FIRE EXTINGUISHING BY INERT GASES IN THE MODEL OF ROOM WITH OPENINGS

It presents process patterns of fire extinguishing with the inert gas in confined room with one front opening. The article considers the assumptions that should be introduced in order to analyze the process pattern of fire extinguishing in confined room; and demonstrates that these assumptions will eliminate cumbersome and time-consuming calculations. Therein it is shown that the fire in confined room with intensive gas exchange is determined by the type and scope of fire load. It is established that the injection of an inert gas, e. g. carbon dioxide, into the room distorts the rate of fire which leads to repositioning of a neutral zone. Thus, the more gas is consumed, the faster decreases the level of the neutral zone. Burning stops as soon as the plane of zero pressure reaches the burning surface — if it is at the level or above the level of front opening. If the opening bottom is above the burning surface, burning almost ceases when the neutral zone reaches the opening bottom.