JP Journal of Heat and Mass Transfer
Volume 18, Issue 1, Pages 167 - 173
(October 2019) http://dx.doi.org/10.17654/HM018010167 |
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MOISTENING OF FOREST COMBUSTIBLE MATERIALS: THE OVERCOOLED WATER VAPOUR
M. G. Rudenko, I. S. Shcherbakov, N. P. Konovalov and P. N. Konovalov
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Abstract: This paper presents the conditions and results of tests on the use of a supercooled water vapour jet for moistening forest combustible materials that have a slight warm-up time through the thickness of the material (dry grass and thin branches). The condition of stopping and extinguishing the flame at the boundary between the treated and dry grass was taken as a criterion for the efficiency of moistening. A brief description of the main features of the supercooled steam jet is given. The experimental procedure including the moistening of dry dead grass produced at a given speed and simultaneous burning of grass was not steamed. At the first stage, the speed of creating a reference strip of high humidity was 0.5-1km/h; in the second stage, 1-1.5km/h; the third 1.5-2km/h and, in the fourth stage, 2.5-3km/h. The result of experiments revealed that: Supercooled water vapour can be used to create supporting strips of high humidity during the annealing of forest combustible materials and the movement speed of the operator, at which the fire stops, did not exceed 1.5km/h. |
Keywords and phrases: water vapour, turbulent jet, supercooled environment, forest fire, steppe fire.
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