An attempt for applying formulation of the carbon combustion in the stagnation flowfield to some experimental comparisons related to the boundary layer combustion

Critical condition related to the activation of solid fuel particles; comparisons with experimental results for char combustion in a quiescent environment

“…In addition, until the establishment of CO-flame, it has been confirmed [25,[43][44][45] that combustion proceeds with nearly frozen gas-phase chemistry, which has even be demonstrated by a numerical work [46] for small particles with detailed gas-phase chemistry. In the same manner, once the CO-flame is established, it is anticipated that combustion proceeds under nearly infinite gas-phase kinetics.…”

“…Experimental results of Smith [32] with petroleum coke are first examined because values for its kinetic parameters have already been confirmed through other experimental comparisons [45], with respect to the combustion rate in the stagnation flowfield. In the experiment conducted by Smith, small particles were suspended in a preheated airflow at an atmospheric pressure.…”

“…2 in black in color. The use of these data can be justified from the experimental comparisons [25,[43][44][45], in which fair estimation of the combustion rates has already been demonstrated, by use of the same kinetic parameters for the surface reaction, although those are results for other carbon, called the brush carbon, electrode carbon, artificial graphite, and/or others, as listed in Table 3. As far as the trend and approximate magnitude are concerned, non-ignited results that failed to burn are fairly separated from those with the surface reaction being activated.…”