FLAME SPREAD OVER SOLID AND LIQUID FUELS.

The mechanism of a flame spread over solid and liquid fuels was studied. The horizontal flame spread over solid fuels especially for plastics is discussed. The various heats transferred from the flame to the fuel ahead of the flame front are estimated from the experimental data. The conductive heat through gas phase is seen to be dominant. The heat from the flame to the unburnt fuel calculated by the equation derived by Lastrina et al. agreed roughly with the value estimated from the data. The flame spread over liquid fuels is discussed. In the flame spread over non-volatile liquid, the fire point and the convection of the liquid are known to give effects on the flame spreading velocity. The flame spread over the volatile liquid under various ambient pressures and oxygen-enriched atmospheres is analyzed by the theory of flame propagation in the Bunsen burner and tube.