Transformation of initially unatomized fire-extinguishing liquid arrays at free fall from different heights; Atomization and Sprays; Vol. 31, iss. 1

Transformation of initially unatomized fire-extinguishing liquid arrays at free fall from different heights; Atomization and Sprays; Vol. 31, iss. 1

Bibliographic Details
Parent link:Atomization and Sprays
Vol. 31, iss. 1.— 2021.— [P. 71-91]
Corporate Author: Национальный исследовательский Томский политехнический университет Инженерная школа энергетики Научно-образовательный центр И. Н. Бутакова (НОЦ И. Н. Бутакова)
Other Authors: Islamova A. G. Anastasiya Gomilievna, Kropotova S. S. Svetlana Sergeevna, Tkachenko P. P. Pavel Petrovich, Voytkov I. S. Ivan Sergeevich, Kuznetsov G. V. Geny Vladimirovich
Summary:Title screen
This paper presents experimental results on disintegration of initially unatomized extinguishing liquid arrays in the free fall from a variable height. In laboratory conditions, the discharge height varied in the range of 0.5-3 m, and in field tests it was 3-15 m. The initial volume of unatomized liquid varied in the range of 0.05-1 l. The following compositions were considered: pure water, bentonite suspension, foam agent emulsion, magnesium chloride, antipyrene, and flame-retardant solutions. When processing the research results, four stages of transformation of liquid arrays, leading to the formation of an aerosol, were determined. Data obtained in the experiments served to establish the dependences of the surface area covered by the discharged liquid. Using such dependences, the transformation characteristics of non-sprayed liquid arrays with volumes of up to 5000 l (maximum for helicopters) and 20,000 l (maximum for airplanes) at discharge heights of up to 100 m were calculated. General approximation expressions for water, suspension, solution, and emulsion were obtained to describe these dependences, taking into account the influence of the properties of liquids (viscosity, density, and surface tension) through the Ohnesorge number. These expressions allow predicting the minimum discharge heights of non-sprayed arrays with different component composition and volume, sufficient for the formation of an aerosol cloud with virtually unchanged dimensions (the forest coverage area, respectively) and dispersion.
Режим доступа: по договору с организацией-держателем ресурса
Language:English
Published: 2021
Subjects:
труды учёных ТПУ
электронный ресурс
unatomized arrays
fire extinguishing liquids
transformation
free fall
the area of coverage
Online Access:http://dx.doi.org/10.1615/AtomizSpr.2020033552
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663644

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