Accession Number:

AD0270791

Title:

FLAME PROPAGATION OVER A LIQUID SURFACE

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1962-01-15

Pagination or Media Count:

1.0

Abstract:

Experiments were carried out wit acetone, ethanol, benzene, and toluene. In the first series the temperature of the liquids varied within the limits o ignition, and in the second series it was below the flash point of the liquid. In a general way the mechanism of flame propagation over a liquid can be represented in the following manner as the closest layer of liquid is heated the surface tension over it increases to the value at which the vapor-air mixture is ignited. This flame in turn heats the next layer of liquid and ignites the combustible mixture over this layer, etc., so that the flame propagation velocity is determined by the burning rate of the liquid layers following each other. The higher the initial temperature of the surface, the smaller the time interval necessary for igniting the liquid and the higher the flame propagation velocity. On reaching the flash point the concentration of vapor over the surface was sufficient for the formation of an igniting mixture and the flame was propagated in the mixture without causing a noticeable heating of the liquid. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE