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CFD analysis and application of dynamic mode decomposition for resonant-mode identification and damping in an SGT-100 DLE combustion system

Abdallah Abou-Taouk (Institutionen för tillämpad mekanik, Strömningslära) ; Suresh Sadasivuni ; Daniel Lörstad ; Bulat Ghenadie ; Lars-Erik Eriksson (Institutionen för tillämpad mekanik, Strömningslära)
Proceedings of the 7th European Combustion Meeting (2015)
[Konferensbidrag, refereegranskat]

This paper presents result of a turbulent reacting flow simulation based on a hybrid Unsteady Reynolds Averaged Navier Stokes/Large Eddy Simulation model (Menter’s SAS-SST model) applied to an experimental version of an industrial gas turbine combustion chamber at a pressure of 6 bar. The kinetics were represented by a recently developed in-house 4-step reaction mechanism using 7 species. A reasonably good agreement with measurements is found concerning velocity, temperature, pressure loss, mixture fraction and fuel mass fraction. The dynamic mode decomposition algorithm is also used here in order to identify some resonant modes and to quantify their respective frequency and damping. A number of low frequency modes with combustion dynamics included are observed and compared with the measurements.

Nyckelord: Large Eddy Simulation, Chemistry Reduction, Optimization, Partially premixed turbulent flames, Swirling flames, DMD, dynamic mode decomposition, industrial gas burner

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Denna post skapades 2015-03-31. Senast ändrad 2015-03-31.
CPL Pubid: 214635


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