The implementation of flameless combustion in gas turbines is a recent research topic motivated by the potential for ultra-low NOx emissions and improvement of the combustion acoustics. This paper presents preliminary results of the implementation of flameless oxidation in a laboratory model of a cylindrical combustor (in view of stationary and micro gas turbines). Guidelines are given for the start-up of this combustion system. The experimental study then assesses, for atmospheric conditions, the combined effect of the air-to-fuel ratio, wall temperature and jet velocity on combustion stability. Global volumetric heat releases up to 16 MW/m3, and air pre-heat up to 265°C are attained. The numerical simulations give insight into the recirculating pattern of the flow and the state of mixing of reactants and products in the near-nozzle region. The turbulence-chemistry interaction is accounted for by means of the non-premixed flamelet-PDF approach (including finite rate chemistry and scalar dissipation rates up to the extinction limit).
On the Stability Range of a Cylindrical Combustor for Operation in the FLOX Regime
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Vaz, DC, Borges, ARJ, van Buijtenen, JP, & Spliethoff, H. "On the Stability Range of a Cylindrical Combustor for Operation in the FLOX Regime." Proceedings of the ASME Turbo Expo 2004: Power for Land, Sea, and Air. Volume 1: Turbo Expo 2004. Vienna, Austria. June 14–17, 2004. pp. 511-516. ASME. https://doi.org/10.1115/GT2004-53790
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