Academic Journal
The impact of water mist nozzle arrangements on the back-layering length in tunnel fires.
| Τίτλος: | The impact of water mist nozzle arrangements on the back-layering length in tunnel fires. |
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| Συγγραφείς: | Gao, Zihe1 (AUTHOR), Wang, Pengxiang1 (AUTHOR), Wang, Pu1 (AUTHOR), Peng, Lingyun2 (AUTHOR) penglingyun1013@foxmail.com |
| Πηγή: | Journal of Thermal Analysis & Calorimetry. Apr2026, p1-11. 11p. |
| Θεματικοί όροι: | *Firefighting, *Firefighting equipment, *Ventilation, *Cooling, *Fluid dynamics |
| Περίληψη: | Road tunnels significantly enhance transportation efficiency. However, the recurring threat of tunnel fires necessitates advanced safety measures; the integration of water mist systems with longitudinal ventilation provides a reliable method for fire suppression and smoke exhaust, which is vital for protecting both tunnel structures and human life. This study investigates the impact of nozzle arrangements, specifically single-, double-, and triple-row configurations on smoke back-layering length under longitudinal ventilation. To ensure comparability, all arrangements were evaluated using a constant total flow rate. The study characterizes the variation patterns of smoke back-layering length relative to nozzle arrangement and flow rate. Through non-dimensional analysis, a prediction formula was developed to quantify the relationship between flow rate and back-layering length across different nozzle configurations. The results demonstrate that the triple-row arrangement provides the superior control effect. This is because, at a constant flow rate, distributing water through a higher number of nozzles increases the coverage area of the smoke layer, thereby enhancing the cooling effect and effectively reducing the back-layering length. Specifically, the triple-row arrangement can reduce the back-layering length by up to 25% compared to the single-row configuration. [ABSTRACT FROM AUTHOR] |
| Βάση Δεδομένων: | Academic Search Index |
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