Flame velocities of propane- and ethylene-oxygen-nitrogen mixtures

Dugger, Gordon L., Graab, Dorothy D.

Laminar flame velocities of propane and ethylene with oxygen-nitrogen mixtures containing 0.166 to 0.496 mole fraction of oxygen were determined as a function of mixture composition at 311 degrees and 422 degrees K by a Bunsen-burner method. For each case flame velocity increased linearly with oxygen concentration. Empirical equations including the effects of initial temperature and oxygen concentration were obtained. Thermal and diffusion theories were used to predict the relative effect of oxygen concentration on maximum flame velocity within 5 to 15 percent. No linear correlations between maximum flame velocity and calculated active particle concentrations were obtained.

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