INPUT DATA OF BURNING WOOD FOR CFD MODELLING USING SMALL-SCALE EXPERIMENTS

Authors

  • Petr Hejtmánek Czech Technical University, Faculty of Civil Engineering, Department of Building Structures, Thákurova 2077/7, Prague, Czech Republic
  • Libor Ševčík Technical Institute of Fire Protection in Prague. Písková 42, Prague 4 – Modřany, Czech Republic
  • Kamila Cábová Czech Technical University, Faculty of Civil Engineering, Department of Steel and Timber Structures, Thákurova 2077/7, Prague, Czech Republic

DOI:

https://doi.org/10.14311/CEJ.2017.04.0038

Keywords:

Combustion of wood, Pine, FDS, Cone calorimeter, FTCH, Small-size experiment

Abstract

The paper presents an option how to acquire simplified input data for modelling of burning wood in CFD programmes. The option lies in combination of data from small- and molecular-scale experiments in order to describe the material as a one-reaction material property. Such virtual material would spread fire, develop the fire according to surrounding environment and it could be extinguished without using complex reaction molecular description. Series of experiments including elemental analysis, thermogravimetric analysis and difference thermal analysis, and combustion analysis were performed. Then the FDS model of burning pine wood in a cone calorimeter was built. In the model where those values were used. The model was validated to HRR (Heat Release Rate) from the real cone calorimeter experiment. The results show that for the purpose of CFD modelling the effective heat of combustion, which is one of the basic material property for fire modelling affecting the total intensity of burning, should be used. Using the net heat of combustion in the model leads to higher values of HRR in comparison to the real experiment data. Considering all the results shown in this paper, it was shown that it is possible to simulate burning of wood using the extrapolated data obtained in small-size experiments.

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References

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Published

2017-12-31

How to Cite

Hejtmánek, P., Ševčík, L., & Cábová, K. (2017). INPUT DATA OF BURNING WOOD FOR CFD MODELLING USING SMALL-SCALE EXPERIMENTS. Stavební Obzor - Civil Engineering Journal, 26(4). https://doi.org/10.14311/CEJ.2017.04.0038

Issue

Vol. 26 No. 4 (2017)

Section

Articles

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