Influence of air intake position on heat feedback to the fuel surface in mechanically ventilated compartment - An experimental study

The objective of this work is to study the effects air intake position on burning behaviour liquid pool inside a compartment mechanically ventilated thanks an exhaust fan. We analysed notably key issue relevant vaporization process at fuel surface which depends external heat feedback and controls release rate. Results indicated that flux, sum radiant fluxes from hot gases internal surfaces, can have significant contribution transmitted surface. This will depend position, parameters characteristic length scale enclosure. With duct in high flux walls seems be blocked by smoke present compartment, whereas with low fire subject non-negligible radiation both surfaces gases, even if oxygen concentration decreases close reaches value representative underventilated fires. These observations were made for heptane fires reduced enclosure length/height width 2 m, different pan diameters Air Change Per Hour (ACPH). allowed measurements fluxes, Mass Loss Rate (MLR), temperature. It also shown when inlet located upper part, poor circulation observed room level vicinity location insufficient. results extinction due lack oxygen. On other hand, enhances facilitating supply towards pool; case, extinguished after well established steady state phase. show MLR always greater enters lower part room, regardless around flame. Therefore, influences influencing availability sufficient Furthermore, rise ACPH logically increase MLR.