperature Field and Concentration of CO and NO. / Chikishev, Leonid M.; Sharaborin, Dmitriy K.; Lobasov, Aleksei S. et al.
In: Energies, Vol. 15, No. 12, 4362, 01.06.2022.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - LES Simulation of a Model Gas-Turbine Lean Combustor: Impact of Coherent Flow Structures on the Temperature Field and Concentration of CO and NO
AU - Chikishev, Leonid M.
AU - Sharaborin, Dmitriy K.
AU - Lobasov, Aleksei S.
AU - Dekterev, Artem A.
AU - Tolstoguzov, Roman V.
AU - Dulin, Vladimir M.
AU - Markovich, Dmitriy M.
N1 - Funding Information: Funding: Research was supported by the Ministry of Science and Higher Education of Russia, agreement No. 075-15-2020-806. Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2022/6/1
Y1 - 2022/6/1
N2 - 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.
AB - 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.
KW - elevated pressure
KW - gas-turbine combustor
KW - large eddy simulation
KW - lean methane flame
KW - NOx emission
KW - particle image velocimetry
KW - proper orthogonal decomposition
UR - http://www.scopus.com/inward/record.url?scp=85132722425&partnerID=8YFLogxK
U2 - 10.3390/en15124362
DO - 10.3390/en15124362
M3 - Article
AN - SCOPUS:85132722425
VL - 15
JO - Energies
JF - Energies
SN - 1996-1073
IS - 12
M1 - 4362
ER -
ID: 36542140