Flame pressure, quenching rate

Fig. 1 shows how the quenching rate in the burnt gases zone of a stochiometric flame increases linearly with the pressure. Beyond 50 torr the observed deviation from linear dependence is due to the exciting pulse duration itself. Extrapolation to 1 Atm. leads to a quenching rate Q = 109 s-1 which is close to the value found by Bonczyk and Shirley (6J for CH and CN in flames. 

Various kinds of information can be expected from the high pressure combustion and flame experiments Reaction kinetics data for conditions of very high collision rates. Results about combustion products obtained at high density and with the quenching action of supercritical water, without or with flame formation. Flame ignition temperatures in the high pressure aqueous phases and the ranges of stability can be determined as well as flame size, shape and perhaps temperature. Stationary diffusion flames at elevated pressures to 10 bar and to 40 bar are described in the literature [12 — 14]. 

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