Modelling of premixed turbulent combustion of cornflour dust-air cloud using OpenFOAM

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Modelling of premixed turbulent combustion of cornflour dust-air cloud using OpenFOAM

38th Symposium Work in Progress Poster - WIPP Department of safety and transport, RISE Research Institutes of Sweden, Box 857, SE-501 15 Borås, Sweden

Department of Mechanics and Maritime Sciences, Chalmers University of Technology, SE-412 96 *Corresponding author: chen.huang@ri.se

Summary: Dust explosion is a constant threat to industries which deal with combustible powders such as pellets producers, food industry, metal industry and so on. The present work aims at

developing a numerical tool by (i) implementing a premixed turbulent combustion model into an open-source CFD software OpenFOAM, (ii) verifying the implementation using analytical solutions, and (iii) validating the approach in unsteady 3D RANS simulations of cornflour dust explosions investigated experimentally using the Leeds fan-stirred bomb [1-3]. A detailed description of this work is reported in a recent publication [4].

Chen Huanga,* and Andrei N. Lipatnikovb

Fig. 3. Comparison of

computed (open symbols) and measured (filled

symbols) mean flame speeds. The diamond symbol

represents the laminar flame speed multiplied with the density ratio.

Fig. 4. Computed (lines)

and measured (symbols) mean flame speeds vs. mean flame position.

Fig. 1. Schematic illustration of

cornflour dust explosion model.

Fig. 2. Comparison of computed values with analytical

solutions obtained from statistically 1-D planar flame propagating in “frozen” turbulence. (a) ҧ𝑐 vs. the normalized distance𝜉, (b) flame thickness vs time and (c) flame speed vs time.

References

1.Bradley, D., Chen, Z., and Swithenbank, J.R. Proc. Combust. Inst. 22 (1989) 1767-1775. 2.Bradley, D., El-Din Habik, S., and Swithenbank, J.R., Proc. Combust. Inst. 21 (1988) 249-256.

3.Bradley, D., Dixon-Lewis, G., and El-Din Habik, S. Combust. Flame 77 (1989) 41-50. 4. Huang, C., Lipatnikov, A. N. and Nessvi. K. J. Loss Prev. Process Ind. 67 (2020): 104237.

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Acknowledgements:The authors would like to acknowledge

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