NUMERICAL SIMULATION OF SGT-600 GAS TURBINE COMBUSTOR AND FLOW FIELD UNDER OPERATION CONDITION

In this paper، the combustion chamber of SGT600 gas turbine with 18 similar burners is numerically simulated from compressor outlet to turbine inlet with ANSYS CFX software to investigate the flow field and combustion properties. The three-dimensional simulation is carried out with a combustion model based on a turbulent flame speed closure (TFC) model for the 2-equation turbulence model، k-ε، in SGT600. Excellent agreement between the results of numerical analyses and experimental data was observed so that the error rate in calculated outlet temperature was 0. 1 percent. The numerical model predicted the temperature at the inner surface of the heat shield about 1390˚K. Also the maximum temperature of liner was 1285˚K. The temperature reduction shows the effects of cooling flow. Due to results، the CFD model enables the prediction of the temperature of heat shield and combustor’s wall and could determine the critical points of operation.