Lifted and reattached behaviour of laminar premixed flame under external acoustic excitation

The flame chemiluminescent emission fluctuations and the vortex structure of the lifted jet flame under acoustic excitation were studied in this investigation. By employing high-speed visualization and DFCD (Digital Flame Colour Discrimination) image processing method, the fluctuation of the instantaneous mixture fraction has been found highly correlated with the lifted height variations. It has been observed that during the flame drifting to...