Abstract: A model was set up to describe the flame spreading oscillation on an aviation fuel oil pool. The chemical kinetic parameter was deduced by simulation, and, based on the measurement of flame temperature, the average reaction rates of flammable mixture were calculated and taken as a criterion for ignition. The large eddy simulation and mixture fraction model were applied to calculate the oscillations of aviation fuel flame spreading, and the pulsating of flame spread was divided into the development step and the fading step. The result indicated that there are mainly two combustion modes: diffusion and premix. The model for prediction of flame pulsating frequency was also established.

Key words: aviation fuel, flame spread, flame pulsation, combustion mode