Abstract
Numerical simulation of water massif motion through the high temperature gases corresponding to the typical conditions of forest fires was carried out. Maximal values of part by volume of liquid evaporating from water massif under its motion through the flaming burning area were determined when solving the heat and mass transfer problem under the conditions of endothermic phase transformations. Influence of liquid phase transition heat on the heat and mass transfer conditions on the track of water massif was determined. The expediency of polydisperse interspaced in time and space atomization of water massifs under the large-scale (especially, forest fires) fire extinguishing was proved.
Highlights
One of the most widespread methods of influence on forest fires for the purpose of its localization and speed limitation of flame spread is the introduction of sufficiently large water weights in the burning area
Numerical simulation of water massif motion through the high temperature gases corresponding to the typical conditions of forest fires was carried out
The usage completeness evaluation of phase transformation in motion of “water slug” through the flame massif of certain height is appropriate for further development of forest fire extinguishing technologies
Summary
One of the most widespread methods of influence on forest fires for the purpose of its localization and speed limitation of flame spread is the introduction of sufficiently large (up to several tons) water weights in the burning area. The experimental data about the influence principles of moving through the flame “water slug” on the temperature decrease process in the burning area in the territory being worked using the aviation. The usage completeness evaluation of phase transformation in motion of “water slug” through the flame massif of certain height is appropriate for further development of forest fire extinguishing technologies. The solution of this problem with full statement taking into account the influence of all significant factors and processes is yet, obviously, impossible. The numerical solution results of problems about the single water droplet motion [1] and the group of such droplets disposed in a definite way relative to each other [2, 3] through the high temperature combustion products of different substances show the necessity of very time-consuming computations for the simulation of heat and mass transfer processes and phase transformations even with using of relatively simple models [1,2,3]
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