Abstract
Abstract A numerical model of flame spread on a thermally thin fuel in opposed flow (Frey and T'ien, 1979) has been used to study the effect of the initial fuel bulk temperature on the extinction limit. The distribution of temperature, fuel fraction, reactivity, and local equivalence ratio are presented and analyzed for the near-limit case. When the fuel temperature is decreased, the fuel pyrolysis rate near the pyrolysis front decreases, the flame spread rate drops, the pyrolysis length diminishes and the flame size is reduced. When the flame reaches a certain critical size, depending on a number of parameters, extinction occurs.
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