Effects of gas turbine combustor geometry variation on pollutant emission using a multi-annular, telescopic, swirl combustor

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A variable geometry swirl combustor, consisting of four concentric annuli was used to examine the effect of combustor geometry variation on pollutant emission. All annuli, except the central one, were equipped with vane-type swirl generators. Natural gas was used as the fuel. Air and fuel were introduced alternatively into the combustor annuli with the central annulus carrying the fuel. Species concentration measurements using gas chromatography, temperature measurements and NO gas analysis were conducted to evaluate the combustor performance. Detailed species and temperature measurements were obtained over a radial distance of 1.5 times the combustor exit radius and up to 2.5 diameters down-stream of the combustor. A total swirl number for the combustor was determined from a theoretical formulation. It is shown here that finer control of the local equivalence ratio and air/fuel mixing may be achieved, yielding optimal combustion efficiencies and low pollutant emission, via variation of the combustor geometry.

Original languageEnglish (US)
Title of host publicationCoal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791879061
StatePublished - 1990
EventASME 1990 International Gas Turbine and Aeroengine Congress and Exposition, GT 1990 - Brussels, Belgium
Duration: Jun 11 1990Jun 14 1990

Publication series

NameProceedings of the ASME Turbo Expo


OtherASME 1990 International Gas Turbine and Aeroengine Congress and Exposition, GT 1990

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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