Understanding Blowout Phenomena to the Induced Angle of V-Gutter-Stabilized Flames

AbstractThe combustion and flame blowout characteristics are investigated in a vitiated environment by placing the 60°, 90° and 120° V-gutters. The blowout is initiated through varying the equivalence ratio of reactants’ flow rates. The blowout is mainly investigated in ultra-lean condition where the equivalence ratio ranges from 0.18 to 0.8, by varying the length of the combustor; the blowout of flame takes place more quickly; it occurred in all tested gutter angles. On increasing the gutter angle from 60° to 120° the flame blowout takes place at Reynolds number from 2,500 to 6,000, which is inversely proportional to the gutter-induced angle of the gutter. The flame flashback possibility occurs due to aggression of the flame marching towards the blowout. The 120° V-gutter has possible flashback since the blowout takes place at very low Reynolds number. As the length of the combustor increases, it is also evident that flashback phenomenon occurred in the rigorous flame just before the flame blowout.