Abstract
Currently, one of the most perspective directions fire protection is the use of water mist extinguishing agents. An experimental study of phase transformations of water mist droplets (radius of 50 – 500 microns) in motion in a high-temperature (500 – 1800 K), typical products of combustion of petroleum products (gasoline, kerosene, acetone, alcohol). Use high speed (the speed of recording at least 105 images per second) and optical methods of recording streams of liquid and gas medium. The influence of the parameters of the test process (the initial temperature and the initial droplet size) at the rate of evaporation of atomized water under these conditions. The optimum droplet size histograms in extinguishing fluid stream, providing evaporation of atomized water flow.
Highlights
Most of the objects oil and gas industry are highly explosive
One of the most perspective directions fire protection is the use of water mist extinguishing agents
One of the ways to prevent the development of emergency situations, is to equip the production facilities with modern fire protection systems
Summary
Most of the objects oil and gas industry are highly explosive. One of the ways to prevent the development of emergency situations, is to equip the production facilities with modern fire protection systems. A popular means of fire suppression built and reconstructed facilities were modern systems using water mist. Features such systems have made them almost ideal for fighting fires. Due to the very high specific heat of vaporization - 2.26 MJ/kg when boiling water is an effective heat removal from the combustion zone. This can cause to a complete cessation of the combustion reaction. Upon evaporation of water in the high temperature region formed by vapor which prevents gas exchange at the time of the combustion products with the ambient air, and reduces the oxygen concentration near the combustion zone. The purpose of this work is the experimental study of phase transformations of the dispersed water droplets as they move in a few high-temperature combustion products of the most common liquid petroleum products using advanced optical techniques of digital "tracer" visualization and high-speed video recording
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