Effect of environmental conditions on fire combustion regimes in mechanically-ventilated compartments

This publication deals with under-ventilated combustion regimes in case of pool fire a confined- and mechanically-ventilated enclosure. The objective is to improve the understanding ventilated compartment focusing on effect size ventilation rate. It based dodecane tests conducted reduced scale (1.875 m3) enclosure considering two varying parameters, diameter air flow rate prior ignition. Three were identified: steady burning extinction by lack fuel or oxygen (fuel burnout) transient regime oxygen. A representation these proposed scaling parameters: reference global equivalence ratio, φo, volumetric heat release Results demonstrate that increasing φo reduces comparison its value an open atmosphere. While for low (HRR), reduction mainly due depletion, gas temperature has additional at higher HRR (about 16 kW/m3). compensates depletion increases conditions leading highest inside obtained scenarios high moderate φo.