Mathematical model of foam expansion rate generated in sprinklers
Foam solution discharge is always accompanied by changes in the operating pressure due to different pressure losses along the pipeline in automatic foam extinguishing systems. Changes in the operating pressure affect the process of a liquid jet fragmentation into droplets and the formation of foam f...
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| Format: | Article |
| Language: | English |
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Peter the Great St. Petersburg Polytechnic University
2024-11-01
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| Series: | Magazine of Civil Engineering |
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| Online Access: | http://engstroy.spbstu.ru/article/2024.131.02/ |
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| author | Kamluk Andrei Likhomanov Alexey Govor Eduard Grachulin Alexander |
| author_facet | Kamluk Andrei Likhomanov Alexey Govor Eduard Grachulin Alexander |
| author_sort | Kamluk Andrei |
| collection | DOAJ |
| description | Foam solution discharge is always accompanied by changes in the operating pressure due to different pressure losses along the pipeline in automatic foam extinguishing systems. Changes in the operating pressure affect the process of a liquid jet fragmentation into droplets and the formation of foam films. Therefore, to increase the accuracy of calculations when designing automatic foam extinguishing systems, it is worthwhile to evaluate the main characteristics of the foam in terms of fire extinguishing efficiency, in particular, its expansion. For this purpose, the generalization of the experimental data using the theory of similarity and taking into consideration the hydrodynamic features of the deflector type sprinkler operation and the properties of foam solution was carried out to develop a novel simplified mathematical model. This model allows to predict the foam expansion depending on the geometric parameters of the sprinkler elements and the empirical coefficient, which takes into account the peculiarities of the chemical composition of the foam concentrate. This new model predictions of foam expansion show good agreement with the experimentally measured foam expansion. The average error in foam expansion was less than 9 %. |
| format | Article |
| id | doaj-art-d0f5d497d0a8459d82ec36df1ce2aad8 |
| institution | OA Journals |
| issn | 2712-8172 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Peter the Great St. Petersburg Polytechnic University |
| record_format | Article |
| series | Magazine of Civil Engineering |
| spelling | doaj-art-d0f5d497d0a8459d82ec36df1ce2aad82025-08-20T02:11:25ZengPeter the Great St. Petersburg Polytechnic UniversityMagazine of Civil Engineering2712-81722024-11-01180710.34910/MCE.131.220714726Mathematical model of foam expansion rate generated in sprinklersKamluk Andrei0https://orcid.org/0000-0002-9347-0778Likhomanov Alexey1https://orcid.org/0000-0002-9374-1486Govor Eduard2https://orcid.org/0000-0002-4040-3264Grachulin Alexander3https://orcid.org/0000-0003-3832-8258University of Civil Protection of the Ministry of Emergency Situations of the Republic of BelarusUniversity of Civil Protection of the Ministry of Emergency Situations of the Republic of BelarusUniversity of Civil Protection of the Ministry of Emergency Situations of the Republic of BelarusUniversity of Civil Protection of the Ministry of Emergency Situations of the Republic of BelarusFoam solution discharge is always accompanied by changes in the operating pressure due to different pressure losses along the pipeline in automatic foam extinguishing systems. Changes in the operating pressure affect the process of a liquid jet fragmentation into droplets and the formation of foam films. Therefore, to increase the accuracy of calculations when designing automatic foam extinguishing systems, it is worthwhile to evaluate the main characteristics of the foam in terms of fire extinguishing efficiency, in particular, its expansion. For this purpose, the generalization of the experimental data using the theory of similarity and taking into consideration the hydrodynamic features of the deflector type sprinkler operation and the properties of foam solution was carried out to develop a novel simplified mathematical model. This model allows to predict the foam expansion depending on the geometric parameters of the sprinkler elements and the empirical coefficient, which takes into account the peculiarities of the chemical composition of the foam concentrate. This new model predictions of foam expansion show good agreement with the experimentally measured foam expansion. The average error in foam expansion was less than 9 %.http://engstroy.spbstu.ru/article/2024.131.02/automatic foam extinguishing systemsprinklernozzlefoamfoam expansionfluid dynamics |
| spellingShingle | Kamluk Andrei Likhomanov Alexey Govor Eduard Grachulin Alexander Mathematical model of foam expansion rate generated in sprinklers Magazine of Civil Engineering automatic foam extinguishing system sprinkler nozzle foam foam expansion fluid dynamics |
| title | Mathematical model of foam expansion rate generated in sprinklers |
| title_full | Mathematical model of foam expansion rate generated in sprinklers |
| title_fullStr | Mathematical model of foam expansion rate generated in sprinklers |
| title_full_unstemmed | Mathematical model of foam expansion rate generated in sprinklers |
| title_short | Mathematical model of foam expansion rate generated in sprinklers |
| title_sort | mathematical model of foam expansion rate generated in sprinklers |
| topic | automatic foam extinguishing system sprinkler nozzle foam foam expansion fluid dynamics |
| url | http://engstroy.spbstu.ru/article/2024.131.02/ |
| work_keys_str_mv | AT kamlukandrei mathematicalmodeloffoamexpansionrategeneratedinsprinklers AT likhomanovalexey mathematicalmodeloffoamexpansionrategeneratedinsprinklers AT govoreduard mathematicalmodeloffoamexpansionrategeneratedinsprinklers AT grachulinalexander mathematicalmodeloffoamexpansionrategeneratedinsprinklers |