Experimental Study on the Isolation Effect of Air Curtain System in Bifurcation Tunnel Fire

IF 2.4 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Fire and Materials Pub Date : 2025-05-16 DOI:10.1002/fam.3299

Tao Li, Wenxuan Zhao, Jianing Yuan, Chun Mi, Yunping Yang, Chunxiang Wang, Zhengquan Chen, Longfei Chen, Yuchun Zhang

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Abstract

The complexity of urban tunnel structure increases the risk of tunnel fire, and the air curtain system plays an important role in controlling the spread of fire smoke and ensuring the safety of personnel. Based on theoretical analysis and tunnel model experiments, the isolation effect of different air curtain jet conditions on high-temperature fire smoke in bifurcated tunnel was studied. The results show that the air curtain system can effectively isolate the high-temperature smoke. For different firepower, compared to angle and thickness, wind speed has the best control effect on high-temperature smoke. The control effect of air curtain thickness takes second place. The effect of angle change is the least obvious. Meanwhile, based on the analysis of experimental results, it was found that when the air curtain parameters are selected as wind speed of 2.5 m/s, angle of 15°, and thickness of 0.16 m, the air curtain system has better smoke prevention efficiency. Finally, dimensionless analysis yielded a power law equation relating upstream temperature rise, firepower, and wind speed. This supports theoretically analyzing the air curtain's smoke prevention effect.

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风幕系统对分岔隧道火灾隔离效果的实验研究

城市隧道结构的复杂性增加了隧道火灾的危险性，而风幕系统在控制火灾烟气蔓延、保障人员安全方面发挥着重要作用。在理论分析和隧道模型实验的基础上，研究了不同风幕射流条件对分叉隧道高温火灾烟气的隔离效果。结果表明，空气幕系统能有效地隔离高温烟气。在不同火力下，风速对高温烟的控制效果优于角度和厚度。气幕厚度的控制作用次之。角度变化的影响是最不明显的。同时，通过对实验结果的分析发现，当风幕参数选择为风速为2.5 m/s、风幕角度为15°、风幕厚度为0.16 m时，风幕系统具有较好的防烟效果。最后，无量纲分析得出了上游温升、火力和风速相关的幂律方程。这为从理论上分析气幕的防烟效果提供了依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fire and Materials 工程技术-材料科学：综合

CiteScore

4.60

自引率

5.30%

发文量

审稿时长

3 months

期刊介绍： Fire and Materials is an international journal for scientific and technological communications directed at the fire properties of materials and the products into which they are made. This covers all aspects of the polymer field and the end uses where polymers find application; the important developments in the fields of natural products - wood and cellulosics; non-polymeric materials - metals and ceramics; as well as the chemistry and industrial applications of fire retardant chemicals. Contributions will be particularly welcomed on heat release; properties of combustion products - smoke opacity, toxicity and corrosivity; modelling and testing.