EXPERIMENTAL RESULTS ON THE COMBUSTION RATE OF GRAPHITE EXPOSED TO A PLASMA-ARC FLOW
AEROSPACE CORP EL SEGUNDO CA
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Experimental data are presented on the combustion rate of ATJ- graphite specimens at surface temperatures from 1600 to 4100 R. The specimens were flat-faced cylinders in a subsonic stagnationpoint air flow from a 200-kW electric plasma arc. A comparison is made with the recent theoretical results of Welsh and Chung for the combustion of graphite under conditions where the effects of boundary layer diffusion and heterogeneous kinetics are both significant in limiting the combustion rate. The comparison indicates qualitative agreement between theory and experiment. The combustion rate varied over an extended range, the lower portion of which is ascribed to the well- recognized effect of heterogeneous kinetics, and the upper portion is believed to reflect a change in the effective product of combustion at the surface.
- Combustion and Ignition