出典:Wiktionary
出典:『Wiktionary』 (2026/01/10 19:48 UTC 版)
backdraft (plural backdrafts)
出典:Wikipedia
出典:『Wikipedia』 (2011/03/23 05:27 UTC 版)
A backdraft is a situation which can occur when a fire's product-gases are starved of oxygen; consequently combustion slows (due to the lack of oxygen) but the combustible fuel gases (primarily CO) and smoke (primarily hydro-carbon free-radicals and particulate matter) remain at a temperature above the fire-point of the fuel gases. If oxygen is re-introduced to the fire, e.g. by opening a door (or window) to a closed room, combustion will restart, often resulting in an 'explosive' effect as the gases are heated by the combustion and expand rapidly because of the rapidly increasing temperature (see also flashover).