Interaction of two diffusion flames spreading along a metal substrate wetted with different fuels

The paper reports an experimental and theoretical study of the interaction of two diffusion flames propagating over the surface of two different liquid fuels applied to both sides of a thin metal substrate. It is shown that in this system, there may be formation of a unified complex – a double-sided flame which has the properties of a steady-state flame with a peculiar structures. Some velocity and structural dependences for double-sided flames are determined. A mathematical model for a double-sided flame is proposed that adequately describes experimental relations. A physical model for a double-sided flame with a pulsating flame of the heavier fuel is formulated.