Abstract
In this study the characteristics of multi-regime combustion are investigated using a multi-regime burner with well-defined inflow boundary conditions. Based on previous findings, the range of operating conditions is extended. Fluid dynamical and thermochemical states are analysed for a variety of fuel/air ratios. Based on comprehensive Raman/Rayleigh and combined particle image velocimetry and SO2 laser-induced fluorescence measurements, two selected operating conditions are compared in detail. To gain insight into the stabilization mechanism, results from flow field measurements and flame front tracking are conditionally analysed in a statistical approach. In this configuration flame stabilization is dominated by recirculation of hot flue gases from a premixed flame enveloping the jet-type lifted flame exhibiting extended zones of multi-regime combustion.
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