Granular diffusion flame theory

Figure 4. Burning rate data plotted to test validity of granular diffusion flame theory (99)...

Figure 10. Granular diffusion flame theory predictions plotted as (p/r) vs. (p)2/3 for collapsed and distended A/PA flames...

The salient features of this picture of propellant burning have been incorporated into our theory below. However, in developing our theory, we assume a granular diffusion flame, and we retain the two-stage A/PA + O/F flame even at very low pressures. 

Figure 11. Pressure dependence of burning rate predicted by the granular diffusion flame theory for the case (1) where premixed ammonia/perchloric acid flame is distended and (2) where it is collapsed...

Figure 12. Effect of activation energy of surface reaction on burning rate behavior of granular diffusion flame theory with collapsed A/PA flame zone...

Figure 13. Pressure dependence of flame zone thicknesses predicted by granular diffusion flame theory with distended A/PA flame...

Normal-burning propellants such as PBAA-AP and PB(CT)-AP are in qualitative agreement with the behavior predicted by the granular diffusion flame theory when the NH3/HCIO4 reaction is considered distended. Quantitative comparison between theory and experiment is not... 

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