Flame Spread Modelling of Complex Textile Materials |
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Authors: | Email author" target="_blank">Maria?HjohlmanEmail author Petra?Andersson Patrick?van?Hees |
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Affiliation: | 1.Department of Fire Technology,SP Technical Research Institute of Sweden,Bor?s,Sweden;2.Department of Fire Safety Engineering and Systems Safety, Faculty of Engineering,Lund University,Lund,Sweden |
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Abstract: | Flame spread in textile materials was modelled using two different simulation programs: the semi-empirical area-based code
ConeTools, and the computational fluid dynamics, CFD, code Fire Dynamics Simulator, FDS, (version 5). Two textile products
developed within the EU-project Flexifunbar were selected for study. The two products show a large difference in composition
and application area, one material is developed to function as a protecting layer for the underlying structure in case of
fire while the other is an insulating material with no requirements on fire performance. The products represent materials
for which fire test results indicate a classification on either end of the rating scale for wall materials according to EN
13501. Two FDS-models were developed for the simulations. The first FDS model was a relatively simple model of the small scale
Cone Calorimeter test (ISO 5660) which served the purpose of a first preliminary validation of the model for pyrolysis of
the material. In the second FDS model, a model of the intermediate scale Single Burning Item, SBI, test method (EN 13823),
the fire scenario was expanded to simulate flame spread over a surface. The work included determination of the necessary material
properties. In ConeTools, the option to predict an SBI test was used. The results from the two simulation methods were compared
to real SBI tests. Neither model was able to fully predict the heat release rate for these complex products. However, the
results from both codes were accurate enough to correctly predict the fire rating class for wall linings according to EN13501. |
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