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Improvement of the Prototype of the Compressed Air Foam System and its Testing

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Abstract:

The prototype of the compressed air foam system was improved based on the evaluation of the numerical parameters obtained with the help of the developed mathematical model of the foam generation process and the pneumatic-hydraulic scheme. The prototype provides the possibility of foam generation both in autonomous mode, due to the installation of cylinders with compressed gas, and in stationary mode, due to the supply of compressed air from an external source. This allows the use of an improved model of the compressed air foam system both in stationary mode (dry pipes, gas stations, etc.) and for use on heavy and light fire trucks, which is important for large cities. Testing of the improved prototype of the system for extinguishing model fires was carried out. The system provides extinguishing of model fires of class 183 B and 144 B when using both a general-purpose foaming agent and a special film-forming foaming agent. When using a film-forming foaming agent, the extinguishing time was reduced by 1.75 times, the consumption of fire extinguishing solution by 1.47 times. But at the same time, it should be taken into account that the cost of the film-forming foaming agent Sofir (sofirafff 6 %) is more than 3.2 times the cost of the general-purpose foaming agent Sofir. The effectiveness of the improved model in extinguishing class A fires was also confirmed. The autonomous compressed air foam system ensures extinguishing of a class 4 A model fire in 90 seconds. Dry foam with a factor of 14 is noted to be more effective in extinguishing solid combustible substances.

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Periodical:

Applied Mechanics and Materials (Volume 917)

Pages:

59-68

DOI:

https://doi.org/10.4028/p-sj8kwY

Citation:

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Online since:

October 2023

Authors:

Anatolii Kodrik, Oleksandr Titenko, Stanislav Vinogradov, Stanislav Shakhov*

Keywords:

Compressed Air Foam Systems, Design, Extinguishing Efficiency, Firefighting, Mathematical Modeling

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© 2023 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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