An Examination of the Partial Equilibration Hypothesis and Radial Recombination in 1/20 Atm Methane Flames.
Biordi-JC; Lazzara-CP; Papp-JF
16th Int'l Symp on Combust Mit 1976 :1097-1109
Slightly lean ch4-o2-ar flames at 0.042 Atm with and without small amounts of the inhibitor cf3br were probed using molecular beam-mass spectrometric techniques. All the principal radical and stable species concentration profiles and temperature profiles were measured in the primary and part of the secondary zone of these flames. Ratios of product concentrations to reactant concentrations were formed and compared with the equilibrium constant for several reactions to determine to what extent they may be considered balanced in various regions of the flames. Most of these reactions are not completely balanced until the maximum flame temperature is reached. Once they become equilibrated, their balance is maintained as the temperature and radical concentrations fall off in the secondary reaction zone. The radical decay in the secondary reaction zone is analyzed using the concept of pool decay. The important recombination reactions were also judged.
16th Int'l. Symp. on Combust., Mit, 1976, Pub. by Combust. Inst., Pgh., Pennsylvania, 1977, Pp 1097-1109