Theoretical and numerical analysis of oscillating diffusion flames

Published on Nov 1, 2016in Combustion and Flame4.12
· DOI :10.1016/j.combustflame.2016.08.023
Milan Miklavčič13
Estimated H-index: 13
(MSU: Michigan State University),
Indrek S. Wichman22
Estimated H-index: 22
(MSU: Michigan State University)
Abstract A novel method is presented for solving the forced transient diffusion flame in the exit region of a coflow burner. Streamwise diffusion is eliminated, which produces the Burke–Schumann model. A mathematical transformation renders the transient, forced convection problem equivalent to a steady-state convection problem. The transformation differs from previous approaches because its use does not require a priori restriction to small perturbations. For this reason, flow fluctuations that are large fractions of the initial flow field may be described exactly and features of nonlinear response can be examined without recourse to detailed numerical simulation. The method is applied to study flame evolution and oscillation for two physically separated coflow slot burner flames as they merge.
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