Lift-off and Blow-off of Laminar Jet Premixed Flame of Flammable Mixture with Inert Gas

概要

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The effect of physico-chemical properties of an inert gas on the lift-off and blow-off of a laminar jet premixed flame from the burner exit was investigated experimentally. The inert gases; Helium, Argon, Carbon dioxide and Nitrogen, were premixed in the mixture of Methane-Oxygen of which the equivalence ratio is 2.1～2.4 and the exit flow velocity is 100～120 cm/s. Critical concentrations of the inert gases for the stable attachment of the flame base and for the blow-off of the lifted flame base were examined. It was shown that the properties of the inert gas; the density, the diffusion coefficient, the thermal diffusivity, and the shape of burner exit rim have a large influence on the stability of the base of the jet premixed flame.
長岡工業高等専門学校の論文
2004-10-30