backdraft

listen to the pronunciation of backdraft
Englisch - Englisch
An extreme fire behavior phenomena involving ignition of products of combustion (such as carbon monoxide) and pyrolysis products upon introduction of oxygen to a compartment. In this phenomena the fuel generally is at a high temperature (above 600 degrees C), but combustion is limited by a lack of oxygen. Introduction of atmospheric oxygen results in explosive combustion. Backdraft is often incorrectly referred to as a smoke explosion which is a completely different extreme fire behavior phenomenon
An extreme fire behavior phenomena involving ignition of products of combustion (such as carbon monoxide) and pyrolysis products upon introduction of oxygen to a compartment. In this phenomena the fuel generally is at a high temperature (above 600 degrees C), but combustion is limited by a lack of oxygen. Introduction of atmospheric oxygen results in explosive combustion. Backdraft is often incorrectly referred to as a smoke explosion which is a completely different extreme fire behavior phenomena
A reverse taper from the designed direction of draw from a pattern or corebox; prevents removal of a pattern from a mold without damage to the mold-tear ups
{i} backdraught, situation when a fire that has absorbed all available oxygen explodes suddenly when more oxygen is re-introduced to the fire; current of air or water that flows backwards down into a pipe or chimney
inside buildings, when the oxygen in a room is almost used up, the fire begins to die down from lack of the substance; the flames lower and the room fills with smoke; but if you open the door to the room at that time, the fire sucks oxygen in so hard that fire gases explode
An explosive increase in the volume of fire when oxygen is suddenly allowed to enter an enclosed space where the contents have been smoldering for a period of time Because the enclosed fire consumes the available oxygen, the air pressure inside may be lower than outside Sometimes an incipient backdraft can be detected by observing the smoke being sucked back into the fire building, with brief puffs of smoke being forced back out periodically A backdraft is a smoke explosion and should not be confused with a condition known as flashover, where all of the contents of a room simultaneously burst into flames because of the intense heat in the room
An explosion or rapid burning of heated gases in a confined structure A backdraft may occur because of inadequate or improper ventilation procedures The force of the backdraft depends on variables like the size of the confined area, the extent to which smoldering has occurred (thus providing fuel), the degree of heating of the atmosphere, and the rate at which air or oxygen is introduced While the risk of such an occurrence is low, a backdraft is almost always fatal to anyone caught in it