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MEASUREMENT OF SMOKE LAYER INTERFACE HEIGHT FOR HOT SMOKE TESTS IN TUNNELS

DOI: 10.1615/IHTC13.p26.230
11 pages

Longhua Hu
University of Science and Technology of China, Hefei, Anhui, China

Wan-ki Chow
Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong, China

Y. Z. Li
University of Science and Technology of China, Hefei, Anhui, China

R. Huo
University of Science and Technology of China, Hefei, Anhui, China

Abstract

There are always problems in determining the smoke layer interface height in a long tunnel while carrying out hot smoke tests in assessing smoke management systems with small fires. An experimental technique using infrared is proposed to track the smoke layer interface positions in this paper.
Field measurements were carried out in a tunnel of length 96 m with diesel pool fires up to 1.5 MW. The results on tracking the smoke layer interface front were compared with the measurements by thermocouples and visual observations. This technique is demonstrated to be useful for tracking the smoke layer interface. The proposed method is suitable for hot smoke tests in evaluating smoke management systems in long tunnels with small fires.

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