Effect of burner diameter on structure and instability of turbulent premixed flames

To understand the potential role that the diameter of a burner plays in flame structure and flame instability, the influence of burner diameter on the turbulent premixed flame structure was investigated in two Bunsen-type burners. The nozzle inner diameters were 8 and 10 mm, Reynolds numbers were 2200, 3300, and 4400, equivalence ratios ranged from 0.8 to 1.2, and velocity fluctuations were varied by using two turbulence generation systems. The...