Investigation of the role of bulk properties and in-bed structure in the flow regime of buoyancy-dominated flame spread in porous fuel beds

In a quiescent atmosphere, the flame spread process in porous fuels is controlled to large degree by fuel bed structure, loading and bulk density, moisture content. Previous studies have shown that increases rate, fire intensity burning rate are observed with independent or decreases however neither of these parameters adequately describe physical processes control spread. A series laboratory-based, experiments involving beds differing structure were conducted absence wind slope effects consistent conditioning. Changes change behavior both flaming phase smouldering region behind front, while also influencing mechanisms contributing Bulk density independently affect above (buoyant flow regime) within (in-bed flow, gas temperature) bed. Increases buoyant velocity loading, along maximum in-bed entrainment induced towards approaching front. To fully understand complex interlinking regimes their role spread, physically linked internal must be developed.