NDLI: Emission Performance of a Micro Gas Turbine LPP-Combustor With Fuel Film Evaporation

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Liedtke, O. Schulz, A. Wittig, S.
Copyright Year	2003
Abstract	The present paper describes the emission performance of a newly designed liquid fuelled micro gas turbine combustor. In order to reduce pollutant emissions, in particular nitrogen oxides NOx, lean premixed pre-vaporized combustion is utilized. Both, combustor inlet pressure and temperature are very low due to the thermodynamic cycle conditions chosen. As a consequence, the heat available for fuel spray evaporation is not sufficient. The present combustor concept therefore uses fuel film evaporation on the hot inner surface of a premix tube. The heat for evaporating the liquid fuel film is provided by the outer counter flow of hot exhaust gases. To establish almost adiabatic conditions within the reaction zone the flame tube features a multi-layered design, consisting of ceramic rings forming the inner wall, an insulation compliant layer, and the outer metal casing. To demonstrate the potential for reducing pollutant emissions overall NOx and CO concentrations of the exhaust gases have been measured and analyzed. The impact of combustor loading parameter, equivalence ratio, staging of the combustion, and ratio between calculated reaction times and mean residence times on the formation of pollutant emissions is investigated in detail. Furthermore, the impact of the flame tube volume on pollutant emissions and combustion stability is considered at various operating conditions. Measured pollutant emissions indicate the great potential for pollutant reduction that is associated with the specific geometry of the combustor.
Sponsorship	International Gas Turbine Institute
Starting Page	521
Ending Page	528
Page Count	8
File Format	PDF
ISBN	0791836851
DOI	10.1115/GT2003-38697
e-ISBN	0791836711
Volume Number	Volume 2: Turbo Expo 2003
Conference Proceedings	ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference
Language	English
Publisher Date	2003-06-16
Publisher Place	Atlanta, Georgia, USA
Access Restriction	Subscribed
Subject Keyword	Insulation Temperature Stability Micro gas turbines Metals Sprays Combustion Evaporation Ceramics Fuels Flow (dynamics) Pressure Emissions Exhaust systems Design Geometry Gases Pollution Flames Heat Nitrogen oxides Thermodynamic cycles Combustion chambers
Content Type	Text
Resource Type	Article

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