Study of pyrolysis and upward flame spread on charring materials-Part I: Experimental study

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Abstract

In this paper, we describe the results from an experimental campaign, focused on vertical upward flame spread over a charring material. First, for validation purposes of simulation tools, we report on cone calorimeter results for square (9.8 cm x 9.8 cm), 1.65 cm thick, medium density fibre samples, mounted horizontally. Temperature is shown at the surface and at different depths. The mass of the sample is continuously measured. From the raw data, we derive the temporal evolution of the mass loss rate due to pyrolysis. Different externally imposed heat fluxes are investigated (20, 30 and 50 kW/m(2)), onto dry and wet material. Afterwards, for the configuration of two particle board plates (0.025 m thick, 0.4 m wide and 2.5 m high), vertically mounted face to face is considered. Two different horizontal spacing distances between the two plates are studied (30.5 and 10.5 cm). The purpose of this set-up is to investigate the vertical upward flame spread with strong radiative heat feedback. To that purpose, the temporal evolution of surface temperature is measured over the height of the plates. The measurement data are used to test a pyrolysis model in numerical simulations. Copyright (C) 2010 John Wiley & Sons, Ltd.

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Subject classification (UKÄ) – MANDATORY

  • Other Civil Engineering
  • Building Technologies

Keywords

  • flame spread, pyrolysis, parallel plate, cone calorimeter
Original languageEnglish
Pages (from-to)209-229
JournalFire and Materials
Volume35
Issue number4
Publication statusPublished - 2011
Publication categoryResearch
Peer-reviewedYes