Influence of the dimensions of the grid cell and the distance from it to the nozzle of the foam-generating device on the foam dispersion

Authors

  • Andrey N. Kamlyuk State Educational Establishment «University of Сivil Protection of the Ministry for Emergency Situations of the Republic of Belarus»; 220118, Belarus, Minsk, Mashinostroiteley str., 25 https://orcid.org/0000-0002-9347-0778
  • Aleksey O. Likhomanov State Educational Establishment «University of Сivil Protection of the Ministry for Emergency Situations of the Republic of Belarus»; 220118, Belarus, Minsk, Mashinostroiteley str., 25 https://orcid.org/0000-0002-9374-1486
  • Artem F. Titovets State Educational Establishment «University of Сivil Protection of the Ministry for Emergency Situations of the Republic of Belarus»; 220118, Belarus, Minsk, Mashinostroiteley str., 25 https://orcid.org/0000-0002-9952-6525
  • Nikita S. Polochanin State Educational Establishment «University of Сivil Protection of the Ministry for Emergency Situations of the Republic of Belarus»; 220118, Belarus, Minsk, Mashinostroiteley str., 25 https://orcid.org/0000-0001-6066-4683
  • Aleksandr V. Grachulin State Educational Establishment «University of Сivil Protection of the Ministry for Emergency Situations of the Republic of Belarus»; 220118, Belarus, Minsk, Mashinostroiteley str., 25 https://orcid.org/0000-0003-3832-8258

DOI:

https://doi.org/10.33408/2519-237X.2022.6-4.441

Keywords:

foam, bubble diameter, bubble blowing speed, dispersion

Abstract

Purpose. To experimentally evaluate the influence of the size of the grid cell and the distance from the nozzle to it on the dispersion of the resulting air-mechanical foam. Based on the obtained experimental data, check the adequacy of theoretical calculations of the diameter of the bubble formed on the flooded and non-flooded holes.

Methods. In the course of the work the main theoretical and empirical research methods were used. To determine the diameter of foam bubbles the multifunctional graphic editor GIMP was used.

Findings. Empirical data on the diameter of foam bubbles were obtained for the following ranges of variable parameters: grid cell size from 0.5 × 0.5 to 3.2 × 3.2 mm; foaming solution jet velocity at the nozzle outlet from 7 to 17 m/s and the distance from the nozzle outlet to the grid from 50 to 400 mm. It was established that at a distance of 200 mm from the nozzle outlet to the grid the average diameter of the foam bubbles was closest to the theoretically calculated values (deviation no more than 26 %, average deviation 14 %).

Application field of research. Development of devices for generating air-mechanical foam on the grids.

Author Biographies

Andrey N. Kamlyuk, State Educational Establishment «University of Сivil Protection of the Ministry for Emergency Situations of the Republic of Belarus»; 220118, Belarus, Minsk, Mashinostroiteley str., 25

Deputy Chief of the University on Scientific and Innovative Activity; PhD in Physical and Mathematical Sciences, Associate Professor

Aleksey O. Likhomanov, State Educational Establishment «University of Сivil Protection of the Ministry for Emergency Situations of the Republic of Belarus»; 220118, Belarus, Minsk, Mashinostroiteley str., 25

Chair of Automatic System Security, Associate Professor; PhD in Technical Sciences

Artem F. Titovets, State Educational Establishment «University of Сivil Protection of the Ministry for Emergency Situations of the Republic of Belarus»; 220118, Belarus, Minsk, Mashinostroiteley str., 25

Technosphere Safety Faculty, cadet

Nikita S. Polochanin, State Educational Establishment «University of Сivil Protection of the Ministry for Emergency Situations of the Republic of Belarus»; 220118, Belarus, Minsk, Mashinostroiteley str., 25

Faculty of Emergency Prevention and Elimination, Cadet

Aleksandr V. Grachulin, State Educational Establishment «University of Сivil Protection of the Ministry for Emergency Situations of the Republic of Belarus»; 220118, Belarus, Minsk, Mashinostroiteley str., 25

Chair of Automatic Safety Systems, Senior Lecturer; PhD in Technical Sciences, Associate Professor

References

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Kachanov, I.V., Karpenchuk I.V., Pavlyukov S.Yu. Ustanovki avtomaticheskogo pozharotusheniya s predvaritel'noy aeratsiey ognetushashchey rabochey sredy [Automatic fire extinguishing installations with preliminary aeration of the fire extinguishing working environment]. Minsk: Belarusian National Technical University, 2018. 149 p. (rus)

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Published

2022-11-16

How to Cite

Kamlyuk А. Н., Likhomanov А. О., Titovets А. Ф., Polochanin Н. С. and Grachulin А. В. (2022) “Influence of the dimensions of the grid cell and the distance from it to the nozzle of the foam-generating device on the foam dispersion”, Journal of Civil Protection, 6(4), pp. 441–450. doi: 10.33408/2519-237X.2022.6-4.441.

Issue

Section

Fire and industrial safety (technical sciences)

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