Tracking a ceiling jet front for hot smoke tests in tunnels

L. H. Hu; R. Huo; Y. Z. Li; L. Yi; Z. H. Deng; H. B. Wang; Wan Ki Chow; H. Y. Yuan; T. Chen

doi:10.1177/0734904107065888

Tracking a ceiling jet front for hot smoke tests in tunnels

L. H. Hu, R. Huo, Y. Z. Li, L. Yi, Z. H. Deng, H. B. Wang, Wan Ki Chow, H. Y. Yuan, T. Chen

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

9 Citations (Scopus)

Abstract

There are difficulties in tracking the ceiling jet front while carrying out hot smoke tests in long tunnels with a small fire. In this study, an experimental method using infrared beams is suggested. The arrival time of the hot ceiling jet front to a designated position is measured by the abrupt attenuation of the infrared beam intensity. Field measurements are carried out in an underground tunnel of length 88 m. Diesel pool fires up to 1.5 MW are studied. The results on tracking the ceiling jet front are compared with the measurements by using the thermocouples, thermal resistors, and visual observations. This method is demonstrated to be useful for tracking the ceiling jet front at positions further away from the fire. Therefore, the method is suitable for studying the ceiling jet in hot smoke tests for evaluating smoke management systems in long tunnels.

Original language	English
Pages (from-to)	99-108
Number of pages	10
Journal	Journal of Fire Sciences
Volume	25
Issue number	2
DOIs	https://doi.org/10.1177/0734904107065888
Publication status	Published - 1 Mar 2007

Keywords

Ceiling jet front tracking
Infrared beam
Thermocouple

ASJC Scopus subject areas

Safety, Risk, Reliability and Quality
Mechanics of Materials
Mechanical Engineering

More information

10.1177/0734904107065888

Cite this

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title = "Tracking a ceiling jet front for hot smoke tests in tunnels",

abstract = "There are difficulties in tracking the ceiling jet front while carrying out hot smoke tests in long tunnels with a small fire. In this study, an experimental method using infrared beams is suggested. The arrival time of the hot ceiling jet front to a designated position is measured by the abrupt attenuation of the infrared beam intensity. Field measurements are carried out in an underground tunnel of length 88 m. Diesel pool fires up to 1.5 MW are studied. The results on tracking the ceiling jet front are compared with the measurements by using the thermocouples, thermal resistors, and visual observations. This method is demonstrated to be useful for tracking the ceiling jet front at positions further away from the fire. Therefore, the method is suitable for studying the ceiling jet in hot smoke tests for evaluating smoke management systems in long tunnels.",

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AU - Hu, L. H.

AU - Huo, R.

AU - Li, Y. Z.

AU - Yi, L.

AU - Deng, Z. H.

AU - Wang, H. B.

AU - Chow, Wan Ki

AU - Yuan, H. Y.

AU - Chen, T.

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AB - There are difficulties in tracking the ceiling jet front while carrying out hot smoke tests in long tunnels with a small fire. In this study, an experimental method using infrared beams is suggested. The arrival time of the hot ceiling jet front to a designated position is measured by the abrupt attenuation of the infrared beam intensity. Field measurements are carried out in an underground tunnel of length 88 m. Diesel pool fires up to 1.5 MW are studied. The results on tracking the ceiling jet front are compared with the measurements by using the thermocouples, thermal resistors, and visual observations. This method is demonstrated to be useful for tracking the ceiling jet front at positions further away from the fire. Therefore, the method is suitable for studying the ceiling jet in hot smoke tests for evaluating smoke management systems in long tunnels.

KW - Ceiling jet front tracking

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KW - Thermocouple

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Tracking a ceiling jet front for hot smoke tests in tunnels

Abstract

Keywords

ASJC Scopus subject areas

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