Impact of internal entrainment on high intensity distributed combustion

摘要: Abstract Colorless Distributed Combustion (CDC) has shown ultra-low emissions and enhanced performance of simulated gas turbine combustors. To achieve distributed combustion, the flowfield must be tailored for desirable mixture preparation within combustor prior to ignition. Though CDC have been extensively studied using a variety geometries, heat release intensities, fuels, role internally recirculated hot reactive gases needs further investigated quantified obtain minimum requirement internal entrainment achieving reaction condition. In this paper, impact product on flame structure behavior is with focus fostering combustion provide guidelines seeking combustion. simulate from combustor, nitrogen carbon dioxide introduced air stream mixing fuel Increase in amounts (simulating increased recirculation) volume occupy larger an overall uniform distribution as revealed OH∗ chemiluminescence intensity. At same time, bluish replaced more almost invisible flame. The recirculation also decreased NO emission significantly amount burned. Lowering oxygen concentration 21% 15% (due resulted 80–90% reduction no CO sub PPM achieved at equivalence ratio 0.7. trend was demonstrated range temperature. lower than 16% setting