Experimental determination of the laminar burning velocity of methane-oxygen-flames stabilized with cylindrical burners at various preheating temperatures

The laminar burning velocity of pure methane-oxygen flames stabilized with a cylindrical tube burner was determined experimentally via optical methods (Schlieren-technique and CH* chemiluminescence). Both flow exit profiles were examined: a fully developed and a plug flow profile. The experiments were conducted for an equivalence ratio range of 0.5 < Φ < 2.2, while the inlet temperature of the educts was set to 293 K. The results of the CH4-O2 flames show a maximum laminar burning velocity of approx. 360 cm/s near stoichiometric conditions.