LES Simulation of a Model Gas-Turbine Lean Combustor: Impact of Coherent Flow Structures on the Temperature Field and Concentration of CO and NO

Leonid M. Chikishev, Dmitriy K. Sharaborin, Aleksei S. Lobasov, Artem A. Dekterev, Roman V. Tolstoguzov, Vladimir M. Dulin and Dmitriy M. Markovich
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Leonid M. Chikishev: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia
Dmitriy K. Sharaborin: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia
Aleksei S. Lobasov: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia
Artem A. Dekterev: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia
Roman V. Tolstoguzov: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia
Vladimir M. Dulin: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia
Dmitriy M. Markovich: Kutateladze Institute of Thermophysics, 1 Lavrentyev Avenue, 630090 Novosibirsk, Russia

Energies, 2022, vol. 15, issue 12, 1-26

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.

Keywords: gas-turbine combustor; lean methane flame; elevated pressure; particle image velocimetry; large eddy simulation; proper orthogonal decomposition; NOx emission (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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