Numerical and Experimental Evaluation of a Dual-Fuel Dry-Low-NOx Micromix Combustor for Industrial Gas Turbine Applications

  • The Dry-Low-NOx (DLN) Micromix combustion technology has been developed originally as a low emission alternative for industrial gas turbine combustors fueled with hydrogen. Currently the ongoing research process targets flexible fuel operation with hydrogen and syngas fuel. The non-premixed combustion process features jet-in-crossflow-mixing of fuel and oxidizer and combustion through multiple miniaturized flames. The miniaturization of the flames leads to a significant reduction of NOx emissions due to the very short residence time of reactants in the flame. The paper presents the results of a numerical and experimental combustor test campaign. It is conducted as part of an integration study for a dual-fuel (H2 and H2/CO 90/10 Vol.%) Micromix combustion chamber prototype for application under full scale, pressurized gas turbine conditions in the auxiliary power unit Honeywell Garrett GTCP 36-300. In the presented experimental studies, the integration-optimized dual-fuel Micromix combustor geometry is tested at atmospheric pressure over a range of gas turbine operating conditions with hydrogen and syngas fuel. The experimental investigations are supported by numerical combustion and flow simulations. For validation, the results of experimental exhaust gas analyses are applied. Despite the significantly differing fuel characteristics between pure hydrogen and hydrogen-rich syngas the evaluated dual-fuel Micromix prototype shows a significant low NOx performance and high combustion efficiency. The combustor features an increased energy density that benefits manufacturing complexity and costs.

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Metadaten
Author:Harald FunkeORCiD, Nils Beckmann, Jan Keinz, Sylvester Abanteriba
DOI:https://doi.org/10.1115/GT2017-64795
ISBN:978-0-7918-5085-5
Parent Title (English):Proceedings of the ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. Volume 4B: Combustion, Fuels and Emissions. Charlotte, North Carolina, USA. June 26–30, 2017
Publisher:ASME
Place of publication:New York
Document Type:Conference Proceeding
Language:English
Year of Completion:2017
Note:
Paper No. GT2017-64795, V04BT04A045
Link:https://doi.org/10.1115/GT2017-64795
Zugriffsart:bezahl
Institutes:FH Aachen / Fachbereich Luft- und Raumfahrttechnik
collections:Verlag / American Society of Mechanical Engineers (ASME)
Licence (German): Urheberrechtlich geschützt