High-Temperature Environmentally Friendly Combustion Chambers of Energy Gas Turbine Installations with Variable Fuel Gas Composition
L. A. Bulysova, V. D. Vasil'ev, M. M. Gutnik, K. S. Pugach
All-Russian Thermal Engineering Institute, Moscow, Russia
Keywords: combustion chamber, emissions of harmful substances, gas turbine installations, low-emission combustion, air-fuel mixture, burner device, sequential combustion
Abstract
This paper presents an analysis of trends in the development of combustion chambers for high- and medium-power gas turbine power units of advanced manufacturers pursuing a significant increase in the efficiency of the plants and fuel flexibility while maintaining environmental requirements. The experience in developing low-emission combustion chamber (LECC) in the All-Russian Thermal Engineering Institute is presented. The results of tests of the GT-16P LECC in a single-burner compartment with full parameters are presented. Its modification to a dual-zone configuration is shown, which made it possible to significantly extend the range of stable low-emission combustion over a wide temperature range of outside air. For acceptable values of NOx , it was possible to reach a combustor exhaust gas temperature of 1700 °C. An analysis is made of the designs of gas turbine LECC burners allowing to avoid the main problems arising when burning fuel with a high content of hydrogen: flame breakthrough into the premixing zone, high pressure losses on burners, and combustion instability. It is shown that these designs do not contain a blade swirler and a pronounced premixing zone.
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