Secondary atomization of firefighting liquid droplets by their collisions
| Parent link: | Atomization and Sprays Vol. 29, iss. 5.— 2019.— [P. 429-454] |
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| Autor principal: | |
| Autor Corporativo: | |
| Outros Autores: | , |
| Resumo: | Title screen The results of experimental research into the interaction between droplets of various firefighting compositions colliding with each other in a gas are described. We establish the characteristics and occurrence conditions of four droplet interaction regimes: coalescence (fusion), bounce (interaction through a gas cushion between droplets without direct contact), separation (size and number of liquid fragments remain the same), and disruption (breakup of both droplets). In the experiments, droplet velocities, radii, and impact angles, as well as component composition, temperature, and surfactant proportions are varied in the wide range typical of fire containment and suppression. We determine the variation ranges of key parameters in the dimensional and dimensionless coordinate systems that provide active droplet disruption, i.e. secondary atomization. Such an atomization scheme can be arranged in any part of a combustion chamber, outside or directly within the fire zone. We use the so-called interaction regime maps based on the coordinate systems considering the dimensionless angular and linear impact parameters, as well as Weber, Reynolds, Ohnesorge, and capillary numbers. Droplet disruption enhances the endothermic phase transformations in the flame combustion zone, optimizes the use of liquid compositions, and reduces the containment time. Hence, the most valuable experimental results are the conditions determined for a several-fold increase in the number of small fragments of high-potential firefighting compositions due to colliding droplets. We show typical size distributions of the newly formed liquid fragments as compared to the initial ones. Режим доступа: по договору с организацией-держателем ресурса |
| Idioma: | inglês |
| Publicado em: |
2019
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| Assuntos: | |
| Acesso em linha: | http://dx.doi.org/10.1615/AtomizSpr.2019030766 |
| Formato: | Recurso Electrónico Capítulo de Livro |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662919 |
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| 200 | 1 | |a Secondary atomization of firefighting liquid droplets by their collisions |f Ya. S. Solomatin, N. E. Shlegel, P. A. Strizhak | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 330 | |a The results of experimental research into the interaction between droplets of various firefighting compositions colliding with each other in a gas are described. We establish the characteristics and occurrence conditions of four droplet interaction regimes: coalescence (fusion), bounce (interaction through a gas cushion between droplets without direct contact), separation (size and number of liquid fragments remain the same), and disruption (breakup of both droplets). In the experiments, droplet velocities, radii, and impact angles, as well as component composition, temperature, and surfactant proportions are varied in the wide range typical of fire containment and suppression. We determine the variation ranges of key parameters in the dimensional and dimensionless coordinate systems that provide active droplet disruption, i.e. secondary atomization. Such an atomization scheme can be arranged in any part of a combustion chamber, outside or directly within the fire zone. We use the so-called interaction regime maps based on the coordinate systems considering the dimensionless angular and linear impact parameters, as well as Weber, Reynolds, Ohnesorge, and capillary numbers. Droplet disruption enhances the endothermic phase transformations in the flame combustion zone, optimizes the use of liquid compositions, and reduces the containment time. Hence, the most valuable experimental results are the conditions determined for a several-fold increase in the number of small fragments of high-potential firefighting compositions due to colliding droplets. We show typical size distributions of the newly formed liquid fragments as compared to the initial ones. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Atomization and Sprays | ||
| 463 | |t Vol. 29, iss. 5 |v [P. 429-454] |d 2019 | ||
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a firefighting liquid compositions | |
| 610 | 1 | |a solutions | |
| 610 | 1 | |a slurries | |
| 610 | 1 | |a emulsions | |
| 610 | 1 | |a droplets | |
| 610 | 1 | |a collisions | |
| 610 | 1 | |a secondary atomization | |
| 610 | 1 | |a high-temperature conditions | |
| 610 | 1 | |a капли | |
| 610 | 1 | |a эмульсии | |
| 700 | 1 | |a Solomatin |b Ya. S. |g Yaroslav Sergeevich | |
| 701 | 1 | |a Shlegel |b N. E. |c specialist in the field of heat and power engineering |c Research Engineer of Tomsk Polytechnic University |f 1995- |g Nikita Evgenjevich |3 (RuTPU)RU\TPU\pers\46675 |9 22331 | |
| 701 | 1 | |a Strizhak |b P. A. |c Specialist in the field of heat power energy |c Doctor of Physical and Mathematical Sciences (DSc), Professor of Tomsk Polytechnic University (TPU) |f 1985- |g Pavel Alexandrovich |3 (RuTPU)RU\TPU\pers\30871 |9 15117 | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Инженерная школа энергетики |b Научно-образовательный центр И. Н. Бутакова (НОЦ И. Н. Бутакова) |3 (RuTPU)RU\TPU\col\23504 |9 28320 |
| 801 | 2 | |a RU |b 63413507 |c 20201229 |g RCR | |
| 850 | |a 63413507 | ||
| 856 | 4 | |u http://dx.doi.org/10.1615/AtomizSpr.2019030766 | |
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