Validation of the Froude model applicability for flame and thermal properties of tunnel fires with different cross-section scale ratios

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2025-04-05 DOI:10.1016/j.icheatmasstransfer.2025.108916

Wenhao Yan, Chenguang Li, Pengju Zhao, Zihe Gao

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引用次数: 0

Abstract

In this paper, two series of tunnel fires with two cross-section scale ratios (0.71 and 0.565) were experimented to investigate the applicability of the Froude similarity principle in reduced-scale and prototypical tunnel fires, and the similarity of the flame length and temperature distribution in natural ventilation tunnel fires was discussed in detail. The results show that when flames of the same scale HRR are in the same flame stage, the transverse flame lengths of prototype and reduced- scale tunnel fires basically match after the scale ratio conversion, and the Froude model is applicable to the transverse flame length of tunnel fires. However, there is a significant discrepancy in the temperature rise at the impinging point under the same scale HRR with different flame impinging stages. At the same time, due to the fire source size as well as thermal radiation, there is a large temperature discrepancy in the near fire source region, which is not in line with the Froude model, while the temperature attenuation in the far fire source region tends to be consistent after the distance conversion, which is basically applicable to the Froude model.

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来源期刊

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.