1966-02-01

Hydrocarbons in the Partial-Quench Zone of Flames: An Approach to the Study of the Flame Quenching Process 660112

A porous plate, flat flame burner was used in an attempt to approximate the transient flame quenching process at the combustion-chamber walls in an internal combustion engine with a steady-state model. The model used propane-air mixtures to provide a laminar flame propagating towards a relatively cool porous wall at approximately 1/16 the free flame velocity.
Flame temperature and hydrocarbon concentration profiles are presented, covering the distance from the wall to a point beyond the flame where the hydrocarbons were no longer detected. These were used to compute the total mass of unburned hydrocarbons per unit wall area. Results are presented for equivalence ratios ranging from 0.945 to 1.25, wall temperatures between 190-660 F, and combustion-chamber pressures of 1 and 2 atmospheres.

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