B312 SIMULATIONS OF THREE-DIMENSIONAL COMBUSTION CHARACTERISTICS IN A REVERSE FLOW ANNULAR GAS TURBINE COMBUSTOR(Turbulent flame-3)

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This paper presents the three dimensional modeling of the combustion flow field in a reverse flow annular gas turbine combustor. Calculations are performed at 20° sector of the combustion chamber including the dilution holes and liner film cooling slots. The standard k-ε model is used for the turbulent flow. Combustion characteristics are predicted using an assumed β-PDF of fast chemistry. Two configurations of primary holes are examined in order to investigate its influence on the combustion flow field. Results provide that the configuration in which the primary jets are located in the midplane shows good jet mixing. Simulations are also carried out for the two operating conditions with various fuel mass flowrates. It is found that as the mass flowrate of fuel increases, the average exit temperature increases, whereas the temperature in primary zone reaches a maximum value under near stoichiometric condition. The predicted exit gas temperatures are compared with the corresponding experimental data and show good agreement.
社団法人日本機械学会の論文
2000-10-01