EQUILIBRIUM STRUCTURE OF THIN DIFFUSION FLAME ZONE
Technical rept. Feb-Aug 1965
AEROSPACE CORP SAN BERNARDINO CA
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The method of inner-and-outer expansions was used to analyze the initial broadening of a diffusion flame sheet caused by the nonvanishing equilibrium constant. Analytic expressions are derived for the thickness of the flame zone, and the position and the value of the maximum flame temperature. The thickness of the flame zone created by the nonvanishing equilibrium constant is found to be less than that created by the decreasing Damkohler number studied previously. Varying the stoichiometric coefficient of the fuel is found to affect the oxidant side of the flow to a greater degree than the fuel side itself, and vice versa. The problem of nonvanishing equilibrium constant is important when a fuel is injected into a hypersonic stream and the high energy of the stream begins to prevent the full release of the heat of combustion.
- Combustion and Ignition