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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

COMBUSTION CHARACTERISTICS OF PRESSURIZED METHANE-AIR COMBUSTOR FOR CHEMICAL GAS TURBINE SYSTEM

Get access (open in a dialog) DOI: 10.1615/IHTC11.4250
pages 283-288

要約

"Chemical Gas Turbine System" is expected to improve greatly a thermal efficiency compared to the conventional systems. In this system, the combustor which drives the first gas turbine is operated under fuel-rich condition. This fuel-rich combustor plays a central role in the improvement ofthermal efficiency. In this study, the profiles oftemperature and species concentrations in a model combustor are measured when it is operated under fuel-rich and pressurized conditions to obtain fundamental data for designing the practical combustor in the chemical gas turbine system Moreover, we develop the numerical combustion simulation to predict the combustion characteristics of turbulent methane-air diffusion flame in the model combustor.
The structure offuel-rich flame in the model combustor is clarified by the measured profiles of CO and H2 concentrations. When the combustor operated under fuel-rich conditions, the measured concentrations of CO and H2 are considerably high in the middle ofthe combustor. In this study, moreover, the results calculated by the combustion simulation are compared to the measured data. From the comparisons between measured and calculated radial profiles of species concentrations in the combustor, it is clear that this simulation conforms feirly well to the measured profiles in the upstream region of the combustor.