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Study on smoke blocking and thermal radiation attenuation by water curtain in tunnel fire
A 1:10 scale model tunnel with a length, height and width of 9 m, 0.6 m and 0.8 m, respectively, was set up in this paper. A water curtain system was installed in the model to investigate the effect of water curtain systems on smoke flow and heat propagation. A reduced-scale experimental and theoret...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9816109/ https://www.ncbi.nlm.nih.gov/pubmed/36604577 http://dx.doi.org/10.1038/s41598-023-27437-2 |
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author | Chen, Yinuo Jia, Jinzhang Che, Guangbo Zhu, Zhiheng Shen, Zhiyuan Wu, Yumo |
author_facet | Chen, Yinuo Jia, Jinzhang Che, Guangbo Zhu, Zhiheng Shen, Zhiyuan Wu, Yumo |
author_sort | Chen, Yinuo |
collection | PubMed |
description | A 1:10 scale model tunnel with a length, height and width of 9 m, 0.6 m and 0.8 m, respectively, was set up in this paper. A water curtain system was installed in the model to investigate the effect of water curtain systems on smoke flow and heat propagation. A reduced-scale experimental and theoretical study was carried out by varying the heat release rate of the fire source, the water curtain pressure, and the number of water curtain rows. A series of tests were carried out for various setups to quantify each mechanism of interaction between the water mist and hot smoke, to propose a method for qualitatively analysing water curtain systems blocking the propagation of heat radiation and the flow of smoke from combustion, and to propose a method for predicting heat fluxes. The study found that the pressure of the water curtain, the number of rows, and the heat release rate of the fire source all had an effect on the smoke blocking effect of the water curtain system. This effect decreased as the heat release rate of the fire source increased and increased significantly with the pressure of the water curtain and the number of rows. The smoke blocking effect was quantified using conservation of momentum by establishing a dimensionless parameter R to represent the ratio of water curtain momentum to smoke momentum, as well as the ratio of heat flux before and after the water curtain to represent the smoke blocking capacity [Formula: see text] of the water curtain. The smoke blockage rate [Formula: see text] ranges between 40 and 75%, and the smoke blockage rate increases as the momentum R increases. Finally, in tunnel fires, a predictive model for the attenuation of heat radiation by water curtains has been developed, providing theoretical support for the quantitative study of the smoke and thermal blockage effects of water curtains, which is beneficial to the protection of human life in confined spaces. |
format | Online Article Text |
id | pubmed-9816109 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-98161092023-01-07 Study on smoke blocking and thermal radiation attenuation by water curtain in tunnel fire Chen, Yinuo Jia, Jinzhang Che, Guangbo Zhu, Zhiheng Shen, Zhiyuan Wu, Yumo Sci Rep Article A 1:10 scale model tunnel with a length, height and width of 9 m, 0.6 m and 0.8 m, respectively, was set up in this paper. A water curtain system was installed in the model to investigate the effect of water curtain systems on smoke flow and heat propagation. A reduced-scale experimental and theoretical study was carried out by varying the heat release rate of the fire source, the water curtain pressure, and the number of water curtain rows. A series of tests were carried out for various setups to quantify each mechanism of interaction between the water mist and hot smoke, to propose a method for qualitatively analysing water curtain systems blocking the propagation of heat radiation and the flow of smoke from combustion, and to propose a method for predicting heat fluxes. The study found that the pressure of the water curtain, the number of rows, and the heat release rate of the fire source all had an effect on the smoke blocking effect of the water curtain system. This effect decreased as the heat release rate of the fire source increased and increased significantly with the pressure of the water curtain and the number of rows. The smoke blocking effect was quantified using conservation of momentum by establishing a dimensionless parameter R to represent the ratio of water curtain momentum to smoke momentum, as well as the ratio of heat flux before and after the water curtain to represent the smoke blocking capacity [Formula: see text] of the water curtain. The smoke blockage rate [Formula: see text] ranges between 40 and 75%, and the smoke blockage rate increases as the momentum R increases. Finally, in tunnel fires, a predictive model for the attenuation of heat radiation by water curtains has been developed, providing theoretical support for the quantitative study of the smoke and thermal blockage effects of water curtains, which is beneficial to the protection of human life in confined spaces. Nature Publishing Group UK 2023-01-05 /pmc/articles/PMC9816109/ /pubmed/36604577 http://dx.doi.org/10.1038/s41598-023-27437-2 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Chen, Yinuo Jia, Jinzhang Che, Guangbo Zhu, Zhiheng Shen, Zhiyuan Wu, Yumo Study on smoke blocking and thermal radiation attenuation by water curtain in tunnel fire |
title | Study on smoke blocking and thermal radiation attenuation by water curtain in tunnel fire |
title_full | Study on smoke blocking and thermal radiation attenuation by water curtain in tunnel fire |
title_fullStr | Study on smoke blocking and thermal radiation attenuation by water curtain in tunnel fire |
title_full_unstemmed | Study on smoke blocking and thermal radiation attenuation by water curtain in tunnel fire |
title_short | Study on smoke blocking and thermal radiation attenuation by water curtain in tunnel fire |
title_sort | study on smoke blocking and thermal radiation attenuation by water curtain in tunnel fire |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9816109/ https://www.ncbi.nlm.nih.gov/pubmed/36604577 http://dx.doi.org/10.1038/s41598-023-27437-2 |
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