Analysis of fire extinguishing performance and mechanisms in transformer oil pool fires by large-scale compressed nitrogen foam: Impact of different nozzle pressures

IF 1.9 4区工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY

Journal of Fire Sciences Pub Date : 2024-03-26 DOI:10.1177/07349041241238151

Fengju Shang, Jiaqing Zhang, Taiyun Zhu, Wen Su, Kaiyuan Li, Yanyan Zou, Yi Guo

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Abstract

This article investigates the suppression of transformer oil pool fires using compressed nitrogen aqueous film-forming foam extinguishing agents with varying nozzle pressures (0.1–0.4 MPa), and a comprehensive analysis of fire extinguishing behavior and resistance to re-ignition was conducted. The research findings indicate that at a nozzle pressure of 0.4 MPa, there is a significant enhancement in fire extinguishing efficiency, with a reduction in extinguishing time by 15.0%–29.2%, and an increase in resistance to re-ignition by 32.2%–48.2%, making it the optimal choice. In comparison to the 0.1 MPa condition, the maximum instantaneous emissions of CO and SO2 at 0.4 MPa are only 66.7%. The interaction of various effects, such as atomization, results in a significant enhancement of flame intensification and fire extinguishing effects when compressed nitrogen aqueous film-forming foam is sprayed at high nozzle pressures. The study provides valuable insights for firefighters in the practical use of foam extinguishing agents.

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大型压缩氮泡沫在变压器油池火灾中的灭火性能和机理分析：不同喷嘴压力的影响

本文研究了使用不同喷嘴压力（0.1-0.4 兆帕）的压缩氮水成膜泡沫灭火剂扑灭变压器油池火灾的情况，并对灭火行为和抗复燃能力进行了综合分析。研究结果表明，喷嘴压力为 0.4 兆帕时，灭火效率显著提高，灭火时间缩短 15.0%-29.2%，抗复燃能力提高 32.2%-48.2%，是最佳选择。与 0.1 MPa 条件相比，0.4 MPa 条件下 CO 和 SO2 的最大瞬时排放量仅为 66.7%。在高喷嘴压力下喷射压缩氮水成膜泡沫时，雾化等各种效应的相互作用导致火焰强化和灭火效果显著增强。这项研究为消防人员实际使用泡沫灭火剂提供了宝贵的启示。

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来源期刊

Journal of Fire Sciences 工程技术-材料科学：综合

CiteScore

4.00

自引率

0.00%

发文量

审稿时长

2.5 months

期刊介绍： The Journal of Fire Sciences is a leading journal for the reporting of significant fundamental and applied research that brings understanding of fire chemistry and fire physics to fire safety. Its content is aimed toward the prevention and mitigation of the adverse effects of fires involving combustible materials, as well as development of new tools to better address fire safety needs. The Journal of Fire Sciences covers experimental or theoretical studies of fire initiation and growth, flame retardant chemistry, fire physics relative to material behavior, fire containment, fire threat to people and the environment and fire safety engineering. This journal is a member of the Committee on Publication Ethics (COPE).