Comprehensive testing of the sprinkler optimized by the foam expansion rate

Authors

  • Aleksey O. Likhomanov State Educational Establishment «University of Сivil Protection of the Ministry for Emergency Situations of the Republic of Belarus»; ul. Mashinostroiteley, 25, Minsk, 220118, Belarus https://orcid.org/0000-0002-9374-1486

DOI:

https://doi.org/10.33408/2519-237X.2019.3-3.247

Keywords:

automatic extinguishing system, sprinkler, optimal geometry, foam expansion rate, protected area, spraying intensity, spray uniformity

Abstract

Purpose. The verification of the experimental-statistical mathematical model for predicting the foam expansion rate depending on the sprinkler geometry and the determination of the spray characteristics of the sprinkler optimized by the foam expansion rate.

Methods. The verification of the developed model and the determination of the sprinkler spray characteristics was conducted using empirical method by carrying out laboratory and complex tests under real conditions.

Findings. Laboratory and complex tests under real conditions showed a sufficient degree of convergence of the results of experiments with the predicted values using a mathematical model (the deviation not more than 16.1 %). The expansion rate values of the foam generated by the optimal sprinkler in the range from 11.2 to 13.6 were obtained. These values are by 60–94 % higher compared to the currently used deflector type sprinklers. During complex test under real conditions the spray characteristics (protected area, spraying intensity and spray uniformity) of the optimal sprinkler were established. Further steps of increasing the foam sprinklers extinguishing efficiency were determined.

Application field of research. The obtained results can be used for designing of foam sprinklers for automatic extinguishing systems with increased extinguishing efficiency.

Author Biography

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

Faculty of Postgraduate Scientific Education, Adjunct

References

Rakowska J. Best practices for selection and application of firefighting foam. MATEC Web Conf., 2018. Vol. 247. 8 p. DOI: 10.1051/matecconf/201824700014.

Laundess A.J., Rayson M.S., Dlugogorski B.Z., Kennedy E.M. Small-Scale Test Protocol for Firefighting Foams DEF(AUST)5706: Effect of Bubble Size Distribution and Expansion Ratio. Fire Technology, 2011. Vol. 47, No. 1. Pp. 149–162. DOI: 10.1007/s10694-009-0136-2.

Kamluk A.N., Likhomanov A.O. Innovatsionnye podkhody pri optimizatsii konstruktsii pennykh pozharnykh orositeley s pomoshch'yu additivnykh tekhnologiy [Innovative way to optimize the design of foam fire sprinklers with the help of additive technologies]. News of Science and Technologies, 2018. Vol. 46, No. 3. Pp. 53–59. (rus) http://belisa.org.by/pdf/2018/NNT3/art8_NNT_3(46)_2018.pdf.

Kamluk A.N., Likhomanov A.O. Eksperimental'noe opredelenie ratsional'nykh geometricheskikh parametrov derzhatelya i razbryzgivatelya orositelya po kratnosti i ustoychivosti peny [Experimental determination of the rational geometrical parameters of the sprinkler frame arms and deflector on the expansion rate and stability of foam]. Proceedings of the National Academy of Sciences of Belarus. Physicaltechnical series, 2019. Vol. 64, No. 1. Pp. 60–68. (rus) DOI: 10.29235/1561-8358-2019-64-1-60-68.

Likhomanov A.O., Kamluk A.N. Matematicheskaya model' prognozirovaniya kratnosti peny v zavisimosti ot geometricheskikh parametrov rozetochnykh orositeley [Mathematical model for predicting foam expansion rate depending on the geometrical parameters of deflector type sprinkler]. Nauchnye i obrazovatel'nye problemy grazhdanskoy zashchity, 2019. Vol. 41, No. 2. Pp. 25–38. (rus)

Likhomanov A.O., Govor E.G., Kamluk A.N. Obosnovanie primeneniya rozetochnykh orositeley, izgotavlivaemykh pri pomoshchi additivnykh tekhnologiy, v eksperimental'nykh issledovaniyakh kachestvennykh kharakteristik vozdushno-mekhanicheskoy peny nizkoy kratnosti [The substantiation of the application of deflector sprinklers manufactured by additive technologies in experimental studies of qualitative characteristics of the low-expansion air-mechanical foam]. Journal of Civil Protection, 2018. Vol. 2, No. 1. Pp. 25–39. (rus) DOI: 10.33408/2519-237X.2018.2-1.25.

Downloads


Abstract views: 234
PDF Downloads: 136

Published

2019-08-05

How to Cite

Likhomanov А. (2019) “Comprehensive testing of the sprinkler optimized by the foam expansion rate”, Journal of Civil Protection, 3(3), pp. 247–254. doi: 10.33408/2519-237X.2019.3-3.247.