Investigation of mixing processes of effusion cooling air and main flow in a single sector model gas turbine combustor at elevated pressure
作者： Max Greifenstein , Andreas Dreizler
DOI: 10.1016/J.IJHEATFLUIDFLOW.2020.108768
关键词: Combustor 、 Air mass (solar energy) 、 Seeding 、 Effusion 、 Mixing (process engineering) 、 Flow (psychology) 、 Materials science 、 Adiabatic process 、 Mechanics 、 Combustion
摘要: Abstract Mixing processes between main flow and effusion cooling air are investigated in an cooled, swirl-stabilized pressurized single sector gas turbine combustor using advanced laser diagnostics. Quantitative planar laser-induced fluorescence of the hydroxyl radical (OH-PLIF) nitric oxide, seeded to air, (NO-PLIF) employed primary zone close cooled liner. This data is used identify mixing events at three stages premixed combustion, i.e. before reaction, during reaction after reaction. A parametric study swirl mass conducted investigate mutual interaction flame air. Within zone, a significant radial asymmetry OH concentration observed. partly explained by presence within unburned fresh gas, leading lowered local zones their post-flame equilibrium concentration. Near liner, adiabatic dominant process across all operating conditions. Notable only observed for first hole on center line low
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