Experimental investigation on lift-off, blowout and drop-back in partially premixed LPG open flames in tubular burner

The higher pollutant level in non premixed combustion and safety issues pertaining to can be counteracted by partially-premixed mode of combustion. partially flames (PPF) exhibit the benefits both flames. PPF enhances complete leading reduced soot formation hence lower emission. However, equivalence ratio plays an important role stability such This paper reports experimental investigation on flame characteristics LPG-air tubular burner. curve obtained for base case without any secondary flow shows that velocity at lift-off, drop-back blowout increases with increasing ratio. In presence co-flow air, lift-off blow off decreases compared indicating poor due extensive stretch aerodynamic quenching. results show lift off, out drop back are swirl air than case. Co-swirl better mixing increased residence time. Flame deteriorates as strains boundary stretch.