The experimental study on the flame extension length and maximum temperature of ceiling jet flame in the curved tunnel

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology Pub Date : 2025-03-17 DOI:10.1016/j.tust.2025.106571

Yang Gao , Yuhao Fang , Lunlun Gong , Shenlin Yang , Changfa Tao , Wei Xu

引用次数: 0

Abstract

This paper investigated the extension length and maximum temperature of ceiling jet flame with different fire source locations within the curved tunnel. A series of experiments were conducted in a 1:15 reduced-scale tunnel with four different bending radians. Two nozzle diameters (2 and 4 mm) and four fire source positions were considered, while the propane was used as the fuel gas. The experimental results reveal distinct extension characteristics of ceiling jet flame in both the transverse and longitudinal directions. Dimensionless correlations for the transverse and longitudinal extension length of ceiling jet flame have been developed. Additionally, the variation in maximum temperature under different tunnel bending radians was analyzed based on the flame geometry model, which leads to the establishment of theoretical model for predicting the maximum temperature.

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弯曲隧道中天花板射流火焰延伸长度和最高温度的实验研究

研究了弯曲隧道内不同火源位置的顶棚射流火焰的延伸长度和最高温度。采用四种不同弯曲弧度的1:15缩尺隧道进行了一系列试验。考虑两种喷嘴直径（2和4mm）和四个火源位置，使用丙烷作为燃料气体。实验结果表明，天花板射流火焰在横向和纵向上具有明显的扩展特性。建立了天花板喷射火焰横向和纵向延伸长度的无因次关系式。基于火焰几何模型，分析了不同弯曲弧度下隧道最高温度的变化规律，建立了隧道最高温度预测的理论模型。

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

Tunnelling and Underground Space Technology 工程技术-工程：土木

CiteScore

11.90

自引率

18.80%

发文量

454

审稿时长

10.8 months

期刊介绍： Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.