6.3. Burning of Condensed Phases

When most liquids or solids are projected into an atmosphere so that a combustible mixture is formed, an ignition of this mixture produces a flame that surrounds the liquid or solid phase. Except at the very lowest of pressures, around 106 Torr, this flame is a diffusion flame. If the condensed phase is a liquid fuel and the gaseous oxidizer is oxygen, the fuel evaporates from the liquid surface and diffuses to the flame front as the oxygen moves from the surroundings to the burning front. This picture of condensed-phase burning is most readily applied to droplet burning, but can also be applied to any liquid surface.
The rate at which the droplet evaporates and burns is generally considered to be determined by ...

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