Fire Safety Science Digital Archive

In this article, fractal theory is applied to further study the spread of forest fires. The fractal relations under variable wind velocities, wind directions, and level and isotropic fuel beds are analysed . A fractal model is presented on the basis of self-similarity of fractal curve and the feature of the uneven boundary of fire field. A area formula of fire field is deduced from 1. 2618 coch curve. It turns out that average errors of relative values are small; the wider a fire field is, the smaller a relative error will be in calculation. The model is sufficiently simple, quite flexible, rather accurate and convenient to deal with forest fire spread in the initial stage.