The Acoustic Self-Excitation of a Bluff-Body Stabilised, Premixed Flame

摘要

The objective of this investigation in a laboratory combustion system was to understand why a premixed propane flame is acoustically excited with particular acoustic boundary conditions in par- ticular regions of the frequency spectrum. It was demonstrated that the phase of the heat release at various heights in the flame relative tot he burner exit velocity indicated a disturbance with a time-delay related to convention by the mean flow form the moment that it left the burner mouth.