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Experimental Study of Flame Spread on Conveyor Belts in a Small-Scale Tunnel

Public Domain
File Language:
English


Details

  • Personal Author:
  • Corporate Authors:
    National Institute for Occupational Safety and Health. Pittsburgh Research Laboratory
  • Description:
    This paper presents experimental results for conveyor belt flame spread from tests conducted in a small-scale tunnel. The purpose of this study is to investigate the effects of belt type, ventilation velocity, belt surface-to-roof distance and ignition source power on the flame spread properties. The tunnel used was 4.9 m long by 0.46 m square with the ventilation velocity ranging from 0.7 to 3.2 m/s. The ignition source was an impinged methane jet burner with heat output ranging from 7 to 21 kW. The belts tested included non-fire resistant rubber belts, fire-resistant rubber belts, fire-resistant neoprene belt and fire-resistant PVC belt with belt samples measuring 0.23 m wide by 2.5 m long. Experimental results show that with a ventilation velocity of 1.02 m/s all conveyor belts could be ignited, and that with sufficient ignition source power, flames spread the full length of the belt sample. The data showed a coupling effect of the ventilation air velocity and the belt surface-to-roof distance on the flame spread rate. For instance, flames could not spread with a ventilation velocity higher than 1.52 m/s and a surface-to-roof distance of 0.22 m. The use of the measured CO/CO2 ratio as an indicator of combustion stoichiometry is also discussed.
  • Subjects:
  • Source:
    Fire and Materials 2007 -10th International Conference, January 29-31, 2007, San Francisco, California. London: Interscience Communications, 2007 Feb; :1-10
  • Document Type:
    Text
  • Genre:
    Conference Publications
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • NIOSHTIC Number:
    nn:20031658
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:78b10ea7e654cec7093a16a6d7acd50d1e7d228e219ec7169d5903e595e2f7e010d8c20f1c6ab13fb6e8af665c74c07899fea5a7f6cfc85afe5bf6d479e7f306
  • Download URL:
  • File Type:
    Filetype[PDF - 234.87 KB ]
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