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Abstract: This article in view of the realistic requirement of fixed fire extinguishing system in the places of water-insoluble liquid, establishes stationary compressed air foam experiment platform in combination with the advantage of compressed air foam technology. Key component nozzle and mixing chamber of the system is designed. By cold spray test, obtains parameters of gas-liquid flow、pressure, foam mixing ratio which result in different types of foam. The division of different types of foam basis is put forward, and take drainage time as indicators, get the most stable foam parameter combination; by extinguishing experiment, get the better combination of dry foam and small nozzle whose extinguishing effect is best. The results can be guidance for production research of integrated compressed air foam and system application in combustible liquid places. [Copyright &y& Elsevier]

Abstract: In this article, based on simplifying of extinction agent''s extinguishing mechanism and the fuel''s combustion characteristic, an extinguishing model is established. Three kinds of fuels - 93 # gasoline, 0 # diesel oil, 95% ethanol, are applied. The compressed air Aqueous film forming foams (AFFF) is used as the extinction agent, The heat release rate of the fuels is obtained by the free burning test, the extinguishing time under different effective extinguishing intensity is obtained by the implementing actual extinguishing test. Investigation is implemented on extinguishing models of compressed air AFFF for diesel oil/gasoline extinguishing and insoluble AFFF for ethanol extinguishing, therefore the calculation method for the fire extinguishing models of different extinction agent for different fuels is obtained. [Copyright &y& Elsevier]