A backdraft can occur when a compartment fire has little or no ventilation, leading to slowing of gas-phase combustion
(due to the lack of oxygen); however, the combustible fuel gases
(unburnt fuel vapor and gas-phase combustion intermediates such as
hydrocarbons and carbon monoxide) and smoke (primarily particulate matter)
remain at a temperature hotter than the auto-ignition temperature of
the fuel mixture. If oxygen is then re-introduced to the compartment,
e.g. by opening a door or window to a closed room, combustion will
restart, often rapidly, as the gases are heated by the combustion and
expand rapidly because of the rapidly increasing temperature.
I was a firefighter during my time in the Air Force from 1995-1999. In addition to the better known backdraft (there was a Ron Howard-directed film called Backdraft in 1991 starring Kurt Russell), we were also warned about the dangers of a BLEVE- Boiling Liquid Expanding Vapor Explosion. Between backdrafts, BLEVEs, building collapse, aircraft munitions, and high temperatures, there was a lot of emphasis on things that could kill or injure us.
If I'm not mistaken, this film clip (https://www.youtube.com/watch?v=UM0jtD_OWLU) is from the same video we were shown when training at Goodfellow Air Force Base.
one of numerous links about the fire in the video:
https://ny.eater.com/2018/12/13/18139185/new-york-style-eats-sidetracks-zen-yai-fire-sunnyside-queens-nyc 12 People Injured and 3 Restaurants ‘Destroyed’ in Queens Fire - Flames began early Thursday morning inside the New York Style Eats diner, reports say
I was a firefighter during my time in the Air Force from 1995-1999. In addition to the better known backdraft (there was a Ron Howard-directed film called Backdraft in 1991 starring Kurt Russell), we were also warned about the dangers of a BLEVE- Boiling Liquid Expanding Vapor Explosion. Between backdrafts, BLEVEs, building collapse, aircraft munitions, and high temperatures, there was a lot of emphasis on things that could kill or injure us.
ReplyDeleteIf I'm not mistaken, this film clip (https://www.youtube.com/watch?v=UM0jtD_OWLU) is from the same video we were shown when training at Goodfellow Air Force Base.
Impressive!! Thanks, Eric.
Deleteone of numerous links about the fire in the video:
ReplyDeletehttps://ny.eater.com/2018/12/13/18139185/new-york-style-eats-sidetracks-zen-yai-fire-sunnyside-queens-nyc 12 People Injured and 3 Restaurants ‘Destroyed’ in Queens Fire - Flames began early Thursday morning inside the New York Style Eats diner, reports say
I-)